WO2024250076A1

WO2024250076A1 - A formwork

Info

Publication number: WO2024250076A1
Application number: PCT/AU2024/050607
Authority: WO
Inventors: Brett Jeffrey Johnston; Ryan Simmonds
Original assignee: Rombus World Pty Ltd
Current assignee: Rombus World Pty Ltd
Priority date: 2023-06-08
Filing date: 2024-06-07
Publication date: 2024-12-12
Anticipated expiration: 2025-12-08

Abstract

A formwork (100) comprises a plurality of walls (102). The walls (102) define a plurality of cells (104). Each cell (104) extends from a first cell opening (124) to a second cell end (122). The plurality of cells (104) comprises a plurality of peripheral cells (130). The plurality of cells (104) comprises a plurality of internal cells (140).

Description

TECHNICAL FIELD

[0001] This disclosure relates to a formwork. In particular, this disclosure relates to a formwork with a plurality of cells that are defined by walls of the formwork.

BACKGROUND

[0002] Pavements may be constructed as either flexible pavements or rigid pavements. Each type of construction has specific benefits and drawbacks. Pavements as described herein include any trafficable structure, material and/or substance that is positioned on an area that is intended to sustain vehicular or foot traffic. For example, pavements include, but are not limited to, footpaths, cycle paths, roads, rail track beds, parking lots and runways.

[0003] Flexible pavements include a sub-base course laid onto subgrade or existing native material, a base course laid on top of the sub-base, and a bituminous surface course laid on the base course. The surface course includes one or more bituminous or hot mix asphalt (HMA) layers.

[0004] The structural characteristics of the flexible pavement are determined by the combination of the different layers, and the surface course alone has negligible structural integrity, as the load is distributed into the subjacent layers.

[0005] Although by volume the materials required to construct flexible pavements are relatively cheap, the nature of the construction means that, especially in roads that are required to support high loads, the depth and material volume required is significant, with highways requiring over a metre of additional material to be provided on top of the subgrade.

[0006] Therefore, the cost of construction of flexible pavements, especially those experiencing high loads, is significant. Similarly, the logistical requirements of getting the required volume of material to remote locations can also be problematic.

[0007] Damage to flexible pavements is also common, as the surface course does not have significant structural integrity, and holes can be caused by impacts, such as impacts resulting from rocks being forced into the surface by traffic loads.

[0008] As vehicles pass across the surface course of a flexible pavement, the friction from the tires causes it to expand. Over time, this can lead to surface cracks, allowing water to gradually erode the surface course from underneath and/or within, causing larger cracks and potholes to form.

[0009] Where cavities or voids appear in either the base course or sub-base, which may result from a pothole or other defect, repair of the flexible pavement is difficult and costly, as the entire section of pavement must be excavated and re-laid. Flexible pavement is also affected by extreme temperatures which cause the surface to become tacky. This can lead to further deterioration of the flexible pavement. [0010] Rigid pavements, on the other hand, include a surface course, typically in the form of a concrete slab, poured above a base course and optionally a sub-base laid upon the subgrade. The rigidity provided by the concrete slab allows the load to be distributed more evenly, potentially allowing for fewer, or shallower, subjacent courses.

[0011] Concrete is adversely affected by temperature changes, and expansion associated cracking may be mitigated by having a number of separate slabs, with adjacent slabs tied together with steel dowels or tie bars, for example.

[0012] Concrete is also relatively expensive by volume, and although the construction of a rigid pavement requires less depth than a flexible pavement, the cost of construction is greater by area. Additionally, the logistics of providing concrete to remote locations is significant, and as such, rigid pavements are simply not a viable option for many remote applications.

[0013] Cracking of concrete is common due to high loads, especially towards edges of slabs where the supporting base course may be more susceptible to movement. Repair of concrete slabs is also more difficult than flexible pavements, as a cracked concrete slab must be cut out and new concrete poured in place, rather than simply filling a small hole with bituminous or HMA product. In addition, where cavities or subsidence appears in either the base course or sub-base, repair of the rigid pavement is difficult and costly, as the entire section of pavement must be excavated and re-laid. Installing rigid pavements can involve significant CO₂ and other greenhouse gas emissions, with the total emissions during construction potentially being 5 to 6 times higher than flexible pavements, largely due to the concrete volumes.

[0014] Thus, known methods of construction of pavements are expensive, requiring large material volumes and involving the emission of a considerable amount of CO₂ and other greenhouse gas emission. Further, existing pavements, whether they be flexible or rigid, are difficult to repair when damaged.

[0015] It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.

SUMMARY

[0016] In some embodiments, there is provided a formwork. The formwork may comprise a plurality of walls. The walls at least partially define a plurality of cells. In some embodiments, the walls define the plurality of cells. Each cell extends in an axial direction from a first cell end to a second cell end. The first cell end of each cell comprises a first cell opening. Each cell extends in the axial direction from the first cell opening to the second cell end. The plurality of cells comprises a plurality of peripheral cells. The plurality of cells comprises a plurality of internal cells. An axial dimension of one or more of the peripheral cells is less than an axial dimension of one or more of the internal cells. [0017] In some embodiments, the axial dimension of a particular cell of the plurality of cells is a distance, measured in the axial direction, between the first cell opening and the second cell end of the particular cell.

[0018] In some embodiments, the axial dimension of the particular cell is a shortest distance, measured in the axial direction, between the first cell opening and the second cell end of the particular cell.

[0019] In some embodiments, the plurality of peripheral cells comprises a first subset of peripheral cells.

[0020] In some embodiments, the first cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the first cell opening of one or more of the internal cells.

[0021] In some embodiments, there is provided a formwork. The formwork may comprise a plurality of walls. The walls at least partially define a plurality of cells. In some embodiments, the walls define the plurality of cells. Each cell extends in an axial direction from a first cell end to a second cell end. The first cell end of each cell comprises a first cell opening. Each cell extends in the axial direction from the first cell opening to the second cell end. The plurality of cells may comprise a plurality of peripheral cells. The plurality of cells may comprise a plurality of internal cells. The first cell openings of a first subset of the peripheral cells may be axially offset from the first cell opening of one or more of the internal cells.

[0022] In some embodiments, the internal cells are internal with respect to the peripheral cells. [0023] In some embodiments, the peripheral cells define at least part of a peripheral portion of the formwork.

[0024] In some embodiments, the internal cells define at least part of an internal portion of the formwork.

[0025] In some embodiments, the peripheral portion at least partially encircles the internal cells.

[0026] In some embodiments, the peripheral portion at least partially encircles the internal portion.

[0027] In some embodiments, an axial dimension of one or more of the peripheral cells is less than an axial dimension of one or more of the internal cells.

[0028] In some embodiments, the axial dimension of a particular cell of the plurality of cells is a distance, measured in the axial direction, between the first cell opening and the second cell end of the particular cell.

[0029] In some embodiments, the axial dimension of the particular cell is a shortest distance, measured in the axial direction, between the first cell opening and the second cell end of the particular cell.

[0030] In some embodiments, the first cell opening and the second cell end of one or more of the peripheral cells are closer together than the first cell opening and the second cell end of one or more of the internal cells. [0031] In some embodiments, the first cell openings of at least some of the peripheral cells of the first subset of peripheral cells are coplanar.

[0032] In some embodiments, the first cell opening of one or more of the peripheral cells is parallel to the first cell opening of one or more of the internal cells.

[0033] In some embodiments, a number of the cells comprise a respective second cell opening, the second cell opening of each cell being at its second cell end.

[0034] In some embodiments, each cell comprises a second cell opening, the second cell opening being at the second cell end of the respective cell.

[0035] In some embodiments, one or more of the peripheral cells of the first subset of peripheral cells comprises a respective second cell opening, the second cell opening of each of the one or more peripheral cells being at the second cell end of the respective peripheral cell.

[0036] In some embodiments, one or more of the internal cells comprises a respective second cell opening, the second cell opening of the one or more internal cells being at the second cell end of the respective internal cell.

[0037] In some embodiments, the second cell openings of the peripheral cells of the first subset of peripheral cells are coplanar.

[0038] In some embodiments, the second cell openings of the peripheral cells of the first subset of peripheral cells are coplanar with the second cell openings of the internal cells.

[0039] In some embodiments, the first cell opening of one or more of the peripheral cells of the first subset of peripheral cells is transverse to the second cell opening of the respective peripheral cell.

[0040] In some embodiments, the first cell opening of one or more of the peripheral cells of the first subset of peripheral cells is transverse to the first cell opening of one or more of the internal cells.

[0041] In some embodiments, the second cell opening of one or more of the peripheral cells is parallel to the first cell opening of one or more peripheral cells.

[0042] In some embodiments, the second cell opening of one or more of the peripheral cells is parallel to the first cell opening of one or more of the internal cells.

[0043] In some embodiments, the second cell opening of one or more of the peripheral cells is transverse to the first cell opening of one or more of the peripheral cells.

[0044] In some embodiments, the second cell opening of one or more of the peripheral cells is transverse to the first cell opening of one or more of the internal cells.

[0045] In some embodiments, the plurality of peripheral cells comprises a second subset of peripheral cells.

[0046] In some embodiments, one or more of the peripheral cells of the second subset of peripheral cells comprises a respective second cell opening, the second cell opening being at the second cell end of the respective cell. [0047] In some embodiments, the second cell openings of the peripheral cells of the second subset of peripheral cells are axially offset from the second cell opening of one or more of the internal cells.

[0048] In some embodiments, the second cell openings of the peripheral cells of the second subset of peripheral cells are axially offset from the second cell opening of one or more of the peripheral cells of the first subset of peripheral cells.

[0049] In some embodiments, the second cell openings of at least some of the peripheral cells of the second subset of peripheral cells are coplanar.

[0050] In some embodiments, the first cell openings of at least some of the peripheral cells of the second subset of peripheral cells are coplanar.

[0051] In some embodiments, the first cell openings of the peripheral cells of the second subset of peripheral cells are coplanar with the first cell openings of the internal cells.

[0052] In some embodiments, the first cell opening of one or more of the peripheral cells of the second subset of peripheral cells is transverse to the second cell opening of the respective peripheral cell.

[0053] In some embodiments, the first cell opening of one or more of the peripheral cells of the second subset of peripheral cells is transverse to the first cell opening of one or more of the internal cells.

[0054] In some embodiments, the second cell opening of one or more of the peripheral cells of the first subset of peripheral cells is smaller than the first cell opening of the respective cell.

[0055] In some embodiments, the second cell opening of one or more of the internal cells is smaller than the first cell opening of the respective cell.

[0056] In some embodiments, the second cell opening of one or more of the peripheral cells of the second subset of peripheral cells is smaller than the first cell opening of the respective cell. [0057] In some embodiments, the formwork further comprises a cantilever wall.

[0058] In some embodiments, the cantilever wall extends inwardly into a respective peripheral cell.

[0059] In some embodiments, the cantilever wall defines at least part of a cell of the plurality of cells.

[0060] In some embodiments, the formwork comprises a plurality of cantilever walls.

[0061] In some embodiments, one or more of the cantilever walls extends inwardly into a respective cell.

[0062] In some embodiments, one or more of the cantilever walls defines at least part of a cell of the plurality of cells.

[0063] In some embodiments, one or more of the cantilever walls extends inwardly into a respective peripheral cell.

[0064] In some embodiments, one or more of the cantilever walls defines at least part of a respective peripheral cell. [0065] In some embodiments, one or more of the cantilever walls is parallel with another of the cantilever walls.

[0066] In some embodiments, one or more of the cantilever walls is coplanar with one or more other cantilever walls.

[0067] In some embodiments, one or more of the cantilever walls extends inwardly into a respective internal cell.

[0068] In some embodiments, one or more of the cantilever walls defines at least part of a respective internal cell.

[0069] In some embodiments, one or more of the cantilever walls is axially offset with respect to one or more other cantilever wall.

[0070] In some embodiments, one or more of the cantilever walls that defines at least part of a peripheral cell is axially offset with respect to one or more of the cantilever walls that defines at least part of an internal cell.

[0071] In some embodiments, a distance, measured in the axial direction, between one or more of the cantilever walls that define part of a respective peripheral cell and the first cell opening of the respective peripheral cell is less than a distance, measured in the axial direction, between one or more of the cantilever walls that define part of an internal cell and the first cell opening of the respective internal cell.

[0072] In some embodiments, the cantilever walls define at least part of the second cell opening of the respective cell.

[0073] In some embodiments, at least some of the cells are arranged into a plurality of rows and a plurality of columns.

[0074] In some embodiments, a shape of the cells in a particular row is the same as the shape of the other cells in that row.

[0075] In some embodiments, the plurality of rows comprises alternating rows of cells of a first shape.

[0076] In some embodiments, the plurality of rows comprises alternating rows of cells of a second shape.

[0077] In some embodiments, the first shape is octagonal.

[0078] In some embodiments, the second shape is rectangular.

[0079] In some embodiments, the first subset of peripheral cells comprises a first row of cells.

[0080] In some embodiments, the first subset of peripheral cells comprises a first column of cells.

[0081] In some embodiments, the first row of cells and the first column of cells comprise one cell in common.

[0082] In some embodiments, the second subset of peripheral cells comprises a second row of cells. [0083] In some embodiments, the second subset of peripheral cells comprises a second column of cells.

[0084] In some embodiments, the second row of cells and the second column of cells comprise at least one cell in common.

[0085] In some embodiments, the peripheral cells are octagonal.

[0086] In some embodiments, a volume of one or more of the peripheral cells is less than a volume of one or more of the internal cells.

[0087] In some embodiments, a volume of one or more of the peripheral cells is greater than a volume of one or more of the internal cells.

[0088] In some embodiments, the plurality of cells comprises one or more connecting cells, the connecting cells being configured to receive part of a second formwork, thereby inhibiting movement between the formwork and the second formwork in at least one direction.

[0089] In some embodiments, the connecting cells are circular.

[0090] In some embodiments, the one or more connecting cells are defined, at least in part, by walls that also define at least part of one or more peripheral cells.

[0091] In some embodiments, the one or more connecting cells are defined, at least in part, by walls that also define at least part of one or more peripheral cells of the first subset of peripheral cells.

[0092] In some embodiments, the first cell openings of the one or more connecting cells are coplanar with one or more of the first cell openings of the peripheral cells of the first subset of peripheral cells.

[0093] In some embodiments, the second cell openings of one or more connecting cells are coplanar with one or more of the second cell openings of the peripheral cells of the first subset of peripheral cells.

[0094] In some embodiments, the formwork further comprises one or more projections, the one or more projections being configured to cooperate with another formwork to inhibit relative movement between the formwork and the other formwork.

[0095] In some embodiments, each of the one or more projections is configured to fit within a corresponding connecting cell of the other formwork.

[0096] In some embodiments, a shape of one or more of the projections is such that it can be received within a volume that has the same dimensions as one or more of the connecting cells. [0097] In some embodiments, the one or more projections project outwardly from one or more of the walls defining the peripheral cells of the second subset of peripheral cells.

[0098] In some embodiments, the one or more projections project away from the first openings of the peripheral cells of the second subset of peripheral cells.

[0099] In some embodiments, the one or more projections are closer to the second cell openings the peripheral cells of the second subset of peripheral cells than the first cell openings of those peripheral cells. [00100] In some embodiments, the first subset of peripheral cells and the second subset of peripheral cells are mutually exclusive.

[00101] In some embodiments, the walls defining one or more of the peripheral cells form a closed loop.

[00102] In some embodiments, the walls defining one or more of the peripheral cells do not form a closed loop. That is, they may form at least part of an open loop.

[00103] In some embodiments, the formwork is a permanent formwork.

[00104] In some embodiments, there is provided a formwork. The formwork may comprise a plurality of walls. The walls may define a plurality of cells. One or more of the cells may extend in an axial direction. Each cell may extend in the axial direction. One or more of the cells may extend in the axial direction from a first cell end to a second cell end. One or more of the cells may extend in the axial direction from a first cell opening to a second cell end. Each cell may extend in the axial direction from a first cell end to a second cell end. Each cell may extend in the axial direction from a first cell opening to a second cell end. The plurality of cells may comprise a plurality of peripheral cells. The plurality of cells may comprise a plurality of internal cells. The peripheral cells may define at least part of a peripheral portion of the formwork. The internal cells may define at least part of an internal portion of the formwork. The peripheral portion of the formwork may at least partially surround the internal portion of the formwork. The first cell opening and the second cell end of the peripheral cells may be closer together than the first cell opening and the second cell end of one or more of the internal cells. The plurality of peripheral cells may comprise a first subset of peripheral cells. The plurality of peripheral cells may comprise a second subset of peripheral cells. The first subset of peripheral cells may comprise a first row of cells. The first subset of peripheral cells may comprise a first column of cells.

[00105] In some embodiments, the first row of cells of the first subset of peripheral cells and the first column of cells of the first subset of peripheral cells comprise a cell in common.

[00106] In some embodiments, the second subset of peripheral cells comprises a second row of cells. In some embodiments, the second subset of peripheral cells comprises a second column of cells, n some embodiments, the second row of cells of the second subset of peripheral cells and the second column of cells of the second subset of peripheral cells comprise a cell in common.

[00107] In some embodiments, one or more peripheral cell has a wall in common with one or more other peripheral cell.

[00108] In some embodiments, at least one of the walls is a wall of a first peripheral cell and a second peripheral cell.

[00109] In some embodiments, one or more of the peripheral cells has a wall in common with one or more other peripheral cell. [00110] In some embodiments, the first cell openings of the peripheral cells of the first subset of peripheral cells are coplanar. In some embodiments, the first cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the first cell opening of one or more of the internal cells. In some embodiments, the first cell opening of one or more of the peripheral cells of the first subset of peripheral cells are axially offset from the first cell opening of one or more of the other peripheral cells of the first subset of peripheral cells.

[00111] In some embodiments, the cells each comprise a second cell opening, the second cell opening being at the second cell end of the respective cell.

[00112] In some embodiments, the second cell openings of the peripheral cells of the first subset of peripheral cells are coplanar. In some embodiments, the second cell opening of one or more of the peripheral cells of the first subset of peripheral cells is axially offset from the second cell opening of one or more of the other peripheral cells of the first subset of peripheral cells. In some embodiments, the second cell openings of the peripheral cells of the first subset of peripheral cells are coplanar with the second cell openings of one or more of the internal cells. In some embodiments, the second cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the second cell openings of one or more of the internal cells. In some embodiments, the second cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the second cell openings of a plurality of the internal cells.

[00113] In some embodiments, the first cell openings of the peripheral cells of the second subset of peripheral cells are coplanar. In some embodiments, the first cell openings of the peripheral cells of the second subset of peripheral cells are coplanar with the first cell openings of the internal cells. In some embodiments, the first cell opening of one or more of the peripheral cells of the second subset of peripheral cells is axially offset from the first cell opening of one or more other peripheral cells of the second subset of peripheral cells.

[00114] In some embodiments, the second cell openings of the peripheral cells of the second subset of peripheral cells are axially offset from the second cell opening of one or more of the internal cells. In some embodiments, the second cell openings of the peripheral cells of the second subset of peripheral cells are axially offset from the second cell opening of one or more of the peripheral cells of the first subset of peripheral cells.

[00115] In some embodiments, the formwork comprises an anchor. The anchor may extend from one of the walls that defines a boundary of a peripheral cell. The anchor may extend in a lateral direction, from a first lateral end that is at the wall from which the anchor extends, to a second lateral end, the second lateral end being a free end of the anchor. The anchor may extend in the axial direction, from a first axial end to a second axial end, the second axial end being a second free end of the anchor. [00116] In some embodiments, a lateral dimension of the anchor changes from a minimum lateral dimension at or near the first axial end, to a maximum lateral dimension at an intermediate axial point of the anchor.

[00117] In some embodiments, the intermediate axial point is coplanar with the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends. In some embodiments, the intermediate axial point is axially offset with respect to the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends.

[00118] In some embodiments, the lateral dimension of the anchor changes from the maximum dimension at the intermediate axial point, to an intermediate dimension at the second axial end of the anchor. The intermediate dimension may be less than the maximum dimension.

[00119] In some embodiments, the anchor extends from its respective wall, towards one or more other walls of the formwork.

[00120] In some embodiments, the anchor extends through the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends.

[00121] In some embodiments, the second axial end of the anchor is further away from the first cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends, than it is from the second cell opening of that peripheral cell.

[00122] In some embodiments, the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends, is between the second axial end of the anchor and the first cell opening of that peripheral cell.

[00123] In some embodiments, the anchor extends away from the walls of the formwork.

[00124] In some embodiments, the formwork comprises at least one anchor for more than one peripheral cell of the second subset of peripheral cells.

[00125] In some embodiments, the formwork comprises two anchors for each of a plurality of the peripheral cells. The formwork may comprise two anchors for each of a plurality of the peripheral cells of the second subset of peripheral cells. The formwork may comprise two anchors for each of a plurality of the peripheral cells of the first subset of peripheral cells.

[00126] In some embodiments, one anchor extends, collectively, from the walls that define at least part of a boundary of the cell in common between the second row of cells and the second column of cells of the second subset of peripheral cells.

[00127] In some embodiments, the formwork is symmetrical about an axis of symmetry. The axis of symmetry may bisect the cell in common between the first row of cells of the first subset of peripheral cells and the first column of cells of the first subset of peripheral cells. The axis of symmetry may bisect the cell in common between the second row of cells of the second subset of peripheral cells and the second column of cells of the second subset of peripheral cells.

[00128] In some embodiments, a wall thickness to cell dimension ratio, along a row of cells, is the same as a wall thickness to cell dimension ratio, along a column of cells. In some embodiments, the row of cells and the column of cells have a cell in common. [00129] In some embodiments, the formwork comprises a repeated cell structure in which an octagonal cell is adjacent to a rectangular cell.

[00130] In some embodiments, one or more octagonal cells are adjacent to two or more rectangular cells.

[00131] In some embodiments, there is provided a formwork. The formwork may comprise a plurality of walls. The walls may define a plurality of cells. Each cell may extend from a first cell opening to a second cell end. The plurality of cells may comprise a plurality of peripheral cells. The plurality of cells may comprise a plurality of internal cells.

[00132] In some embodiments, each cell extends from the first cell opening of the cell to the second cell end of the cell, in an axial direction.

[00133] In some embodiments, the peripheral cells define at least part of a peripheral portion of the formwork. In some embodiments, the internal cells define at least part of an internal portion of the formwork. In some embodiments, the peripheral portion of the formwork at least partially surrounds the internal portion of the formwork.

[00134] In some embodiments, the first cell opening and the second cell end of the peripheral cells are closer together than the first cell opening and the second cell end of one or more of the internal cells.

[00135] In some embodiments, an axial dimension of one or more of the peripheral cells is less than an axial dimension of one or more of the internal cells.

[00136] In some embodiments, the axial dimension of a particular cell is a shortest distance, measured in the axial direction, between the first cell opening and the second cell end of the particular cell.

[00137] In some embodiments, the plurality of peripheral cells comprises a first subset of peripheral cells. That is, the peripheral cells may comprise a first subset of peripheral cells. In some embodiments, the plurality of peripheral cells comprises a second subset of peripheral cells. That is, the peripheral cells may comprise a second subset of peripheral cells. The first subset of peripheral cells and the second subset of peripheral cells are mutually exclusive. That is, there are no cells in common between the first subset of peripheral cells and the second subset of peripheral cells.

[00138] In some embodiments, the first subset of peripheral cells comprises a first row of cells. In some embodiments, the first subset of peripheral cells comprises a first column of cells.

[00139] In some embodiments, the first row of cells and the first column of cells comprise a cell in common.

[00140] In some embodiments, the first cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the first cell opening of one or more of the internal cells.

[00141] In some embodiments, the first cell openings of the peripheral cells of the first subset of peripheral cells are coplanar. [00142] In some embodiments, the first cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the first cell opening of one or more of the peripheral cells of the second subset of peripheral cells.

[00143] In some embodiments, the cells each comprise a second cell opening, the second cell opening of a cell being at the second cell end of the respective cell.

[00144] In some embodiments, the second cell openings of the peripheral cells of the first subset of peripheral cells are coplanar. In some embodiments, the second cell openings of the peripheral cells of the first subset of peripheral cells are coplanar with the second cell openings of one or more of the internal cells.

[00145] In some embodiments, the second cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the second cell openings of the peripheral cells of the second subset of peripheral cells.

[00146] In some embodiments, the second cell openings of the peripheral cells of the second subset of peripheral cells are axially offset from the second cell opening of one or more of the internal cells. In some embodiments, the second cell openings of the peripheral cells of the second subset of peripheral cells are axially offset from the second cell opening of one or more of the peripheral cells of the first subset of peripheral cells.

[00147] In some embodiments, the second subset of peripheral cells comprises a second row of cells. In some embodiments, the second subset of peripheral cells comprises a second column of cells. In some embodiments, the second row of cells and the second column of cells comprise a cell in common.

[00148] In some embodiments, the first row of cells is parallel to the second row of cells. In some embodiments, the first column of cells is parallel to the second column of cells.

[00149] In some embodiments, one or more peripheral cell has a wall in common with one or more other peripheral cell.

[00150] In some embodiments, at least one of the walls is a wall of a first peripheral cell and a second peripheral cell.

[00151] In some embodiments, the second cell opening of one or more of the peripheral cells is smaller than the first cell opening of the respective peripheral cell.

[00152] In some embodiments, the second cell opening of one or more of the internal cells is smaller than the first cell opening of the respective cell.

[00153] In some embodiments, the formwork further comprises a cantilever wall that defines at least part of a particular cell of the plurality of cells.

[00154] In some embodiments, the cantilever wall extends orthogonally away from an axial wall of the formwork.

[00155] In some embodiments, the cantilever wall defines the second cell opening of the particular cell.

[00156] In some embodiments, the formwork comprises a plurality of cantilever walls. [00157] In some embodiments, one or more of the cantilever walls is parallel with another of the cantilever walls.

[00158] In some embodiments, at least some of the cells are arranged into a plurality of rows and a plurality of columns.

[00159] In some embodiments, a shape of the cells in a particular row is the same as the shape of the other cells in that row.

[00160] In some embodiments, the plurality of rows comprises alternating rows of cells of a first shape and cells of a second shape.

[00161] In some embodiments, the first shape is octagonal. In some embodiments, the second shape is rectangular.

[00162] In some embodiments, the peripheral cells are octagonal.

[00163] In some embodiments, a volume of one or more of the peripheral cells is less than a volume of one or more of the internal cells. In some embodiments, a volume of one or more of the peripheral cells is greater than a volume of one or more of the internal cells.

[00164] In some embodiments, the plurality of cells comprises one or more connecting cells. In some embodiments, the connecting cells are configured to receive part of a second formwork, thereby inhibiting movement between the formwork and the second formwork in at least one direction.

[00165] In some embodiments, the connecting cells are circular.

[00166] In some embodiments, the one or more connecting cells are defined, at least in part, by walls that also define at least part of one or more peripheral cells of the first subset of peripheral cells.

[00167] In some embodiments, the first cell openings of the one or more connecting cells are coplanar with one or more of the first cell openings of the peripheral cells of the first subset of peripheral cells.

[00168] In some embodiments, the formwork further comprises one or more projections. The one or more projections being configured to cooperate with another formwork to inhibit relative movement between the formwork and the other formwork.

[00169] In some embodiments, each of the one or more projections is configured to fit within a corresponding connecting cell of the other formwork.

[00170] In some embodiments, a shape of one or more of the projections is such that it can be received within a volume that has the same dimensions as one or more of the connecting cells. [00171] In some embodiments, the one or more projections project outwardly from one or more of the walls defining the peripheral cells of the second subset of peripheral cells.

[00172] In some embodiments, the one or more projections project away from the first openings of the peripheral cells of the second subset of peripheral cells.

[00173] In some embodiments, the first subset of peripheral cells and the second subset of peripheral cells are mutually exclusive. [00174] In some embodiments, the walls defining one or more of the peripheral cells form a closed loop. In some embodiments, the walls defining one or more of the peripheral cells form an open loop.

[00175] In some embodiments, the formwork further comprises an anchor. The anchor may extend from one of the walls that defines a boundary of a peripheral cell. The anchor may extend in a lateral direction, from a first lateral end that is at the wall from which the anchor extends, to a second lateral end, the second lateral end being a free end of the anchor. The anchor may extend in the axial direction, from a first axial end to a second axial end, the second axial end being a second free end of the anchor.

[00176] In some embodiments, a lateral dimension of the anchor changes from a minimum lateral dimension at or near the first axial end, to a maximum lateral dimension at an intermediate axial point of the anchor.

[00177] In some embodiments, the intermediate axial point is coplanar with the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends.

[00178] In some embodiments, the lateral dimension of the anchor changes from the maximum dimension at the intermediate axial point, to an intermediate dimension at the second axial end of the anchor, the intermediate dimension being less than the maximum dimension.

[00179] In some embodiments, the anchor extends from its respective wall, towards one or more other walls of the formwork.

[00180] In some embodiments, the anchor extends through the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends.

[00181] In some embodiments, the second axial end of the anchor is further away from the first cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends, than it is from the second cell opening of that peripheral cell.

[00182] In some embodiments, the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends, is between the second axial end of the anchor and the first cell opening of that peripheral cell.

[00183] In some embodiments, the anchor extends away from the walls of the formwork.

[00184] In some embodiments, the formwork comprises at least one anchor for more than one peripheral cell of the second subset of peripheral cells.

[00185] In some embodiments, the formwork comprises two anchors for each of a plurality of the peripheral cells of the second subset of peripheral cells.

[00186] In some embodiments, an anchor extends, collectively, from the walls that define at least part of a boundary of the cell in common between the second row of cells of the second subset of peripheral cells and the second column of cells of the second subset of peripheral cells. In some embodiments, one anchor extends, collectively, from the walls that define at least part of a boundary of the cell in common between the second row of cells of the second subset of peripheral cells and the second column of cells of the second subset of peripheral cells. [00187] In some embodiments, the formwork is symmetrical about an axis of symmetry. The axis of symmetry may bisect the cell in common between the first row of cells of the first subset of peripheral cells and the first column of cells of the first subset of peripheral cells. The axis of symmetry may bisect the cell in common between the second row of cells of the second subset of peripheral cells and the second column of cells of the second subset of peripheral cells.

[00188] In some embodiments, a wall thickness to cell dimension ratio, along a row of cells, is the same as a wall thickness to cell dimension ratio, along a column of cells. In some embodiments, the row of cells and the column of cells have a cell in common.

[00189] In some embodiments, the formwork comprises a repeated cell structure in which an octagonal cell is adjacent to a rectangular cell. In some embodiments, one or more octagonal cells are adjacent to two or more rectangular cells. In some embodiments, the formwork is a permanent formwork.

[00190] In some embodiments, there is provided a pavement comprising the formwork.

BRIEF DESCRIPTION OF THE DRAWINGS

[00191] Embodiments of the present disclosure are described further below, by way of example only, with reference to the accompanying Drawings, of which:

Figure 1 is a cross-section of a conventional construction of a flexible pavement, showing different courses of material;

Figure 2 is a cross-section of a conventional construction of a rigid pavement, showing different courses of material;

Figure 3 is a cross-section of a conventional construction of a flexible pavement, showing a distribution of a load applied on the flexible pavement by a wheel of a vehicle;

Figure 4 shows a cross-section of a conventional construction of a rigid pavement, showing a distribution of a load applied on the rigid pavement by a wheel of a vehicle;

Figure 5 shows a perspective view of a formwork, according to some embodiments;

Figure 5A shows the perspective view of Figure 5, with a first subset of peripheral cells and a second subset of peripheral cells identified, according to some embodiments;

Figure 6 shows the perspective view of Figure 5, with a first perspective view region, a second perspective view region, a third perspective view region and a fourth perspective view region identified, according to some embodiments;

Figure 7 shows the first perspective view region identified in Figure 6, according to some embodiments;

Figure 8 shows the second perspective view region identified in Figure 6, according to some embodiments;

Figure 9 shows an alternative perspective view of a portion of the formwork, according to some embodiments; Figure 10 shows the third perspective view region identified in Figure 6, according to some embodiments;

Figure 11 shows the fourth perspective view region identified in Figure 6, according to some embodiments;

Figure 12 shows a perspective view of another portion of the formwork, according to some embodiments;

Figure 13 shows another perspective view of the formwork, according to some embodiments;

Figure 14 shows the perspective view of Figure 13, with a fifth perspective view region, a sixth perspective view region, a seventh perspective view region and an eighth perspective view region identified, according to some embodiments;

Figure 15 shows the fifth perspective view region identified in Figure 14, according to some embodiments;

Figure 16 shows the sixth perspective view region identified in Figure 14, according to some embodiments;

Figure 17 shows the seventh perspective view region identified in Figure 14, according to some embodiments;

Figure 18 shows the eighth perspective view region identified in Figure 14, according to some embodiments;

Figure 19 shows a top view of the formwork, with a first top view region, a second top view region, a third top view region and a fourth top view region identified, according to some embodiments;

Figure 20 shows the first top view region identified in Figure 19, with a first section plane identified, according to some embodiments;

Figure 21 shows a plan view of the first section plane, according to some embodiments;

Figure 22 shows the second top view region identified in Figure 19, according to some embodiments;

Figure 23 shows the third top view region identified in Figure 19, according to some embodiments;

Figure 24 shows the fourth top view region identified in Figure 19, with a second section plane identified, according to some embodiments;

Figure 25 shows a plan view of the second section plane, according to some embodiments;

Figure 26 shows a front view of the formwork, with a first front view region and a second front view region identified, according to some embodiments;

Figure 27 shows a first side view of the formwork, with a first side view region and a second side view region identified, according to some embodiments; Figure 28 shows a rear view of the formwork, with a first rear view region and a second rear view region identified, according to some embodiments;

Figure 29 shows a second side view of the formwork, with a third side view region and a fourth side view region identified, according to some embodiments;

Figure 30 shows the first front view region, according to some embodiments;

Figure 31 shows the second front view region, according to some embodiments;

Figure 32 shows the first side view region, according to some embodiments;

Figure 33 shows the second side view region, according to some embodiments;

Figure 34 shows the first rear view region, according to some embodiments;

Figure 35 shows the second rear view region, according to some embodiments;

Figure 36 shows the third side view region, according to some embodiments;

Figure 37 shows the fourth side view region, according to some embodiments;

Figure 38 shows a bottom view of the formwork, according to some embodiments;

Figure 39 shows a perspective view of another embodiment of the formwork, according to some embodiments;

Figure 40 shows a top view of the formwork of Figure 39, according to some embodiments, in which a section plane is identified;

Figure 41 shows a magnified perspective view of a portion of the formwork of Figure 39, according to some embodiments;

Figure 42 shows another perspective view of the formwork of Figure 39, according to some embodiments;

Figure 43 shows a bottom perspective view of the formwork of Figure 39, according to some embodiments;

Figure 44 shows a magnified view of the section plane identified in Figure 40, according to some embodiments;

Figure 45 shows a perspective view of the formwork, when sectioned at the section plane identified in Figure 40, according to some embodiments;

Figure 46 shows a plurality formworks manufactured in accordance with the formwork of Figure 39, with arrows indicating how the formworks can be connected together, according to some embodiments;

Figure 47 shows a plurality of formworks manufactured in accordance with the formwork of Figure 5, with arrows indicating how the formworks can be connected together to form a portion of a curved path, according to some embodiments; and

Figure 48 shows a perspective view of a connecting cell of the formwork of Figure 39, according to some embodiments. DETAILED DESCRIPTION

[00192] The present disclosure relates to a formwork. The formwork is configured to be used in the construction of a path. In other words, the formwork is for use in construction of a path. The path may be in the form of a pavement. The formwork may therefore be said to be for use in construction of a pavement. A path as described herein includes any trafficable structure, material and/or substance that is positioned on an area that is intended to sustain vehicular or foot traffic. For example, paths include, but are not limited to, footpaths, cycle paths, roads, rail track beds, parking lots and runways. The path may include any suitable surface course. The surface course may comprise one or more of a cementitious material, bituminous material and a granular fill material. For the purposes of this disclosure, a path may be referred to as a pavement.

[00193] A path may be constructed using the formwork disclosed herein. A plurality of formworks, one or more of which being in the form of the formwork disclosed herein, can be used in the construction of the path. To construct the path, the formworks are installed in place and a fill material is provided over the formworks.

[00194] The formwork of the present disclosure comprises a plurality of walls. The walls define a plurality of cells. Each cell extends in an axial direction from a first cell opening to a second cell end. The formwork comprises a plurality of peripheral cells that define at least part of a peripheral portion of the formwork. Specifically, some of the walls that define the plurality of peripheral cells define at least part of a periphery of the formwork. The formwork comprises a plurality of internal cells that are within the peripheral portion of the formwork. An axial dimension of one or more of the peripheral cells is less than an axial dimension of one or more of the internal cells. In this way, the formwork can be connected to multiple other formworks, with the peripheral cells of each adjacent formwork overlapping. This overlap is enabled by the smaller axial dimension of the peripheral cells. The cells of the formwork may be filled with a fill material, which fills the peripheral cells of adjacent formworks.

[00195] When forces are applied on the formwork and/or the fill material such that the formwork is urged in a lateral direction, the walls forming the peripheral cells of the formwork, and corresponding walls on another formwork that overlaps with the peripheral cells of the formwork, may act to compress the fill material within the peripheral cells. By being configured to cooperate with adjacent formworks to compress the fill material within the peripheral cells in response to applied loads, the formwork enables the utilisation of the compressive strength of the fill material, thereby improving the structural integrity of the pavement formed using the formwork. In some embodiments, the fill material is concrete. The walls of the formwork are also dimensioned so as to accommodate the expansion and compression of the fill material, thereby reducing or eliminating the need for expansion gaps in the path.

[00196] Anchors extend from the walls defining a subset of the peripheral cells of the formwork. The anchors, when embedded within the fill material (such as concrete), inhibit relative movement between the formwork and the fill material. The anchors also inhibit relative movement between adjacent formworks. In this way, the anchors can reduce the likelihood of movement of adjacent formworks and/or the fill material without or around the peripheral cells. This can reduce the likelihood of cracking of the fill material.

Flexible Pavement 2

[00197] Figure 1 shows a flexible pavement 2. The flexible pavement 2 is constructed using a conventional construction method. The flexible pavement 2 comprises a surface course 4, a base course 6 and a sub-base 8 provided on top of a subgrade 10. It will be understood that the sub-base 8 may be optional. Figure 2 shows a rigid pavement 12. The rigid pavement 12 is constructed using a conventional construction method. The rigid pavement 12 comprises a surface course 14, a base course 16 and a sub-base 18 provided on top of a subgrade 20. It will be understood that the sub-base 18 may be optional.

[00198] Figure 3 shows a typical load 24 applied to a conventionally constructed flexible pavement 22. Figure 3 also shows a distribution 26 of this load 24 into a base course 28 or other subjacent course of the flexible pavement 22. Figure 4 shows a typical load 34 applied to a conventionally constructed rigid pavement 32. Figure 4 also shows a distribution 36 of this load 34 into a base course 38 or other subjacent course of the rigid pavement 32.

Formwork 100

[00199] Figures 5 to 38 show a formwork 100, according to some embodiments of the disclosure.

[00200] Figures 5 and 6 show a perspective view of the formwork 100. The perspective view of Figures 5 and 6 may be considered a first perspective view. The perspective view of Figures 5 and 6 may be referred to as an upper perspective view. A first perspective view region 160 is identified in Figure 6. A second perspective view region 162 is identified in Figure 6. A third perspective view region 164 is identified in Figure 6. A fourth perspective view region 166 is identified in Figure 6. Figure 7 shows a magnified view of the first perspective view region 160. Figure 8 shows a magnified view of the second perspective view region 162. Figure 9 shows another magnified perspective view of the formwork 100, showing at least part of the second perspective region 162 from a different viewing angle to Figure 8. Figure 10 shows a magnified view of the third perspective view region 164. Figure 11 shows a magnified view of the fourth perspective view region 166. Figure 12 shows a magnified perspective view of an inner region of the formwork 100.

[00201] Figures 13 and 14 show another perspective view of the formwork 100. The perspective view of Figures 13 and 14 may be considered a second perspective view. The perspective view of Figures 13 and 14 may be referred to as a lower perspective view. A fifth perspective view region 168 is identified in Figure 14. A sixth perspective view region 170 is identified in Figure 14. A seventh perspective view region 172 is identified in Figure 14. An eighth perspective view region 174 is identified in Figure 14. Figure 15 shows a magnified view of the fifth perspective view region 168. Figure 16 shows a magnified view of the sixth perspective view region 170. Figure 17 shows a magnified view of the seventh perspective view region 172. Figure 18 shows a magnified view of the eighth perspective view region 174.

[00202] Figure 19 shows a top view of the formwork 100. A first top view region 176 is identified in Figure 19. A first section plane 177 is identified in Figure 19. A second top view region 178 is identified in Figure 19. A third top view region 180 is identified in Figure 19. A fourth top view region 182 is identified in Figure 19. A second section plane 183 is identified in Figure 19. Figure 20 shows a magnified view of the first top view region 176. Figure 21 shows the first section plane 177. Figure 22 shows a magnified view of the second top view region 178. Figure 23 shows a magnified view of the third top view region 180. Figure 24 shows a magnified view of the fourth top view region 182. Figure 25 shows the second section plane 183.

[00203] Figure 26 shows a front view of the formwork 100. A first front view region 184 is identified in Figure 26. A second front view region 186 is identified in Figure 26. Figure 30 shows a magnified view of the first front view region 184. Figure 31 shows a magnified view of the second front view region 186.

[00204] Figure 27 shows a first side view of the formwork 100. The first side view may be considered a right side view. A first side view region 188 is identified in Figure 27. A second side view region 190 is identified in Figure 27. Figure 32 shows a magnified view of the first side view region 188. Figure 33 shows a magnified view of the second side view region 190.

[00205] Figure 28 shows a rear view of the formwork 100. A first rear view region 192 is identified in Figure 28. A second rear view region 194 is identified in Figure 28. Figure 34 shows a magnified view of the first rear view region 192. Figure 35 shows a magnified view of the second rear view region 194.

[00206] Figure 29 shows a second side view of the formwork 100. The second side view may be considered a left side view. A third side view region 196 is identified in Figure 29. A fourth side view region 198 is identified in Figure 29. Figure 36 shows a magnified view of the third side view region 196. Figure 37 shows a magnified view of the fourth side view region 198. [00207] Figure 38 shows a bottom view of the formwork 100.

[00208] The formwork 100 comprises a body 109. The formwork 100 may be said to be in the form of a body 109. The formwork 100 extends along a first axis 141 (see Figure 26). The first axis 141 may be referred to as an axial axis. An axial direction 110 of the formwork 100 is parallel to the first axis 141 . The formwork 100 extends from a first end 111 to a second end 113. The formwork 100 extends from the first end 106 to the second end 113 in the axial direction 110. The body 109 may be said to extend from the first end 111 to the second end 113. The first end 111 may be referred to as an upper end of the formwork 100. The second end 113 may be referred to as a lower end of the formwork 100. The formwork 100 has a first end face 115 and its first end 111. The first end face 115 is planar. The formwork 100 has a second end face 117 at its second end 113. The second end face 117 is planar. An area of the second end face 1 17 is greater than an area of the first end face 115. A distance between the first end 1 11 and the second end 113 of the formwork 100 may be referred to as a height of the formwork 100.

[00209] The formwork 100 extends along a second axis 173 (see Figure 19). The second axis 173 may be referred to as a first lateral axis. A first lateral direction 201 of the formwork 100 is parallel to the second axis 173. The formwork 100 extends from a first lateral end 181 to a second lateral end 219 (see Figure 19). The formwork 100 extends from the first lateral end 181 to the second lateral end 219 in the first lateral direction 201 . A distance between the first lateral end 181 and the second lateral end 219 of the formwork 100, measured in the first lateral direction 201 , may be referred to as a width of the formwork 100.

[00210] The formwork 100 extends along a third axis 175 (see Figure 19). The third axis 175 may be referred to as a second lateral axis. A second lateral direction 179 of the formwork 100 is parallel to the third axis 175. The formwork 100 extends from a third lateral end 185 to a fourth lateral end 187. The formwork 100 extends from the third lateral end 185 to the fourth lateral end 187 in the second lateral direction 179. A distance between the third lateral end 185 and the fourth lateral end 187, measured in the second lateral direction 179, may be referred to as a length of the formwork 100. The length of the formwork 100 is equal to the width of the formwork 100. The height of the formwork 100 is less than the length of the formwork 100. The height of the formwork 100 is less than the width of the formwork 100.

[00211] The first axis 141 is orthogonal to the second axis 173. The first axis 141 is orthogonal to the third axis 175. The second axis 173 is orthogonal to the third axis 175.

[00212] The formwork 100 comprises walls 102. The formwork 100 comprises a number of walls 102. In particular, the formwork 100 comprises a plurality of walls 102. The walls 102 may be referred to collectively as the body 109 of the formwork 100. That is, the formwork 100 comprises a body 109, the body 109 comprising the walls 102. The walls 102 may be referred to collectively as a wall structure. That is, the formwork 100 may comprise a wall structure, the wall structure comprising the walls 102.

[00213] The formwork 100 comprises openings 101. Specifically, the formwork 100 defines the openings 101 . The body 109 of the formwork 100 defines the openings 101 . The walls 102 define the openings 101 . The formwork 100 comprises a plurality of openings 101. That is, the formwork 100 defines the plurality of openings 101 . An opening 101 is defined between points on one or more of the walls 102. The openings 101 may be referred to as openings 101 of the formwork 100.

[00214] The formwork 100 comprises cells 104. In particular, the formwork 100 comprises a plurality of cells 104. The cells 104 may be referred to as cells 104 of the formwork 100. The walls 102 define the cells 104. In particular, the walls 102 define the plurality of cells 104. Each cell 104 is defined by a number of the walls 102. Each cell 104 is defined by one or more walls 102. Each of a plurality of the cells 104 are defined by a plurality of the walls 102. Some walls

102 define part of more than one cell 104.

[00215] The cells 104 may be considered to be volumes defined by the walls 102. In particular, the walls 102 define boundaries of the cells 104.

[00216] One or more of the cells 104 may be considered to be a volume defined, at least partly, by respective walls 102. A wall 102 may be considered a boundary of a cell 104. A wall 102 may be said to define a boundary of a cell 104. One or more of the cells 104 may be considered to be a volume defined by respective walls 102.

[00217] One or more of the cells 104 may be defined, at least in part, by one or more of the openings 101 . That is, an opening 101 may be considered to define a boundary of a cell 104. Alternatively, an opening 101 may be a boundary of a cell 104.

[00218] One or more of the cells 104 may be defined, in part, by walls 102, and in part, by one or more of the openings 101 formed by these walls 102. That is, the boundaries of a cell 104 are formed by one or more walls 102 and one or more openings 101 of the formwork 100. Some of the boundaries of a cell 104 may be formed by the walls 102. Some of the boundaries of a cell 104 may be formed by the openings 101. It will be appreciated that as the walls 102 define the openings 101 , the boundaries of the cells 104 may simply be said to be defined by the walls 102.

[00219] In the illustrated case, each cell 104 may be considered to be defined by number of the walls 102 and by a number of openings 101 defined by these walls 102. The walls 102 may be considered to be boundaries of the cell 104. Each wall 102 may be considered to be, or to define, a boundary of the cell 104. The openings 101 may be considered to be boundaries of the cell 104. Each opening 101 may be considered to be, or to define, a boundary of the cell 104. The openings 101 may be referred to as openings 101 of a cell 104. The openings 101 may be referred to as cell openings.

[00220] Each cell 104 may be said to have a shape. Thus, each cell 104 has a shape. The shape of a cell 104 is the shape of the volume that is defined by the walls 102 that define the cell 104 and the openings 101 defined by those walls 102. The shape of each cell 104 is three- dimensional.

[00221] One or more of the cells 104 is octagonal. In the illustrated embodiment, a plurality of the cells 104 are octagonal. Specifically, the shape of one or more of the cells 104 is at least partially an octagonal prism. The octagonal prism may have rounded corners. The octagonal prism may have a curved wall portion. The shape of one or more of the cells 104 may be in the form of two connected octagonal prisms, one being larger than the other. Such a cell 104 may still be considered to be octagonal. In the illustrated embodiment, the shape of a plurality of the cells 104 is in the form of two connected octagonal prisms. It will be appreciated that in some embodiments, one or more of the cells 104 could take a different shape. [00222] One or more of the cells 104 is rectangular. In the illustrated embodiment, a plurality of the cells 104 are rectangular. Specifically, the shape of one or more of the cells 104 is at least partially a rectangular prism. The rectangular prism may have rounded corners. The shape of one or more of the cells 104 may be in the form of two connected rectangular prisms, one being larger than the other. Such a cell 104 may still be considered to be rectangular. In the illustrated embodiment, the shape of a plurality of the cells 104 is in the form of two connected rectangular prisms. It will be appreciated that in some embodiments, one or more of the cells 104 could take a different shape.

[00223] One or more of the cells 104 is circular. In the illustrated embodiment, a plurality of the cells 104 are circular. Specifically, the shape of one or more of the cells 104 is at least partially a cylinder. The shape of one or more of the cells 104 may be in the form of two connected cylinders, one being larger than the other. That is, one of the cylinders may have a radius that is larger than the other cylinder. Such a cell 104 may still be considered to be cylindrical. It will be appreciated that in some embodiments, one or more of the cells 104 could take a different shape.

[00224] The formwork 100 comprises a repeated cell structure. That is, a plurality of the walls 102 defining cells 104 form a cell structure that is repeated across at least a portion of the formwork 100. The repeated cell structure comprises a cell of a first shape that is adjacent to a cell of a second shape. The cell of the first shape may share a wall with the cell of a second shape. That is, the cell of the first shape and the cell of the second shape have a wall in common. The cell of the first shape and the cell of the second shape may have more than one wall in common. The first shape may be an octagon. The first shape may alternatively be a triangle, rectangle, pentagon, hexagon or a heptagon. The first shape may be triangular, rectangular, pentagonal, hexagonal, octagonal or heptagonal. The first shape may have rounded corners. The first shape may have one or more curved sides. The first shape may have a plurality of curved sides. It will be understood that the first shape may be a shape of a planar cross section of the cell of the first shape, at one or more heights of the cell. The second shape may be a rectangle. The second shape may alternatively be a triangle, pentagon, hexagon, octagon or a heptagon. The second shape may be triangular, rectangular, pentagonal, hexagonal, octagonal or heptagonal. The second shape may have rounded corners. The second shape may have one or more curved sides. The second shape may have a plurality of curved sides. It will be understood that the second shape may be a shape of a planar cross section of the cell of the second shape, at one or more heights of the cell.

[00225] Referring to Figures 19 and 40, the formwork 100 described herein comprises an octagonal cell 104 adjacent to a rectangular cell 104. That is, the formwork 100 comprises a repeated cell structure in which an octagonal cell 104 is adjacent to a rectangular cell 104. The cell of the first shape may be the octagonal cell 104. The cell of the second shape may be the rectangular cell 104. This cell structure is found in the internal cells 140. That is, the walls 102 that define the internal cells 104 define a cell structure in which an octagonal cell is adjacent to a rectangular cell. The octagonal cell and the rectangular cell share a wall 102. That is, a common wall 102 defines part of the octagonal cell and part of the rectangular cell. The cell structure is also present across a boundary between the peripheral cells 130 and the internal cells 104. Specifically, the peripheral cells 104 are octagonal. A number of the internal cells 140 that are adjacent to the peripheral cells 130 (i.e. that share a common wall 102), together with associated peripheral cells 130, define the repeated cell structure. The octagonal peripheral cells 130 define one cell of the cell structure. The rectangular internal cells 140 define another cell of the cell structure.

[00226] Expressed in another way, an internal cell 140 of the plurality of internal cells 140 is adjacent to four octagonal cells. One or more of these octagonal cells may be a peripheral cell 130. Two or more of these octagonal cells may be another internal cell 140. An internal cell 140 of the plurality of internal cells 140 is also adjacent to four rectangular cells 104. Each of these rectangular cells 104 is an internal cell 140. One or more of the rectangular cells 104 are adjacent to a plurality of octagonal cells. Specifically, each rectangular cell 104 is adjacent to four octagonal cells 104. One or more of these octagonal cells 104 may be peripheral cells 130. Two or more of these octagonal cells 104 may be peripheral cells 130. Three of these octagonal cells may be peripheral cells 130. One or more of these octagonal cells may be internal cells 140. In some cases, all of these octagonal cells are internal cells 140. That is, in some cases, all four of the octagonal cells that are adjacent to a rectangular cell are internal cells 140. [00227] The formwork 100 comprises a plurality of axial walls 107. The walls 102 comprise the axial walls 107. The formwork 100 comprises a plurality of cantilever walls 103. The walls 102 comprise the cantilever walls 103. The cantilever walls 103 extend in a direction that is transverse to the axial walls 107. Specifically, the cantilever walls 103 are orthogonal to the axial walls 107. The axial walls 107 extend orthogonally with respect to the cantilever walls 103. That is, the cantilever walls 103 form cantilevers with respect to the axial walls 107. One or more of the cells 104 is defined, at least in part, by a plurality of axial walls 107. One or more of the cells 104 is defined, at least in part, by one or more cantilever wall 103. The cantilever walls 103 defining part of a cell 104 meet at a junction 105. The junction 105 may comprise a curved wall portion. The curved wall portion may curve along a radius. In other words, a transition from one cantilever wall 103 to an adjacent cantilever wall 103 may occur at a curved wall portion. The curved wall portion curves along a radius, measured on a plane orthogonal to the axial axis of the formwork 100.

[00228] The walls 102 comprise a first end 106 and a second end 108 (see Figure 7). One or more of the walls 102 comprises a first end 106 and a second end 108. In particular, each wall 102 comprises a first end 106 and a second end 108. The first end 106 of a wall 102 may be referred to as an upper end. The first end 106 of a wall 102 may be referred to as a first axial end. The first end 106 of a wall 102 faces upwards when the formwork 100 is in use. The second end 108 of a wall 102 may be referred to as a lower end. The second end 108 of a wall 102 may be referred to as a second axial end. The second end 108 of a wall 102 is lower than the first end 106 when the formwork 100 is in use.

[00229] A wall 102 extends from its first end 106 to its second end 108. One or more of the walls 102 extends from its first end 106 to its second end 108. In the illustrated embodiment, the walls 102 each extend from a first end 106 to a second end 108. In particular, the walls 102 extend from the first end 106 to the second end 108 in the axial direction 110 of the formwork 100. The distance between the first end 106 and the second end 108 of a wall 102, measured in the axial direction 110, may be said to be a height of the respective wall 102. A wall 102 may be referred to as an axial wall 107 if its longest dimension is in the axial direction 110. A wall 102 may be referred to as an axial wall 107 if it is longer in the axial direction 110 than at least one other direction that is orthogonal to the axial direction 110. A wall 102 may be referred to as an axial wall 107 if it is longer in the axial direction 110 than one other direction that is orthogonal to the axial direction. A wall 102 may be referred to as an axial wall 107 if it is longer in the axial direction 110 than two other directions that are orthogonal to the axial direction 110, those two other directions also being orthogonal with respect to each other. [00230] A normal plane of the formwork is orthogonal to the axial direction 110. The normal plane may bisect one or more of the cells 104. The normal plane may be referred to as a plane of the formwork 100.

[00231 ] A wall 102 comprises a first lateral end 112 and a second lateral end 114. The walls 102 comprise a first lateral end 112 and a second lateral end 114. In particular, the walls 102 each comprise a first lateral end 112 and a second lateral end 114 (see Figure 7). The walls 102 each extend from the first lateral end 112 to the second lateral end 114. A length of a wall 102 may be a distance along the wall 102, between the first lateral end 112 to the second lateral end 114 of the wall 102.

[00232] Each wall 102 extends from its first lateral end 112 to its second lateral end 114 in a first normal direction. The first normal direction is orthogonal to the axial direction 110. The first normal direction is parallel with the normal plane of the formwork 100. The first normal direction of a wall 102 is referred to as a lateral direction of that wall 102. As the walls 102 are not all aligned (i.e. some walls 102 are transverse to other walls 102, or some walls 102 are curved), the first normal direction of a particular wall 102 may be different to the first normal direction of another wall 102. The first normal direction of a wall 102 may change along the length of the wall 102. Where the respective wall 102 is straight, the first normal direction may be a straight direction. Where the respective wall 102 is curved, the first normal direction may curve along the length of the wall 102. That is, the first normal direction of a wall 102 may change along the length of the wall 102 if the wall 102 is curved. In particular, the first normal direction of a wall 102 may change as the wall 102 is traversed from its first lateral end 112 towards its second lateral end 114. The distance between the first lateral end 112 and the second lateral end 114 of a wall 102, measured along the first normal direction, may be considered the length of that wall 102. It will be appreciated that where the relevant wall 102 curves, the length of the wall 102 may be determined along the length of the curved wall 102, rather than being the straight-line distance between the first lateral end 112 and the second lateral end 114 of that wall 102.

[00233] A wall 102 may be referred to as a normal wall 102 if the length of the wall 102 is its longest dimension. Such a wall may be referred to as a cantilever wall 103. That is, a wall 102 may be referred to as a cantilever wall 103 if the wall 102 is longer in at least one direction that is orthogonal to the axial direction 110, than it is in the axial direction 110. A wall 102 may be referred to a cantilever wall 103 if the wall 102 is longer in one direction that is orthogonal to the axial direction 110, than it is in the axial direction 110. A wall 102 may be referred to as a cantilever wall 103 if the wall 102 is longer in two directions that are orthogonal to the axial direction 110, than it is in the axial direction 110, the two directions also being orthogonal. Therefore, a wall 102 may be referred to as a cantilever wall 103 if the wall 102 is longer in at least one direction that is orthogonal to the axial direction 110, than it is in the axial direction 110. In other words, a wall 102 may be referred to as a cantilever wall 103 if the length of the wall 102 in the axial direction 110 is not its longest length.

[00234] Throughout this description, the term “transverse” may be interpreted as non-parallel. That is, a straight line is transverse to a plane when the straight line is not parallel to the plane. In such a case, the straight line will intersect the plane at one point. A first plane may be said to be transverse to a second plane when the first plane and the second plane intersect. Such planes can intersect at any angle greater than 0° and the planes will still be considered transverse. Thus, two of the walls 102 being transverse means that the relevant two walls 102 are non-parallel. The walls 102 therefore intersect at at least one point.

[00235] One or more of the walls 102 comprises a first face end 116 and a second face end 118. In particular, the walls 102 each comprise a first face end 116 and a second face end 118 (see Figure 7). The first face end 116 defines a first face of the wall 102. The second face end 118 defines a second face of the wall 102. The walls 102 each extend from the first face end 116 to the second face end 118. One or more of the walls 102 extends from its first face end 116 to its second face end 118 in a second normal direction. In particular, each wall 102 extends from the first face end 116 to the second face end 118 in the second normal direction. The second normal direction is orthogonal to the axial direction 110. The second normal direction is parallel to the normal plane of the formwork 100. The second normal direction is orthogonal to the first normal direction. In particular, the second normal direction is orthogonal to the first normal direction at a respective point along the wall 102. Where the wall 102 is straight, the first normal direction is straight and does not curve along the length of the wall 102. The second normal direction is therefore also straight. Where the wall 102 is curved, the first normal direction may curve along the length of the wall 102. In such a case, the second normal direction may rotate along the length of the wall 102. That is, the second normal direction may change along a length of the wall 102. The second normal direction at a particular point on a wall 102 is orthogonal to the first face end 116 of the wall 102 at that point. The second normal direction a particular point on a wall 102 is orthogonal to the second face end 118 of the wall 102 at that point.

[00236] One or more of the walls 102 may be said to have a wall thickness 119 (see Figure 24). The wall thickness 119 of a wall 102, at a particular height of the wall 102, is the distance between the first face end 116 and the second face end 118 of that wall 102, at that point. In other words, the wall thickness 119 of a wall 102, at a particular height of the wall 102, in the second normal direction of that wall 102. The second normal direction is a direction that extends from one face of the wall to another face of the wall. Specifically, the second normal direction is a direction that extends from the first face end 1 16 to the second face end 118 of the wall 102. The wall thickness 119 of one or more of the walls 102 is constant at different points along the wall 102 in the axial direction. That is, the wall thickness 119 of one or more of the walls 102 is the same at different heights of the wall 102. The wall thickness 119 of one or more of the walls 102 changes between different heights of the wall 102. For example, the wall thickness 119 of a wall 102 may increase as the wall 102 is traversed in the axial direction 110. Alternatively, the wall thickness 119 of a wall 102 may decrease as the wall 102 is traversed in the axial direction 1 10.

[00237] The distance between the first face end 116 and the second face end 118, measured in the second normal direction at a particular point along a wall 102, may be considered the thickness of that wall 102 at that point. A wall 102 may be referred to as a normal wall 102 if the thickness of the wall 102 is its longest dimension. Alternatively, such a wall may be referred to as a cantilever wall 103. That is, a wall 102 may be referred to as a cantilever wall 103 if the wall 102 is longer in the second normal direction, than it is in the axial direction 110. Alternatively, a wall 102 may be referred to a cantilever wall 103 if it extends in a direction that is transverse to the axial direction 110, to form a cantilever with respect to an axial wall 107. [00238] The formwork 100 comprises junctions 105. The walls 102 meet at junctions 105. Each wall 102 meets one or more other walls 102 at a junction 105. One or more of the walls 102 may meet one or more other walls 102 at one or more junctions 105. Referring to Figure 8, a number of junctions 105 are shown. Axial walls 107 meet other axial walls 107 at respective junctions 105. Axial walls 107 meet cantilever walls 103 at junctions 105. Each junction 105 may extend along a length of a number of walls 102. For example, the junction 105 at which two axial walls 107 meet may extend along at least part of the axial length of those walls 102.

Similarly, an axial wall 107 meets a cantilever wall 103 at a junction 105. The junction 105 between the axial wall 107 and the cantilever wall 103 may extend along the length of the axial wall 107 in the first normal direction of that wall 102. [00239] The walls 102 define a number of internal volumes that are at least partially bounded by the walls 102. In the illustrated embodiment, the walls 102 define a number of openings 101 , with a volume being defined by a number of the walls 102 and the openings 101 defined by those walls 102. This volume is referred to herein as a cell 104. At least part of the walls 102 that define the volume of a cell 104 may also be considered part of the cell 104. In some cases, the walls 102 that define the volume of a cell 104 may also be considered part of that cell 104. [00240] One wall 102 may define part of more than one cell 104. A wall 102 may define a portion of a boundary of more than one cell 104. For example, the first face end 116 of a wall 102 may define part of a boundary of a first cell 104. The second face end 118 of that wall 102 may define part of a boundary of a second cell 104. In such a case, these cells 104 may be considered to be adjacent to each other.

[00241] It will be understood that a cell 104 of the formwork 100 may be missing one or more walls 102, or a portion of one or more of the walls 102 that at least partially define the respective cell 104. Such a volume is still considered a cell 104 for the purposes of this description.

[00242] The formwork 100 comprises a number of inner walls 102. The inner walls 102 may be referred to as internal walls 102. Each inner wall 102 defines a boundary of more than one cell 104. The formwork 100 comprises a number of outer walls 102. The outer walls 102 may be referred to as exterior walls. The outer walls 102 may be referred to as peripheral walls. Each outer wall defines a boundary of one cell 104.

[00243] A number of the cells 104 are arranged into a plurality of rows 146 (see Figure 19). In other words, the formwork 100 comprises rows 146 of cells 104. In particular, the walls 102 define rows 146 of cells 104. The cells 104 of a particular row 146 are aligned. The cells 104 of a row 146 of cells 104 are all intersected by a straight line that extends in a direction of that row 146. A centroid of each cell 104 of a row 146 may be colinear with a centroid of other cells 104 of that row 146. In other words, a number of cells 104 are considered to form a row 146 where the centroid of each cell 104 is colinear with the centroid of the other cells 104. A cross-sectional centre of each cell 104 of a row 146 may be colinear with a cross-sectional centre of other cells 104 of that row 146. In other words, a number of cells 104 are considered to form a row 146 where the cross-sectional centre of the cells 104, at one or more points along their height, are colinear.

[00244] A number of the cells 104 are arranged into a plurality of columns 148 (see Figure 19). In other words, the formwork 100 comprises columns 148 of cells 104. In particular, the walls 102 define columns 148 of cells 104. The cells 104 of a column 148 of cells 104 are all intersected by a straight line that extends in a direction of that column 148. A centroid of each cell 104 of a column 148 may be colinear with a centroid of other cells 104 of that column 148. In other words, a number of cells 104 are considered to form a column 148 where the centroid of each cell 104 is colinear with the centroid of the other cells 104 of that column 148. A cross-sectional centre of each cell 104 of a column 148 may be colinear with a cross-sectional centre of other cells 104 of that column 148. In other words, a number of cells 104 are considered to form a column 148 where the cross-sectional centre of the cells 104, at one or more points along their height, are colinear.

[00245] The columns 148 of cells 104 extend orthogonally to the rows 146 of cells 104. In other words, the rows 146 are orthogonal to the columns 148.

[00246] Figure 19 identifies a number of rows 146 and columns 148 of the formwork 100. The rows 146 extend in a direction that is orthogonal to the axial direction 110 of the formwork 100. The columns 148 extend in a direction that is orthogonal to the axial direction 110 of the formwork 100. In figure 19, the identified rows 146 extend horizontally and columns extend vertically. It will be appreciated that the rows 146 may be considered to extend diagonally. Similarly, the columns 148 may be considered to extend diagonally.

[00247] Referring to Figure 19, the shape of the cells 104 in a particular row 146 are the same as the shape of the other cells 104 in that row 146. The plurality of rows 146 comprises alternating rows 146 of cells 104 of a first shape and cells of a second shape.

[00248] The first shape is octagonal. The first shape may be an octagonal prism. The octagonal prism may have rounded corners. The first shape may comprise connected octagonal prisms, one being larger than the other. In the illustrated embodiment, this is the case, where rows 146 of octagonal cells 104 are formed by the axial walls 107 and the cantilever walls 103.

Specifically, a group of axial walls 107 defines a volume in the shape of a first octagonal prism. A group of the cantilever walls 103 that meet these axial walls 107 at respective junctions 105 forms a volume in the shape of another octagonal prism. This octagonal prism is smaller than that formed by the axial walls 107. The two octagonal prism volumes are connected to form the octagonal cell 104.

[00249] The second shape is rectangular. The second shape may be a rectangular prism. The rectangular prism may have rounded corners. The second shape may comprise connected rectangular prisms, one being larger than the other. In the illustrated embodiment, this is the case, where rows 146 of rectangular cells 104 are formed by the axial walls 107 and the cantilever walls 103. Specifically, a group of axial walls 107 defines a volume in the shape of a first rectangular prism. A group of the cantilever walls 103 that meet these axial walls 107 at respective junctions 105 forms a volume in the shape of another rectangular prism. This rectangular prism is smaller than that formed by the axial walls 107. The two rectangular prism volumes are connected to form the rectangular cell 104.

[00250] The wall thickness 119 of one or more of the walls 102 may be about 1 mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or greaterthan 10mm. The wall thickness 119 of a wall 102 may change in the axial direction 110. For example, the wall thickness 119 of an axial wall 107 may be 2mm at the first end 106 of the axial wall 107. The wall thickness 119 of the axial wall 107 may be 2.5mm at the second end 108 of the axial wall 107. That is, the wall thickness 119 of a wall 102 may be greater at the second end 108 of the axial wall 107 than the first end 106 of that wall 107. This may be the case for one or more of the walls 102 that define a boundary of a cell 104. The wall thickness 119 a wall 102 may change along the height of the wall 102. Specifically, the wall thickness 119 of a wall 102 may increase along the height of the wall 102. The wall thickness 119 may increase as the wall 102 is traversed from the second end 108 of the wall 102, towards the first end of the wall 102. The wall thickness 119 of a wall 102 may decrease as the wall 102 is traversed from the second end 108 of the wall 102, towards the first end 106 of the wall 102. This may be the case for the axial walls 107 that define at least part of one or more of the internal cells 104. This may also be the case for the axial walls 107 that define at least part one or more peripheral cells 130. This may be the case for the axial walls 107 that define at least part of one or more of the connecting cells 150. [00251] The wall thickness 119 of one or more of the cantilever walls 103 may be about 1 mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or greater than 10mm. The wall thickness 119 of a cantilever wall 103 may be constant across its height. This dimensionality may be the case for the cantilever walls 103 that define at least part of one or more of the internal cells 104. This may also be the case for the cantilever walls 103 that define at least part one or more peripheral cells 130.

[00252] A cell 104 is characterized by a number of cell dimensions 213 (see Figures 24, 25). In other words, a cell 104 is defined by a number of cell dimension 213. The cell dimension 213 are defined by the walls 102 of the cell 104. That is, the cell dimensions 213 are defined by the walls 102 that define the boundaries of a particular cell 104. Each cell 104 is characterized by a number of cell dimensions 213. The cell dimensions 213 specify a size and shape of the cell 104. The axial dimension 126 of a cell 104 is one of these dimensions. A cell 104 also has a planar cell dimension 213A. The planar cell dimension 213A is a cell dimension 213 of the cell 104. The planar cell dimension 213 is measured in a direction that is orthogonal to the axial direction 110. The planar cell dimension 213A is measured at a particular height of the cell 104. The planar cell dimension 213A of a cell 104 may change along the height of the cell 104. That is, the planar cell dimension 213A may increase as the walls 102 defining the boundaries of a cell 104 are traversed from their second ends 108 towards their first ends 106. The planar cell dimension 213A of a cell 104 may increase as the walls 102 defining the boundaries of the cell 104 are traversed from their second ends 108 towards their first ends 106.

[00253] A cell dimension 213 of one or more of the cells 104 may be an apothem of that cell 104. As described herein, a plurality of the cells 104 are octagonal. Specifically, the peripheral cells 130 are octagonal. Similarly, a subset of the internal cells 140 are octagonal. Each of these cells 104 may have a planar cell dimension 213A that is an apothem of the cell 104, at a particular height of the cell 104. The apothem is defined by the walls 102 of the cell. The apothem may change along the height of the cell 104 (as the thickness of the walls 102 may change). [00254] The planar cell dimension 213A of a cell 104 defines a void of the cell 104. That is because the space occupied by the planar cell dimension 213A is not occupied by a wall 102. [00255] As noted above, in some cases, the rows 146 and columns 148 may be considered to extend diagonally (as represented in Figure 19). In this case, the rows 146 may comprise cells 104 of both the first shape and the second shape. The cells 104 of a particular row 146 may alternative between cells 104 of the first shape and cells 104 of the second shape. Similarly, the columns 148 may comprise cells 104 of both the first shape and the second shape. The cells 104 of a particular columns 148 may alternative between cells 104 of the first shape and cells 104 of the second shape.

[00256] Each cell 104 comprises a first cell end 120. Each cell 104 comprises a second cell end 122. Each cell 104 extends from its first cell end 120 to its second cell end 122. In particular, each cell 104 extends in the axial direction 110 from its first cell end 120 to its second cell end 122. The first cell end 120 may therefore be referred to as a first axial end of the respective cell 104. The first cell end 120 may be referred to as an upper end of the respective cell 104. Similarly, the second cell end 122 may be referred to as a second axial end of the respective cell 104. The second cell end 122 may be referred to as a lower end of the respective cell 104. One or more of the walls 102 define at least part of the first cell end 120 of each cell 104. One or more of the walls 102 define at least part of the second cell end 122 of each cell 104.

[00257] As described herein, the walls 102 define a plurality of openings 101. The openings 101 comprise a plurality of first cell openings 124. That is, the walls 102 define a plurality of first cell openings 124. The formwork 100 therefore comprises a plurality of first cell openings 124. One or more of the cells 104 comprises a first cell opening 124. In the illustrated embodiment, each ofthe cells 104 comprises a first cell opening 124. That is, the walls 102 defining a particular cell 104 define a first cell opening 124 of that cell 104. The first cell opening 124 of a particular cell 104 is an opening of that cell 104. The first cell opening 124 of a particular cell 104 is defined by the walls 102 that define at least part of that cell 104. In other words, the walls 102 that define a cell 104 define the first cell opening 124 of that cell 104. The first cell opening 124 may be considered a boundary of that cell 104. The first cell opening 124 may define a boundary of that cell 104. Therefore, in some embodiments, one or more of the cells 104 is bound by the respective first cell opening 124. The first cell opening 124 of a cell 104 is at the first cell end 120 of that cell 104.

[00258] It will be understood that it may be a subset of the walls 102 that define a particular cell 104 that define the first cell opening 124 of that cell 104. The first cell opening 124 of one or more of the cells 104 is at the first cell end 120 of the respective cell 104. The first cell opening 124 may be considered the first cell end 120 of the respective cell 104. In the illustrated embodiment, each cell 104 comprises a first cell opening 124 at its respective first cell end 120. In other words, the walls 102 that define a cell 104 define the first cell opening 124 at the first cell end 120 of that cell 104. A cell 104 therefore extends from its first cell opening 124 to its second cell end 122. The first cell opening 124 of one or more cells 104 is planar. That is, one or more of the first cell openings 124 are planar. Each cell 104 extends in the axial direction 110 from the respective first cell opening 124 to the respective second cell end 122. The walls 102 of the formwork 100 are therefore configured such that one or more of the cells 104 is in the form of a channel that extends from a respective first cell opening 124 to a respective second cell end 122.

[00259] The formwork 100 comprises a plurality of parallel cells 104. That is, an axis one or more of the cells 104 is aligned an axis of one or more other cells 104. In other words, a longitudinal axis of one or more of the cells 104 is parallel with a longitudinal axis of one or more other cell 104. The longitudinal axes of the cells 104 extend in the axial direction 110. In the illustrated embodiment, the longitudinal axis of each cell is aligned with the longitudinal axis of each other cell 104.

[00260] Each cell 104 may be said to have an axial dimension 126 (see Figure 21). The distance between the first cell end 120 and the second cell end 122 of a particular cell 104, measured in the axial direction 110, is the axial dimension 126 of that cell 104. In other words, the axial dimension 126 of a particular cell 104 of the plurality of cells 104 is a distance, measured in the axial direction 110, between a point on the first cell end 120 and a point on the second cell end 122 of the particular cell 104. The axial dimension 126 may be referred to as the height of the cell 104.

[00261] In some embodiments, the first cell end 120 and/or the second cell end 122 of one or more cells 104 are such that the distance between the first cell end 120 and the second cell end 122 of those cells 104, measured in the axial direction 110, changes across the cell 104. The axial dimension 126 of a cell 104 may be considered to be the shortest distance between the first cell end 120 and the second cell end 122 of the cell 104, measured in the axial direction 110. Alternatively, the axial dimension 126 of a cell 104 may be considered to be the longest distance between the first cell end 120 and the second cell end 122 of the cell 104, measured in the axial direction 110. Alternatively, the axial dimension 126 of a cell 104 may be considered to be the average distance between the first cell end 120 and the second cell end 122 of the cell 104, measured in the axial direction 110. Alternatively, some cells 104 may have a different axial dimension 126 at different points of the cell 104.

[00262] As described herein, the first cell end 120 of one or more of the cells 104 comprises the first cell opening 124 of that cell 104. Thus, the axial dimension 126 of such a cell 104 is a distance, measured in the axial direction 110, between a point on the first cell opening 124 and a second point on the second cell end 122 of the particular cell 104.

[00263] The openings 101 comprise a plurality of second cell openings 128. That is, the walls 102 define a plurality of second cell openings 128. The formwork 100 therefore comprises a plurality of second cell openings 128. One or more of the cells 104 comprises a second cell opening 128. In the illustrated embodiment, each of the cells 104 comprises a second cell opening 128. In other words, the walls 102 defining a particular cell 104 define a second cell opening 128 of that cell 104. The walls 102 defining each of the cells 104 define respective second cell openings 128 of those cells 104. The second cell opening 128 of a particular cell 104 is an opening of that cell 104. The second cell opening 128 of a particular cell 104 is defined by the walls 102 that define at least part of that cell 104. In other words, the walls 102 that define a cell 104 define the second cell opening 128 of that cell 104. The second cell opening 128 of a cell 104 may be considered a boundary of that cell 104. The second cell opening 128 of a cell 104 may define a boundary of that cell 104. Therefore, in some embodiments, one or more of the cells 104 is bound by the respective second cell opening 128. [00264] It will be understood that it may be a subset of the walls 102 that define a particular cell 104 that define the second cell opening 128 of that cell 104. The second cell opening 128 of one or more of the cells 104 is at the second cell end 122 of the respective cell 104. The second cell opening 128 may be considered the second cell end 122 of the respective cell 104. In the illustrated embodiment, each cell 104 comprises a second cell opening 128 at its respective second cell end 122. In other words, the walls 102 that define a cell 104 define the second cell opening 128 at the second cell end 122 of that cell 104. The second cell opening 128 of one or more cells 104 is planar. That is, one or more of the second cell openings 128 are planar. Each cell 104 extends in the axial direction 110 from the respective first cell opening 124 to the respective second cell opening 128. The walls 102 of the formwork 100 are therefore configured such that one or more of the cells 104 is in the form of a channel that extends from a respective first cell opening 124 to a respective second cell opening 128.

[00265] A size of one or more of the first cell openings 124 is different from a size of one or more of the second cell openings 128. One or more of the second cell openings 128 are smaller than one or more of the first cell openings 124. In the illustrated embodiment, the second cell opening 128 of a plurality of the cells 104 are smaller than the first cell opening 124 of the respective cells 104. The second cell opening 128 of a number of the cells 104 is smaller than the first cell opening 124 of the respective cell(s) 104. In other words, the second cell opening 128 that defines a boundary of a particular cell 104 is smaller than the first cell opening 124 that defines another boundary of that cell 104. That is, in some embodiments, an area of the second cell opening 128 of one or more of the cells 104 is less than an area of the first cell opening 124 of that cell 104. It will be appreciated; however, that in some embodiments, the first cell opening 124 and the second cell opening 128 of one or more of the cells 104 may be the same size. That is, the area of the first cell opening 124 and the second cell opening 128 of one or more of the cells 104 may be the same. Alternatively, the second cell opening 128 of one or more cells 104 may be larger than the corresponding first cell opening 124. In other words, the area of the second cell opening 128 of one or more of the cells 104 may be greater than the area of the first cell opening 124 of that cell 104. Thus, in some embodiments, the area of the first cell opening 124 of one or more of the cells 104 is different to the area of the second cell opening 128 of the respective cell 104.

[00266] The formwork 100 comprises peripheral cells 130. In particular, the formwork 100 comprises a plurality of peripheral cells 130. The peripheral cells 130 are cells 104 of the formwork 100. The peripheral cells 130 may be referred to as peripheral cells 130 of the formwork 100. The plurality of cells 104 comprises the peripheral cells 130. The plurality of cells 104 comprises the plurality of peripheral cells 130. The walls 102 define the peripheral cells 130. In particular, the walls 102 define the plurality of peripheral cells 130. In other words, each peripheral cell 130 is defined, at least in part, by a number of the walls 102. Each of the peripheral cells 130 is defined by a plurality of the walls 102. Some walls 102 define part of more than one peripheral cell 130. The walls 102 that define a peripheral cell 130 may be referred to as peripheral cell walls. The walls 102 that define part of more than one peripheral cell 130 may be referred to as peripheral cell partition walls.

[00267] The peripheral cells 130 may be considered to be volumes defined by walls 102. In particular, the relevant walls 102 define boundaries of the peripheral cells 130. The walls 102 that define at least part of a peripheral cell 130 may be referred to as peripheral walls. The walls 102 that define at least part of a peripheral cell 130 may be referred to as peripheral cell walls. [00268] One or more of the peripheral cells 130 may be considered to be a volume defined, at least partly, by respective walls 102. One or more of the peripheral cells 130 may be defined, at least in part, by one or more of the openings 101 . That is, an opening 101 may be considered to define a boundary of a peripheral cell 130. Therefore, the boundaries of the peripheral cells 130 may be formed or defined by the walls 102 that define the peripheral cells 130. One or more of the peripheral cells 130 may be defined, in part, by walls 102, and in part, by one or more of the openings 101 formed by these walls 102. That is, the boundaries of a peripheral cell 130 are formed by one or more walls 102 and one or more openings 101 of the formwork 100. Some of the boundaries of a peripheral cell 130 may be formed by the walls 102. Some of the boundaries of a peripheral cell 130 may be formed by the openings 101.

[00269] In the illustrated embodiment, each peripheral cell 130 is defined by a number of the walls 102 and by a number of openings 101 defined by these walls 102. The openings 101 may be considered to be boundaries of the peripheral cell 130. Specifically, an opening 101 may be considered to be a boundary of that peripheral cell 130. The openings 101 may be referred to as openings 101 of a peripheral cell 130. The openings 101 may be referred to as peripheral cell openings.

[00270] Each peripheral cell 130 may be said to have a shape. The shape of a peripheral cell 130 is the shape of the volume that is defined by the walls 102 that define the peripheral cell 130 and the openings 101 defined by those walls 102. The shape of each peripheral cell 130 is three-dimensional. The shape of each of the peripheral cells 130 is generally the same. [00271] The walls 102 defining a peripheral cell 130 may form a closed loop. The walls 102 defining one or more of the peripheral cells 130 form a closed loop. That is, the walls 102 may be traced around a perimeter of the relevant peripheral cell 130 without a break in the walls 102. In some embodiments, the walls 102 are traced along a plane to form the closed loop. The walls 102 may be traced along a plane that is orthogonal to the axial direction 110. The walls 102 that form the closed loop may define an annular shape. A peripheral cell 130 defined by walls 102 that form a closed loop may be referred to as a closed loop peripheral cell 135.

[00272] The walls 102 defining a peripheral cell 130 may form an open loop. The walls 102 defining one or more of the peripheral cells 130 form an open loop. The walls 102 defining a plurality of the peripheral cells 130 form open loops. A peripheral cell 130 defined by walls 102 that form an open loop may be referred to as an open loop peripheral cell 131 . A break in the walls 102 is present when the walls 102 are traced around a perimeter of the relevant peripheral cell 130. In some embodiments, the walls 102 are traced along a plane to form the open loop. The walls 102 may be traced along a plane that is orthogonal to the axial direction 110. The walls 102 that form the open loop may define part of an annular shape. A lateral end of one or more of the walls 102 of such a peripheral cell 130 terminates at a free end 133 (see Figures 8, 9). That is, a lateral end of at least one of the walls 102 that define an open loop peripheral cell 131 terminate at a free end 133. In the illustrated embodiment, one lateral end of each of two of the walls 102 that define each open loop peripheral cell 131 terminate at free ends 133. The spacing between the free ends 133 of those walls 102 defines an opening 101.

[00273] The formwork 100 comprises four open loop peripheral cells 131. Each open loop peripheral cell 131 is adjacent to a closed loop peripheral cell 135. That is, each open loop peripheral cell 131 shares a wall 102 with a closed loop peripheral cell 135. In other words, at least one of the walls 102 that defines a boundary of a closed loop peripheral cell 130 also defines a boundary of an open loop peripheral cell 131. In this way, the open loop peripheral cell 131 shares a wall 102 with the closed loop peripheral cell 130.

[00274] The formwork 100 comprises a peripheral portion 132. The peripheral cells 130 define at least part of the peripheral portion 132 (see Figure 6). The walls 102 that define the peripheral cells 130 define at least part of the peripheral portion 132. In the illustrated embodiment, the peripheral cells 130 define the peripheral portion 132 of the formwork 100. The walls 102 that define the peripheral cells 130 define the peripheral portion 132 of the formwork 100. Specifically, the peripheral portion 132 is bound by at least some of the walls 102 that define the peripheral cells 130. In other words, a boundary of the peripheral portion 132 is at least partially defined by the walls 102 that define the peripheral cells 130. The peripheral portion 132 extends around a periphery of the formwork 100. The peripheral portion 132 may be said to define a periphery of the formwork 100. The peripheral portion 132 may be considered the periphery of the formwork 100. Alternatively, the outer-most wall 102 of each peripheral cell 130 may define at least part of the periphery of the formwork 100. That is, a number of the walls 102 that define the peripheral cells 130 define at least part of periphery of the formwork 100. A gap between one or more walls 102 may define another part of, or the rest of, the periphery of the formwork 100. For example, in the illustrated embodiment, the gap between two open loop peripheral cells 131 may be taken to define part of the periphery and/or peripheral portion 132 of the formwork 100. In some embodiments, a number of the walls 102 that define the peripheral cells 130 define the entire periphery of the formwork 100. The periphery of the formwork 100 may be considered a perimeter of the formwork 100.

[00275] The peripheral portion 132 is shown in Figure 6 to be a portion of the formwork 100 that lies between a notional inner boundary 134 and a notional outer boundary 136. The notional inner boundary 134 extends along a number of inner walls 102 of the peripheral cells 130. The notional outer boundary 136 extends along a number of outer walls 102 of the peripheral cells 130. In other words, the space occupied by the peripheral cells 130, and at least part of the walls 102 defining the peripheral cells 130, may be considered to be the peripheral portion 132 of the formwork 100.

[00276] The peripheral cells 130 are defined, at least in part, by a number of inner walls 102. In the illustrated embodiment, the peripheral cells 130 are defined, at least in part, by a plurality of inner walls 102. Each inner wall 102 defines a boundary of the relevant peripheral cell 130.

Each inner wall 102 also defines the boundary of another cell 104. In some cases, an inner wall 102 also defines the boundary of another peripheral cell 130. In some cases, an inner wall 102 also defines the boundary of an internal cell 140 of the formwork 100. The peripheral cells 130 are defined, at least in part, by a number of outer walls 102. In the illustrated embodiment, the peripheral cells 130 are defined by a plurality of outer walls 102. The outer walls 102 define part of a peripheral cell 130. In some embodiments, an outer wall defines part of only one cell 104. [00277] The peripheral cells 130 are octagonal. In particular, the peripheral cells 130 are octagonal at at least one point along their height. In the illustrated embodiment, each of the peripheral cells 130 is octagonal at at least one point along its height. Specifically, the shape of one or more of the peripheral cells 130 is at least partially an octagonal prism. The octagonal prism may have rounded corners. The octagonal prism may be a tapered octagonal prism. The octagonal prism may have a curved side or a recess. The shape of one or more of the peripheral cells 130 may be in the form of two connected octagonal prisms, one being larger than the other. A number of the walls 102 defining one of the peripheral cells 130 may define a volume in the shape of, or resembling, a first octagonal prism. These walls 102 may be axial walls 107. A number of the walls 102 may define a second volume in the shape of, or resembling, a second octagonal prism. These walls 102 may be cantilever walls 103.

Alternatively, these walls 102 may be the same walls that define the volume in the shape of the first octagonal prism. The second octagonal prism may be a tapered octagonal prism. The second octagonal prism is smaller than the first octagonal prism. The respective peripheral cell 130 may be the combination of these two volumes. [00278] The formwork 100 comprises internal cells 140. In particular, the formwork 100 comprises a plurality of internal cells 140. The internal cells 140 are internal with respect to the peripheral cells 130. The peripheral cells 130 at least partially surround the internal cells 140. The internal cells 140 may be referred to as internal cells 140 of the formwork 100. The plurality of cells 104 comprises the internal cells 140. The plurality of cells 104 comprises the plurality of internal cells 140. The walls 102 define the internal cells 140. In particular, the walls 102 define the plurality of internal cells 140. In other words, each internal cell 140 is defined, at least in part, by a number of the walls 102. Each of the internal cells 140 are defined by a plurality of the walls 102. Some walls 102 define part of more than one internal cell 140. In the illustrated embodiment, a plurality of the walls 102 that define a particular internal cell 140 also define part of other internal cells 140. In other words, a plurality of the walls 102 that define a boundary of a particular internal cell 140 also define a boundary of another internal cell 140. One or more of the walls 102 that define an internal cell 140 also define a peripheral cell 130. In other words, one or more of the walls 102 that define a boundary of an internal cell 140 also define a boundary of a peripheral cell 130. A number of the internal cells 140 are therefore adjacent to a corresponding peripheral cell 130. Each peripheral cell 130 is adjacent to one or more internal cells 140. That is, each peripheral cell 130 shares one or more walls 102 with one or more internal cells 140.

[00279] Throughout this description, a wall 102 that defines a boundary of a plurality of cells 104 may be referred to as a partition wall. This is because the wall 102 is a partition between the two cells 104. Therefore, where a peripheral cell 130 shares a wall with an internal cell 140, the relevant wall 102 may be referred to as a partition wall. Similarly, where a peripheral cell 130 shares a wall 102 with another peripheral cell 130, the relevant wall 102 may be referred to as a partition wall.

[00280] The internal cells 140 may be considered to be volumes defined by walls 102. In particular, the relevant walls 102 define boundaries of the internal cells 140. The walls 102 that define at least part of an internal cell 140 may be referred to as internal walls. The walls 102 that define at least part of an internal cell 140 may be referred to as internal cell walls.

[00281] One or more of the internal cells 140 may be considered to be a volume defined, at least partly, be respective walls 102. One or more of the internal cells 140 may be defined, at least in part, by one or more of the openings 101 . That is, an opening 101 may be considered to define a boundary of an internal cell 140. One or more of the internal cells 140 may be defined, in part, by walls 102, and in part, by one or more of the openings 101 formed by these walls 102. That is, the boundaries of internal cells 140 are formed by one or more walls 102 and one or more openings 101 of the formwork 100. Some of the boundaries of an internal cell 140 may be formed by the walls 102. Some of the boundaries of an internal cell 140 may be formed by the openings 101 . [00282] In the illustrated embodiment, each internal cell 140 is defined by a number of the walls 102 and by a number of openings 101 defined by these walls 102. The openings 101 may be considered to be boundaries of the internal cell 140. Specifically, an opening 101 may be considered to be a boundary of that internal cell 140. The openings 101 may be referred to as openings 101 of an internal cell 140. The openings 101 may be referred to as internal cell openings.

[00283] Each internal cell 140 may be said to have a shape. The shape of an internal cell 140 is the shape of the volume that is defined by the walls 102 that define the internal cell 140 and the openings 101 defined by those walls 102. The shape of each internal cell 140 is three-dimensional.

[00284] The walls 102 defining an internal cell 140 form a closed loop. The walls 102 defining one or more of the internal cells 140 form a closed loop. That is, the walls 102 may be traced around a perimeter of the relevant internal cell 140 without a break in the walls 102. In some embodiments, the walls 102 are traced along a plane to form the closed loop. The walls 102 may be traced along a plane that is orthogonal to the axial direction 110. The walls 102 that form the closed loop may define an annular shape. An internal cell 140 defined by walls 102 that form a closed loop may be referred to as closed loop internal cells. In some embodiments, the walls 102 defining an internal cell 140 may form an open loop. An internal cell 140 defined by walls 102 that form an open loop may be referred to as an open loop internal cell. In the illustrated embodiment, internal cells 140 at or near the corner of the internal portion 142 are open loop cells. That is, the walls 102 defining the internal cells 140 at or near corners of the internal portion 142 form an open loop.

[00285] Each internal cell 140 shares one or more walls 102 with one or more other internal cell 140. In the illustrated embodiment, each internal cell 140 shares a wall 102 with a plurality of other internal cells 140. That is, at least one of the walls 102 that defines a boundary of an internal cell 140 also defines a boundary of another internal cell 140. In the illustrated embodiment, a plurality of the walls 102 that define boundaries of an internal cell 140 also define boundaries of other internal cells 140.

[00286] The formwork comprises an internal portion 142. The internal cells 140 define at least part of the internal portion 142 of the formwork 100. In the illustrated embodiment, the internal cells 140 define the internal portion 142 of the formwork 100. The walls 102 that define the internal cells 140 define the internal portion 142 of the formwork 100. The internal portion 142 of the formwork 100 is the portion of the formwork 100 that is internal to the notional inner boundary 134 of the peripheral portion 132. In other words, the internal portion 142 is the portion of the formwork 100 that is surrounded by the peripheral portion 132.

[00287] The peripheral portion 132 at least partially encircles the internal cells 140. In other words, the peripheral portion 132 at least partially surrounds the internal cells 140. That is, the peripheral portion 132 at least partially surrounds the internal portion 142. While it will be appreciated that there may be gaps or discontinuities along a length of peripheral cells 130, the peripheral portion 132 may be considered to span these gaps or discontinuities. Thus, in the illustrated embodiment, the peripheral portion 132 encircles the internal cells 140. Similarly, the peripheral portion 132 at least partially encircles the internal portion 142. In the illustrated embodiment, the peripheral portion 132 encircles the internal portion 142.

[00288] The internal cells 140 are defined, at least in part, by inner walls 102 of the formwork 100. That is, one or more of the walls 102 of one or more of the internal calls 140 is an inner wall 102 of the formwork 100. In the illustrated embodiment, a plurality of the walls 102 of each internal cell 140 are inner walls 102 of the formwork 100. One or more of the walls 102 of one or more internal cells 140 is an outer wall 102 of the formwork 100.

[00289] As described herein, of the cells 104 extend between a first cell opening 124 and a second cell end 122. A distance between the first cell opening 124 and the second cell end 122 of the cell 104, measured in the axial direction 110, is the axial dimension 126 of the cell 104. An internal cell 140 comprises a first cell opening 124. One or more of the internal cells 140 comprises a first cell opening 124. In the illustrated embodiment, each internal cell 140 comprises a first cell opening 124. An internal cell 140 comprises a second cell end 122. One or more of the internal cells 140 comprises a second cell end 122. In the illustrated embodiment, each internal cell 140 comprises a second cell end 122. An internal cell 140 comprises a second cell opening 128. One or more internal cells 140 comprise a second cell opening 128 at the second cell end 122 of the respective internal cell 140. Each internal cell 140 comprises a second cell opening 128 at its second cell end 122. One or more of the internal cells 140 define a channel between a first cell opening 124 and a second cell opening 128 of that internal cell 140. A plurality of the internal cells 140 define a channel between a first cell opening 124 and a second cell opening 128 of the respective internal cell 140. In the illustrated embodiment, each internal cell 140 defines a channel between the first cell opening 124 and the second cell opening 128 of that internal cell 140. The axial dimension 126 of an internal cell 140 is the distance, measured in the axial direction 110, between a point on the first cell opening 124 and a corresponding point on the second cell opening 128 of that internal cell 140.

[00290] The first cell openings 124 of a number of the internal cells 140 are coplanar. The first cell openings 124 of a plurality of the internal cells 140 are coplanar. In the illustrates embodiment, the first cell openings 124 of each of the internal cells 140 is coplanar. The second cell openings 128 of a number of the internal cells 140 are coplanar. The second cell openings 128 of a plurality of the internal cells 140 are coplanar. In the illustrated embodiment, the second cell openings 128 of each of the internal cells 140 are coplanar.

[00291] While the first cell openings 124 of the internal cells 140 are coplanar, as are the second cell openings 128, in some embodiments, this may not be the case. For example, in some embodiments, one or more of the first cell openings 124 of the internal cells 140 may be angled with respect to one or more other first cell opening 124 of the internal cells 140. In other words, one or more of the first cell openings 124 of the internal cells 140 may be transverse to one or more other first cell opening 124 of the internal cells 140. That is, the walls 102 that form one or more of the internal cells 140 may be different axial lengths and/or their axial lengths may change along the walls 102, such that the first cell opening 124 is angled. Similarly, one or more of the second cell openings 128 of the internal cells 140 may be angled with respect to one or more other second cell opening 128 of the internal cells 140.

[00292] A number of the internal cells 140 are octagonal. A plurality of the internal cells 140 are octagonal. In particular, the internal cells 140 are octagonal at at least one point along their height. In the illustrated embodiment, each of the internal cells 140 is octagonal at at least one point along its height. Specifically, the shape of one or more of the internal cells 140 is at least partially a octagonal prism. The octagonal prism may have rounded corners. The octagonal prism may be a tapered octagonal prism. The shape of one or more of the internal cells 140 may be in the form of two connected octagonal prisms, one being larger than the other. A number of the walls 102 defining one of the internal cells 140 may define a volume in the shape of a first octagonal prism. These walls 102 may be axial walls 107. A number of the walls 102 defining one of the internal cells 140 may define a second volume in the shape of a second octagonal prism. These walls 102 may be cantilever walls 103. Alternatively, these walls 102 may be the same walls 102 that define the volume in the shape of the first octagonal prism. The second octagonal prism may be a tapered octagonal prism. The second octagonal prism is smaller than the first octagonal prism. The respective internal cell 140 may be the combination of these two volumes.

[00293] One or more of the internal cells 140 are rectangular. A number of the internal cells 140 are rectangular. A plurality of the internal cells 140 are rectangular. Specifically, the shape of one or more of the internal cells 140 is at least partially a rectangular prism. The rectangular prism may have rounded corners. The rectangular prism may be a tapered rectangular prism. The shape of one or more of the internal cells 140 may be in the form of two connected rectangular prisms, one being larger than the other. One or more of the walls 102 defining one of the internal cells 140 may define a volume in the shape of a first rectangular prism. These walls 102 may be axial walls 107. One or more of the walls 102 defining one of the internal cells 140 may define a second volume in the shape of a second rectangular prism. These walls 102 may be cantilever walls 103. Alternatively, these walls 102 may be the same walls 102 that define the volume in the shape of the first rectangular prism. The second rectangular prism may be a tapered rectangular prism. The second rectangular prism is smaller than the first rectangular prism. The respective internal cell 140 may be the combination of these two volumes.

[00294] As described herein, the cells 104 extend between a first cell opening 124 and a second cell end 122. A distance between the first cell opening 124 and the second cell end 122 of the cell 104, measured in the axial direction 110, is the axial dimension 126 of that cell. A peripheral cell 130 comprises a first cell opening 124. One or more of the peripheral cells 130 comprises a first cell opening 124. In the illustrated embodiment, each peripheral cell 130 comprises a first cell opening 124. The first cell openings 124 of the peripheral cells 130 are planar. A number of the first cell openings 124 of the peripheral cells 130 are coplanar. A peripheral cell 130 comprises a second cell end 122. One or more of the peripheral cells 130 comprises a second cell end 122. In the illustrated embodiment, each peripheral cell 130 comprises a second cell end 122. A peripheral cell 130 comprises a second cell opening 128. The peripheral cell 130 comprises the second cell opening 128 at its second cell end 122. Each peripheral cell 130 comprises a second cell opening 128 at its second cell end 122. A peripheral cell 130 defines a channel between the first cell opening 124 and the second cell opening 128 of the respective peripheral cell 130. One or more of the peripheral cells 130 define a channel between a first cell opening 124 and a second cell opening 128 of that peripheral cell 130. A plurality of the peripheral cells 130 define respective channels between their first cell openings 124 and a second cell openings 128. In the illustrated embodiment, each peripheral cell 130 defines a channel between the first cell opening 124 and the second cell opening 128 of that peripheral cell 130. The second cell openings 128 of the peripheral cells 130 are planar. One or more of the second cell openings 128 of the peripheral cells 130 are coplanar. The axial dimension 126 of a peripheral cell 130 is the distance, measured in the axial direction 110, between a point on the first cell opening 124 and a corresponding point on the second cell opening 128 of that peripheral cell 130.

[00295] The axial dimension 126 of a peripheral cell 130 is less than the axial dimension 126 of an internal cell 140 of the formwork 100. The axial dimension 126 of one or more of the peripheral cells 130 is less than the axial dimension 126 of one or more of the internal cells 140. The axial dimension 126 of each of the peripheral cells 130 is less than the axial dimension 126 of one or more of the internal cells 140.

[00296] In the illustrated embodiment, the axial dimension 126 of each of the peripheral cells 130 is constant across the second cell opening 128 of the respective peripheral cell 130. Similarly, the axial dimension 126 of the internal cells 140 is constant across the second cell opening 128 of the respective internal cell 140. It will be appreciated that if the first cell opening 124 and/or the second cell opening 128 of a respective peripheral cell 130 are angled with respect to the normal plane, the distance between a first point on the first cell opening 124 and a corresponding second point (i.e. a point that lies on the second opening, that is intersected by a line parallel to the axial direction 110, that also intersects the first point) may change across at least part of the cell 130. This will occur if the angle of the first cell opening 124 and the second cell opening 128 with respect to the normal plane are not identical. In such a case, one may define a minimum axial dimension of the peripheral cell 130 (or, in fact, the cell 104 generally, if this occurs with another cell 104 of the formwork 100), being the minimum distance, measured in the axial direction 110, between the first cell opening 124 and the second cell opening 128 of the respective cell 104. Similarly, one may define a maximum axial dimension of the peripheral cell 130, being the maximum distance, measured in the axial direction 110, between the first cell opening 124 and the second cell opening 128. The minimum axial dimension of the one or more of the peripheral cells 130 is less than the axial dimension 126 of one or more of the internal cells 140.

[00297] The first cell end 120 and the second cell end 122 of a peripheral cell 130 are closer together than the first cell end 120 and the second cell end 122 of an internal cell 140. The first cell end 120 and the second cell end 122 of one or more of the peripheral cells 130 are closer together than the first cell end 120 and the second cell end 122 of one or more of the internal cells 140. The first cell end 120 and the second cell end 122 the peripheral cells 130 are closer together than the first cell end 120 and the second cell end 122 of one or more of the internal cells 140. The first cell ends 120 and the second cell ends 122 of the peripheral cells 130 are closer together than the first cell end 120 and the second cell end 122 of one or more of the internal cells 140. The first cell end 120 and the second cell end 122 of each of the peripheral cells 130 are closer together than the first cell end 120 and the second cell end 122 of one or more of the internal cells 140. In some embodiments, the first cell end 120 and the second cell end 122 of a plurality of the peripheral cells 130 are closer together than the first cell end 120 and the second cell end 122 of one or more of the internal cells 140. In the illustrated embodiment, the first cell end 120 and the second cell end 122 of each of the peripheral cells 130 are closer together than the first cell end 120 and the second cell end 122 of each of the internal cells 140.

[00298] The first cell opening 124 and the second cell end 122 of a peripheral cell 130 are closer together than the first cell opening 124 and the second cell end 122 of an internal cell 140. The first cell opening 124 and the second cell end 122 of one or more of the peripheral cells 130 are closer together than the first cell opening 124 and the second cell end 122 of one or more of the internal cells 140. The first cell opening 124 and the second cell end 122 the peripheral cells 130 are closer together than the first cell opening 124 and the second cell end 122 of one or more of the internal cells 140. The first cell openings 124 and the second cell ends 122 of the peripheral cells 130 are closer together than the first cell openings 124 and the second cell end 122 of one or more of the internal cells 140. The first cell opening 124 and the second cell end 122 of each of the peripheral cells 130 are closer together than the first cell opening 124 and the second cell end 122 of one or more of the internal cells 140. In some embodiments, the first cell opening 124 and the second cell end 122 of a plurality of the peripheral cells 130 are closer together than the first cell opening 124 and the second cell end 122 of one or more of the internal cells 140. In the illustrated embodiment, the first cell opening 124 and the second cell end 122 of each of the peripheral cells 130 are closer together than the first cell opening 124 and the second cell end 122 of each of the internal cells 140. [00299] The first cell opening 124 and the second cell opening 128 of a peripheral cell 130 are closer together than the first cell opening 124 and the second cell opening 128 of an internal cell 140. The first cell opening 124 and the second cell opening 128 of one or more of the peripheral cells 130 are closer together than the first cell opening 124 and the second cell opening 128 of one or more of the internal cells 140. The first cell opening 124 and the second cell opening 128 the peripheral cells 130 are closer together than the first cell opening 124 and the second cell opening 128 of one or more of the internal cells 140. The first cell openings 124 and the second cell openings 128 of the peripheral cells 130 are closer together than the first cell openings 124 and the second cell openings 128 of one or more of the internal cells 140. The first cell opening 124 and the second cell openings 128 of each of the peripheral cells 130 are closer together than the first cell opening 124 and the second cell opening 128 of one or more of the internal cells 140. In some embodiments, the first cell opening 124 and the second cell opening 128 of a plurality of the peripheral cells 130 are closer together than the first cell opening 124 and the second cell opening 128 of one or more of the internal cells 140. In the illustrated embodiment, the first cell opening 124 and the second cell opening 128 of each of the peripheral cells 130 are closer together than the first cell opening 124 and the second cell opening 128 of each of the internal cells 140.

[00300] The formwork 100 comprises a cantilever wall 103 (see Figures 7, 8 and 9). The cantilever wall 103 extends inwardly. The cantilever wall 103 may be considered to extend inwardly into a respective cell 104. It may be said that the cantilever wall 103 defines a part of a cell 104. In particular, the cantilever wall 103 may define part of a corner of the cell 104. The other part of the corner may be formed by the axial wall 107 that meets the cantilever wall at a junction 105. The cantilever wall 103 extends away from another wall 102 of the formwork 100. The other wall 102 may be an axial wall 107. The cantilever wall 103 therefore forms a cantilever with respect to the other wall 102.

[00301] The illustrated formwork 100 comprises a plurality of cantilever walls 103. A plurality of the cantilever walls 103 extend inwardly. The cantilever walls 103 may be considered to extend inwardly, each into a respective cell 104. Rather than extending inwardly into a respective cell 104, the cantilever walls 103 may be considered to extend inwardly to define a part of a respective cell 104. A number of the cantilever walls 103 extend outwardly from one or more other walls 102. The cantilever walls 103 extend outwardly from the axial walls 107. One or more of the cantilever walls 103 meets one or more other cantilever wall 103 at one or more junctions 105. The cantilever walls 103 each meet one or more axial walls 107 at a respective junction 105. The cantilever walls 103 extend orthogonally to other walls 102 of the formwork 100. Specifically, the cantilever walls 103 extend orthogonally to the axial walls 107. It will be appreciated that rather than extending orthogonally, the cantilever walls 103 may extend in a direction that is transverse to one or more other walls 102 of the formwork 100. This may be at an angle different to 90°. [00302] The cantilever walls 103 are parallel. One or more of the cantilever walls 103 are coplanar. The cantilever walls 103 are transverse to the axial walls 107. In the illustrated embodiment, the cantilever walls 103 are generally perpendicular to the axial walls 107. [00303] A number of the cantilever walls 103 extend inwardly into a respective cell 104. One or more cantilever walls 103 extend inwardly into a corresponding peripheral cell 130. Rather than being considered to extend inwardly into a peripheral cell 130, the respective cantilever walls 103 may be considered to extend inwardly to define a part of a respective cell 104 (such as a peripheral cell 130). In particular, one or more cantilever walls 103 may define a corner of the peripheral cell 130. The corner may be a rounded corner. The corner may comprise a chamfer.

[00304] At least one of the cantilever walls 103 is parallel to at least one other cantilever wall 103. In the illustrated embodiment, each cantilever wall 103 is parallel to each other cantilever wall 103. At least one of the cantilever walls 103 extending inwardly into a respective peripheral cell 130 is parallel to at least one other cantilever wall 103 extending inwardly into that peripheral cell 130. In other words, at least one cantilever wall 103 that defines at least part of a boundary of a peripheral cell 130 is parallel to at least one other cantilever wall 103. The other cantilever wall 103 may be a cantilever wall 103 defining a boundary of another peripheral cell 130. The other cantilever wall 103 may be a cantilever wall 103 defining a boundary of an internal cell 140. Further, at least one of the cantilever walls 103 extending inwardly into a respective peripheral cell 130 is parallel to at least one other cantilever wall 103 extending inwardly into another peripheral cell 130. In other words, at least one of the cantilever walls 103 that defines part of a respective peripheral cell 130 is parallel to at least one other cantilever wall 103 that defines part of the respective peripheral cell 130. Further, at least one of the cantilever walls 103 that defines part of a respective peripheral cell 130 is parallel to at least one other cantilever wall 103 that defines part of another peripheral cell 130. In other words, two or more of the cantilever walls 103 are parallel. In some cases, one or more of the cantilever walls 103 are coplanar. In the illustrated embodiment, each of the cantilever walls 103 is coplanar.

[00305] A number of the cantilever walls 103 extend inwardly into a respective internal cell 140. That is, one or more of the cantilever walls 103 extend inwardly into a respective internal cell 140. Rather than being considered to extend inwardly into an internal cell 140, the cantilever walls 103 may be considered to extend inwardly to define a corner of the internal cell 140. That is, the cantilever walls 103 may be considered to define a boundary of the internal cell 140. The corner may be a rounded corner. The corner may comprise a chamfer.

[00306] At least one of the cantilever walls 103 extending inwardly into a respective internal cell 140 is parallel to at least one other cantilever wall 103 extending inwardly into that internal cell 140. In other words, at least one cantilever wall 103 that defines at least part of a boundary of an internal cell 140 is parallel to at least one other cantilever wall 103. The other cantilever wall 103 may be a cantilever wall 103 defining a boundary of another internal cell 140. The other cantilever wall 103 may be a cantilever wall 103 defining a boundary of a peripheral cell 130. Further, at least one of the cantilever walls 103 extending inwardly into a respective internal cell 140 is parallel to at least one other cantilever wall 103 extending inwardly into another internal cell 140. In other words, at least one of the cantilever walls 103 that defines part of a respective internal cell 140 is parallel to at least one other cantilever wall 103 that defines part of the respective internal cell 140. Further, at least one of the cantilever walls 103 that defines part of a respective internal cell 140 is parallel to at least one other cantilever wall 103 that defines part of another internal cell 140.

[00307] The cantilever walls 103 are disposed at the second end 113 of the formwork 100. The cantilever walls 103 of a cell 104 are disposed at the second end of that cell 104. The cantilever walls 103 define at least part of the second cell openings 128 of one or more of the cells 104. The second cell openings 128 of some cells 104 are defined entirely by the cantilever walls 103 that define part of the boundary of those cells 104. The second cell openings 128 of some of the cells 104 are defined in part by the cantilever walls 103 that define part of the boundary of those cells 104. Other parts of the second cell openings 128 of those cells 104 may be defined by one or more other walls 102 (e.g. axial walls 107).

[00308] In the illustrated embodiment, the cantilever walls 103 define part of the second cell openings 128 of one or more of the internal cells 140 and one or more of the peripheral cells 130. In particular, the cantilever walls 103 define the second cell openings 128 of each of the internal cells 140. The cantilever walls 103 define the second cell openings 128 of a subset 144 of the peripheral cells 130. The cantilever walls 103 define the second cell openings 128 of another subset 145 of the peripheral cells 130. The cantilever walls 103 that define the second cell openings 128 of the peripheral cells 130 of the second subset 145 are smaller than those that define the second cell openings 128 of the first subset 144. In this way, the second cell openings 128 of the peripheral cells 130 of the second subset 145 are larger than the second cell openings 128 of the peripheral cells 130 of the first subset 144.

[00309] One or more of the cantilever walls 103 is axially offset with respect to one or more other cantilever wall 103 (see, for example, Figure 21 and Figure 25). One or more of the cantilever walls 103 that extend inwardly into a peripheral cell 130 is axially offset with respect to one or more of the cantilever walls 103 that extends inwardly into an internal cell 140 (see, for example, Figure 21 and Figure 25). In otherwords, one or more of the cantilever walls 103 that define a boundary of a peripheral cell 130 is axially offset from one or more of the cantilever walls 103 that define a boundary of an internal cell 140. The cantilever wall 103 may be in the form of a protrusion from another wall 102. For example, the cantilever wall 103 may be in the form of a protrusion from an axial wall 107 that defines part of a cell 104. As shown in Figure 21 , the cantilever wall 103 of the peripheral cell 130 shown in the cross-section 177 is axially offset from the cantilever wall 103 of the adjacent cell 104, which may be considered an internal cell 140. Similarly, the cantilever wall 103 of the peripheral cell 130 shown in the cross-section is axially offset from each of the cantilever wall portions 103 of each of the other internal cells 140. The cantilever walls 103 of the cells of the second subset 145 may be referred to as rims. The cantilever walls 103 of the cells of the second subset 145 may be referred to as internal rims. The internal rims are at the send cell end 122 of the respective cell 104.

[00310] This may be expressed differently by comparing the distances between the first cell opening 124 and the cantilever walls 103 of the peripheral cells 130. Specifically, a distance, measured in the axial direction 110, between one or more of the cantilever walls 103 that define part of a peripheral cell 130 and the first cell opening 124 of the respective peripheral cell 130 is less than a distance, measured in the axial direction, between one or more of the cantilever walls 103 that define part of an internal cell 140 and the first cell opening 124 of the respective internal cell 140.

[00311] The axial dimension 126 of one or more of the peripheral cells 130 is less than the axial dimension 126 of one or more of the internal cells 140. The axial dimension 126 of a plurality of the peripheral cells 130 is less than the axial dimension 126 of a plurality of internal cells 140. In the illustrated embodiment, the axial dimension 126 of each of the peripheral cells 130 is less than the axial dimension of each of the internal cells 140. The first cell openings 124 of one or more of the peripheral cells 130 are axially offset from the first cell opening 124 of one or more of the internal cells 140. This is shown, for example, in Figures 25 to 37. Similarly, the second cell openings 128 of one or more of the peripheral cells 130 are axially offset from the second cell openings 128 of one or more of the internal cells 140. Again, this is shown, for example, in Figure 21 and Figures 26 to 37.

[00312] The cells 104 comprise a first subset 144 of peripheral cells 130. The peripheral cells 130 comprise the first subset 144 of peripheral cells 130. The plurality of peripheral cells 130 comprises the first subset 144 of peripheral cells 130. In other words, the formwork 100 comprises a first subset 144 of peripheral cells 130. The peripheral cells 130 of the first subset 144 of peripheral cells 130 may be considered lower peripheral cells.

[00313] The first subset 144 of peripheral cells 130 comprises a first row 146 of cells 104. The cells 104 of the first row 146 of cells 104 are aligned. The first row 146 of cells 104 defines a first edge row of the formwork 100. That is, the first row 146 of cells 104 defines each of the cells 104 of an edge of the formwork 100. The first subset 144 of peripheral cells 130 comprises a first column 148 of cells 104. The cells 104 of the first column 148 of cells 104 are aligned. The first column 148 of cells 104 defines a second edge row of the formwork 100. That is, the first column 148 of cells 104 defines each of the cells 104 of an edge of the formwork 100. The first row 146 of cells 104 and the first column 148 of cells 104 comprise a cell 104 in common. The cell 104 in common is a corner cell 104 of the formwork. The cell in common 104 may be referred to as a first cell 104 in common. In other words, at least one peripheral cell 130 of the first subset 144 of peripheral cells 130 is part of both the first row 146 of cells 104 and the first column 148 of cells 104. In the illustrated embodiment, the first row 146 of cells 104 of the first subset 144 of peripheral cells 130 and the first column 148 of cells 104 of the first subset 144 of peripheral cells 130 comprise one cell 104 in common. In some embodiments, the first row 146 of cells 104 of the first subset 144 of peripheral cells 130 and the first column 148 of cells 104 of the first subset 144 of peripheral cells 130 comprise at least one cell 104 in common. The first row 146 of cells 104 of the first subset 144 of peripheral cells 130 and the first column 148 of cells 104 of the first subset 144 of peripheral cells 130 extend orthogonally with respect to each other. The walls 102 that define a peripheral cell 130 of the first subset 144 of peripheral cells 130 define a closed loop. In particular, the walls 102 that define one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 define closed loops. In other words, one or more cell 104 of the first subset 144 of peripheral cells 130 is a closed loop cell. The walls 102 that define a peripheral cell 130 of the first subset 144 of peripheral cells 130 define an open loop. In particular, the walls 102 that define one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 define open loops. In other words, one or more cell 104 of the first subset 144 of peripheral cells 130 is an open loop cell.

[00314] The walls 102 define the peripheral cells 130 of the first subset 144 of peripheral cells 130. In particular, the walls 102 define boundaries of the peripheral cells 130 of the first subset 144 of peripheral cells 130. Similarly, openings 101 define boundaries of the peripheral cells 130 of the first subset 144 of peripheral cells 130. Each peripheral cell 130 of the first subset 144 of peripheral cells 130 shares a wall 102 with another peripheral cell 130 of the first subset 144 of peripheral cells 130. Some peripheral cells 130 of the first subset 144 of peripheral cells 130 share one wall with another peripheral cell 130 of the first subset 144 of peripheral cells 130. In other words, a wall 102 which defines at least part of a boundary of a peripheral cell 130 of the first subset 144 of peripheral cells 130 also defines at least part of a boundary of another peripheral cell 130 of the first subset 144 of peripheral cells 130. The peripheral cells 130 which are adjacent to only one other peripheral cell 130 are the open loop cells.

[00315] Some peripheral cells 130 of the first subset 144 of peripheral cells 130 share two walls 102 with other peripheral cells 130 of the first subset 144 of peripheral cells 130. In the illustrated embodiment, a plurality of the peripheral cells 130 of the first subset 144 of peripheral cells 130 share two walls 102 with other peripheral cells 130 of the first subset 144 of peripheral cells 130. Therefore, a plurality of the peripheral cells 130 are defined, at least in part, by a common wall 102. Specifically, two peripheral cells 130 may be defined, at least in part, by a common wall 102. In other words, a wall 102 may define a boundary of a first peripheral cell 130 and a second peripheral cell 130. In other words, at least one of the walls 102 is a wall 102 of a first peripheral cell 130 and a second peripheral cell 130. One or more of the peripheral cells 130 of the first subset 144 has a wall 102 in common with one or more other peripheral cell 130. More broadly, a wall 102 may define a boundary of a first cell 104 and a second cell 104 of the formwork. A wall 102 may define a boundary of a peripheral cell 130 and a boundary of an internal cell 140. A wall 102 may define a boundary of a first internal cell 140 and a second internal cell 140. Such a wall 102 may be referred to as a common wall. Alternatively, such a wall 102 may be referred to as a partition wall.

[00316] A peripheral cell 130 of the first subset 144 of peripheral cells 130 comprises a first cell opening 124. One or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 comprises a respective first cell opening 124. A plurality of the peripheral cells 130 of the first subset 144 of peripheral cells 130 comprise a first cell opening 124. The first cell opening 124 is at the first cell end 120 of the respective peripheral cell 130. In the illustrated embodiment, each peripheral cell 130 of the first subset 144 of peripheral cells 130 comprises a respective first cell opening 124 at its first cell end 120.

[00317] A peripheral cell 130 of the first subset 144 of peripheral cells 130 comprises a second cell opening 128. One or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 comprises a second cell opening 128. A plurality of the peripheral cells 130 of the first subset 144 of peripheral cells 130 comprise a second cell opening 128. The second cell opening 128 is at the second cell end 122 of the respective peripheral cell 130. In the illustrated embodiment, each peripheral cell 130 of the first subset 144 of peripheral cells 130 comprises a second cell opening 128 at its second cell end 122.

[00318] The first cell end 120 of a peripheral cell 130 of the first subset 144 of peripheral cells 130 is axially offset from the first cell end 120 of one or more other cells 104. In other words, the first cell end 120 of a peripheral cell 130 of the first subset 144 of peripheral cells 130 is displaced, in the axial direction 110, with respect the first cell end 120 another cell 104. Throughout this description, “axially offset” may be understood to mean separated in the axial direction 110. It will be understood that two components may be axially offset and offset with respect to another axis, thereby not actually falling on the same axis that extends in the axial direction 110 (as would be the case for the first cell end 120 of a peripheral cell 130 of the first subset 144 of peripheral cells 130 and the first cell end 120 of an internal cell 140). For example, if two components were to occupy the same space, and one were to be moved in the axial direction 110 with respect to the other, the two components would be axially offset with respect to each other. Similarly, if two components are intersected by a plane that is orthogonal to the axial direction 110, and one of those two components is moved in the axial direction with respect to the other of the two components, the two components would be considered axially offset.

[00319] A first cell end 120 of a peripheral cell 130 of the first subset 144 of peripheral cells 130 is axially offset from the first cell end 120 of one or more of the internal cells 140. The first cell ends 120 of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the first cell ends 120 of one or more of the internal cells 140. In some embodiments, the first cell ends 120 of a plurality of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the first cell ends 120 of one or more of the internal cells 140. In some embodiments, the first cell ends 120 of a plurality of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the first cell ends 120 of a plurality of the internal cells 140. The first cell ends 120 of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the first cell ends 120 of a majority, or all of the internal cells 140. The first cell ends 120 of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the first cell ends 120 of one or more of the internal cells 140 by a first offset distance. The first offset distance is about half of the height of the internal cells 140.

[00320] The first cell opening 124 of a peripheral cell 130 of the first subset 144 of peripheral cells 130 is axially offset from the first cell opening 124 of one or more other cells 104. In other words, the first cell opening 124 of a peripheral cell 130 of the first subset 144 of peripheral cells 130 is displaced, in the axial direction 110, with respect to another cell 104. The first cell openings 124 of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the first cell openings 124 of one or more of the internal cells 140. In some embodiments, the first cell openings 124 of a plurality of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the first cell openings 124 of one or more of the internal cells 140. In some embodiments, the first cell openings 124 of a plurality of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the first cell openings 124 of a plurality of the internal cells 140. The first cell openings 124 of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the first cell openings 124 of a majority, or all of the internal cells 140. The first cell openings 124 of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the first cell opening 124 of one or more of the internal cells 140 by the first offset distance.

[00321] The first cell openings 124 of at least some of the peripheral cells 130 of the first subset 144 are coplanar. In the illustrated embodiment, the first cell openings 124 of each of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are coplanar.

[00322] One or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 comprise a respective second cell opening 128. A plurality of the peripheral cells 130 of the first subset 144 of peripheral cells 130 comprise respective second cell openings 128. In the illustrated embodiment, each peripheral cell 130 of the first subset 144 of peripheral cells 130 comprises a second cell opening 128. The second cell openings 128 are at the second cell end 122 of the respective peripheral cells 130. The second cell openings 128 of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are coplanar. The second cell openings 128 of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are coplanar with the second cell openings 128 of one or more of the internal cells 140. In the illustrated embodiment, the second cell openings 128 of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are coplanar with the second cell openings 128 of each ofthe internal cells 140. The cantilever walls 103 define the second cell openings 128 of the peripheral cells 130 of the first subset 144 of peripheral cells 130.

[00323] The peripheral cells 130 of the first subset 144 of peripheral cells 130 extend along a first side of the formwork 100. The peripheral cells 130 of the first subset 144 of peripheral cells 130 extend along a second side of the formwork 100. The first side and the second side of the formwork 100 are adjacent.

[00324] Alternative configurations are possible. For example, as described herein, one or more of the first cell openings 124 of the cells 104 may be angled (e.g. with respect to the normal plane of the formwork 100). For example, the first cell opening 124 of one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 may be angled with respect to the normal plane. Similarly, the first cell opening 124 of one or more of the internal cells 140 may be angled with respect to the normal plane. Where their angles with respect to the normal plane are different, the first cell opening 124 of one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 may be transverse to the first cell opening 124 of one or more of the internal cells 140. Similarly, the first cell opening 124 of one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 may be transverse to the second cell opening 128 of the respective peripheral cell 130. In other words, the first cell opening 124 and the second cell opening 128 of one of the peripheral cells 130 of the first subset 144 of peripheral cells 130 may be non-parallel. The first cell opening 124 of one or more of the internal cells 140 may be coplanar with the first cell opening 124 of one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130. In the illustrated embodiment, the first cell opening 124 of internal cells 140 at or near the corner of the internal portion 142 are coplanar with the first cell openings 124 of the peripheral cells 130 of the first subset 144 of peripheral cells 130.

[00325] The cells 104 comprise a second subset 145 of peripheral cells 130. The peripheral cells 130 comprise the second subset 145 of peripheral cells 130. The plurality of peripheral cells 130 comprises a second subset 145 of peripheral cells 130. In other words, the formwork 100 comprises a second subset 145 of peripheral cells 130. The peripheral cells 130 of the second subset 145 of peripheral cells 130 may be considered upper peripheral cells.

[00326] The second subset 145 of peripheral cells 130 comprises a row 146 of cells 104. The row 146 of cells 104 of the second subset 145 of peripheral cells 130 may be referred to as a second row 146 of cells 104. Thus, the second subset 145 of peripheral cells 130 may be said to comprise a second row 146 of cells 104. The cells 104 of the second row 146 of cells 104 are aligned. The second row 146 of cells 104 defines a third edge row of the formwork 100. That is, the second row 146 of cells 104 defines each of the cells 104 of an edge of the formwork 100. The second row 146 of cells 104 is parallel to the first row 146 of cells 104. The second subset 145 of peripheral cells 130 comprises a column 148 of cells 104. The column 148 of cells 104 of the second subset 145 of peripheral cells 130 may be referred to as a second column 148 of cells 104. Thus, the second subset 145 of peripheral cells 130 may be said to comprise a second column 148 of cells 104. The cells 104 of the second column 148 of cells 104 are aligned. The second column 148 of cells 104 defines a fourth edge row of the formwork 100. That is, the second column 148 of cells 104 defines each of the cells 104 of an edge of the formwork 100. The second column 148 of cells 104 is parallel to the first column 148 of cells 104. The second row 146 of cells 104 and the second column 148 of cells 104 comprise a cell 104 in common. The cell 104 in common is a corner cell 104 of the formwork 100. The cell 104 in common is a second cell 104 in common of the formwork 100. In other words, at least one peripheral cell 130 of the second subset 145 of peripheral cells 130 is part of both the second row 146 of cells 104 and the second column 148 of cells 104. In the illustrated embodiment, the second row 146 of cells 104 of the second subset 145 of peripheral cells 130 and the second column 148 of cells 104 of the second subset 145 of peripheral cells 130 comprise one cell 104 in common. In some embodiments, the second row 146 of cells 104 of the second subset 145 of peripheral cells 130 and the second column 148 of cells 104 of the second subset 145 of peripheral cells 130 comprise at least one cell 104 in common. The second row 146 of cells 104 of the second subset 145 of peripheral cells 130 and the second column 148 of cells 104 of the second subset 145 of peripheral cells 130 extend orthogonally with respect to each other. The walls 102 that define one or more peripheral cell 130 of the second subset 145 of peripheral cells 130 define a closed loop. In particular, the walls 102 that define a plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130 define closed loops. The walls 102 that define one or more peripheral cells 130 of the second subset 145 of peripheral cells 130 define an open loop. In particular, the walls 102 that define a plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130 define closed loops.

[00327] The formwork 100 is symmetric about an axis of symmetry 203. The axis of symmetry 203 passes through both the cell 104 in common between the first row 146 and the first column 148 of peripheral cells 130 of the first subset 144 of peripheral cells 130, and the cell 104 in common between the second row 146 and second column 148 of peripheral cells 130 of the second subset 145 of peripheral cells 130. The axis of symmetry 203 bisects the cell 104 in common between the first row 146 of cells 104 of the first subset 144 of peripheral cells 130 and the first column 148 of cells 104 of the first subset 144 of peripheral cells 130. The axis of symmetry 203 bisects the cell 104 in common between the second row 146 of cells 104 of the second subset145 of peripheral cells 130 and the second column 148 of cells 104 of the second subset 145 of peripheral cells 130. In other words, the formwork 100 is symmetric about an axis passing through two opposing corner cells 104. The axis of symmetry 203 bisects the two opposing corner cells 104.

[00328] A first end cell 121 A of the peripheral cells 130 of the first subset 144 of peripheral cells 130 is an open loop cell (see Figures 5A, 19). That is, walls 102 that define at least part of the first end cell 121A form an open loop. In particular, the axial walls 107 that define part of the first end cell 121A form an open loop. A lateral end of an axial wall 107 of the first end cell 121A terminates at a free end 133. A lateral end of another axial wall 107 of the first end cell 121A also terminates at a free end 133. An opening 101 is defined between the free ends 133. A size of the opening 101 corresponds to the size of at least one of the axial walls 107 of the first end cell 121 A. A size of the opening 101 corresponds to the size of at least one other wall 102 of the formwork 100. The first end cell 121 A is at an end of the first row 146 of cells 104 of the first subset 144 of peripheral cells 130.

[00329] A second end cell 123A of the peripheral cells 130 of the first subset 144 of peripheral cells 130 is an open loop cell (see Figure 5). That is, walls 102 that define at least part of the second end cell 123A form an open loop. In particular, the axial walls 107 that define part of the second end cell 123A form an open loop. A lateral end of an axial wall 107 of the second end cell 123A terminates at a free end 133. A lateral end of another axial wall 107 of the second end cell 123A also terminates at a free end 133. An opening 101 is defined between the free ends 133. A size of the opening 101 corresponds to the size of at least one of the axial walls 107 of the second end cell 123A. A size of the opening 101 corresponds to the size of at least one other wall 102 of the formwork 100. The second end cell 123A is at an end of the first column 148 of cells 104 of the first subset 144 of peripheral cells 130.

[00330] A first end cell 121 of the peripheral cells 130 of the second subset 145 of peripheral cells 130 is an open loop cell (see Figures 5A, 8, 14). That is, walls 102 that define at least part of the first end cell 121 form an open loop. In particular, the axial walls 107 that define part of the first end cell 121 form an open loop. A lateral end of an axial wall 107 of the first end cell 121 terminates at a free end 133. A lateral end of another axial wall 107 of the first end cell 121 also terminates at a free end 133. An opening 101 is defined between the free ends 133. A size of the opening 101 corresponds to the size of at least one of the axial walls 107 of the first end cell 121 . A size of the opening 101 corresponds to the size of at least one other wall 102 of the formwork 100. The first end cell 121 is at an end of the second column 148 of cells 104 of the second subset 145 of peripheral cells 130.

[00331] A second end cell 123 of the peripheral cells 130 of the second subset 145 of peripheral cells 130 is an open loop cell (see Figures 5A, 11 , 14). That is, walls 102 that define at least part of the second end cell 123 form an open loop. In particular, the axial walls 107 that define part of the second end cell 123 form an open loop. A lateral end of an axial wall 107 of the second end cell 123 terminates at a free end 133. A lateral end of another axial wall 107 of the second end cell 123 also terminates at a free end 133. An opening 101 is defined between the free ends 133. A size of the opening 101 corresponds to the size of at least one of the axial walls 107 of the second end cell 123. A size of the opening 101 corresponds to the size of at least one other wall 102 of the formwork 100. The second end cell 123 is at an end of the second row 146 of cells 104 of the second subset 145 of peripheral cells 130. [00332] The first end cell 121 , first end cell 121A, second end cell 123 and second end cell 123A may all be considered open loop peripheral cells 131.

[00333] The open loop peripheral cells 131 are each at the end of a respective row 146 or column 148 of cells 104. In particular, the formwork 100 comprises an open loop peripheral cell 131 at an end of a row 146 of peripheral cells 130. The formwork 100 comprises an open loop peripheral cell 131 at the end of a column 148 of peripheral cells 130.

[00334] The opening 101 of the open loop of an open loop peripheral cell 131 is at the end of the respective row 146 of peripheral cells 130. Similarly, the opening 101 of the open loop of an open loop peripheral cell 131 is at the end of the respective column 148 of peripheral cells 130. [00335] The walls 102 define the peripheral cells 130 of the second subset 145 of peripheral cells 130. In particular, the walls 102 define boundaries of the peripheral cells 130 of the second subset 145 of peripheral cells 130. Similarly, openings 101 define boundaries of the peripheral cells 130 of the second subset 145 of peripheral cells 130. Each peripheral cell 130 of the second subset 145 of peripheral cells 130 shares a wall 102 with another peripheral cell 130 of the second subset 145 of peripheral cells 130. Some peripheral cells 130 of the second subset 145 of peripheral cells 130 share one wall with another peripheral cell 130 of the second subset 145 of peripheral cells 130. In other words, a wall 102 which defines at least part of a boundary of a peripheral cell 130 of the second subset 145 of peripheral cells 130 also defines at least part of a boundary of another peripheral cell 130 of the second subset 145 of peripheral cells 130. The peripheral cells 130 which are adjacent to only one other peripheral cell 130 are the open loop cells.

[00336] Some peripheral cells 130 of the second subset 145 of peripheral cells 130 share two walls 102 with other peripheral cells 130 of the second subset 145 of peripheral cells 130. In the illustrated embodiment, a plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130 share two walls 102 with other peripheral cells 130 of the second subset 145 of peripheral cells 130.

[00337] The first subset 144 of peripheral cells 130 and the second subset 145 of peripheral cells 130 are mutually exclusive. That is, the first subset 144 of peripheral cells 130 and the second subset 145 of peripheral cells 130 comprise no cells 104 in common. The first subset 144 of peripheral cells 130 is independent from and the second subset 145 of peripheral cells 130. The first subset 144 of peripheral cells 130 defines two edge portions of the formwork 100. The second subset 145 of peripheral cells 130 defines two edge portions of the formwork 100. [00338] A peripheral cell 130 of the second subset 145 of peripheral cells 130 comprises a first cell opening 124. One or more of the peripheral cells 130 of the second subset 145 of peripheral cells 130 comprises a respective first cell opening 124. A plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130 comprise a first cell opening 124. The first cell opening 124 is at the first cell end 120 of the respective peripheral cell 130. In the illustrated embodiment, each peripheral cell 130 of the second subset 145 of peripheral cells 130 comprises a respective first cell opening 124 at its first cell end 120.

[00339] A peripheral cell 130 of the second subset 145 of peripheral cells 130 comprises a second cell opening 128. One or more of the peripheral cells 130 of the second subset 145 of peripheral cells 130 comprises a second cell opening 128. A plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130 comprise a second cell opening 128. The second cell opening 128 is at the second cell end 122 of the respective peripheral cell 130. In the illustrated embodiment, each peripheral cell 130 of the second subset 145 of peripheral cells 130 comprises a second cell opening 128 at its second cell end 122.

[00340] The second cell end 122 of a peripheral cell 130 of the second subset 145 of peripheral cells 130 is axially offset from the second cell end 122 of one or more other cells 104. In other words, the second cell end 122 of a peripheral cell 130 of the second subset 145 of peripheral cells 130 is displaced, in the axial direction 110, with respect the second cell end 122 of another cell 104. The second cell ends 122 of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell ends 122 of one or more of the internal cells 140. In some embodiments, the second cell ends 122 of a plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell ends 122 of one or more of the internal cells 140. In some embodiments, the second cell ends 122 of a plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell ends 122 of a plurality of the internal cells 140. The second cell ends 122 of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell ends 122 of a majority, or all of the internal cells 140.

[00341] A peripheral cell 130 of the second subset 145 of peripheral cells 130 comprises a second cell opening 128. The second cell opening 128 of a peripheral cell 130 of the second subset 145 of peripheral cells 130 is axially offset from the second cell opening 128 of one or more other cells 104. In other words, the second cell opening 128 of a peripheral cell 130 of the second subset 145 of peripheral cells 130 is displaced, in the axial direction 110, with respect to the second cell opening 128 of another cell 104. The second cell openings 128 of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell openings 128 of one or more of the internal cells 140. In some embodiments, the second cell openings 128 of a plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell opening 128 of one or more of the internal cells 140. In some embodiments, the second cell openings 128 of a plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell openings 128 of a plurality of the internal cells 140. The second cell openings 128 of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell openings 128 of a majority, or all of the internal cells 140. The second cell openings 128 of at least some of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are coplanar. In the illustrated embodiment, the second cell openings 128 of each of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are coplanar.

[00342] The second cell ends 122 of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell ends 122 of one or more of the internal cells 140 by a second offset distance. The second offset distance is about half of the height of the internal cells 140. The second offset distance is equal to the first offset distance. In other words, a height of the peripheral cells 130 of the second subset 145 of peripheral cells 130 is equal to a height of the peripheral cells 130 of the first subset 144 of peripheral cells 130. [00343] The first cell openings 124 of at least some of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are coplanar. In the illustrated embodiment, the first cell openings 124 of each of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are coplanar. The first cell opening 124 of one or more of the peripheral cells 130 is parallel to the first cell opening 124 of one or more of the internal cells 140. In particular, the first cell opening 124 of each of the peripheral cells 130 of the second subset 145 of peripheral cells 130 is parallel with the first cell opening 124 of one or more of the internal cells 140. The first cell openings 124 of at least some of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are coplanar with the first cell opening 124 of one or more of the internal cells 140. The first cell openings 124 of each of the peripheral cells 130 of the second subset 145 of peripheral cells 130 is coplanar with the first cell opening 124 of a majority, or all of the internal cells 140.

[00344] The second cell opening 128 of a peripheral cell 130 of the second subset 145 of peripheral cells 130 is axially offset from the second cell opening 128 of a peripheral cell 130 of the first subset 144 of peripheral cells 130. The second cell opening 128 of one or more of the peripheral cells 130 of the second subset 145 of peripheral cells 130 is axially offset from the second cell opening 128 of one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130. The second cell openings 128 of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell opening 128 of one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130. The second cell openings 128 of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are axially offset from the second cell openings 128 of the peripheral cells 130 of the second subset 145 of peripheral cells 130. In the illustrated embodiment, the second cell openings 128 of the peripheral cells 130 of the second subset 145 of peripheral cells 130 are axially offset from the second cell opening 128 of each of the peripheral cells 130 of the first subset 144 of peripheral cells 130. The second cell opening 128 of a peripheral cell 130 of the first subset 144 of peripheral cells 130 is parallel with the second cell opening 128 of one or more of the peripheral cells 130 of the second subset 145 of peripheral cells 130. [00345] Alternative configurations are possible. For example, as described herein, one or more of the first cell openings 124 may be angled (e.g. with respect to the normal plane of the formwork 100). For example, the first cell opening 124 of one or more of the peripheral cells 130 of the second subset 145 of peripheral cells 130 may be angled with respect to the normal plane. Similarly, the first cell opening 124 of one or more of the internal cells 140 may be angled with respect to the normal plane. Where their angles with respect to the normal plane are different, the first cell opening 124 of one or more of the peripheral cells 130 of the second subset 145 of peripheral cells 130 may be transverse to the first cell opening 124 of one or more of the internal cells 140. Similarly, the first cell opening 124 of one or more of the peripheral cells 130 of the second subset 145 of peripheral cells may be transverse to the second cell opening 128 of the respective peripheral cell 130. In other words, the first cell opening 124 and the second cell opening 128 of one of the peripheral cells 130 of the second subset 145 of peripheral cells 130 may be non-parallel.

[00346] The second cell opening 128 of one or more of the peripheral cells 130 is smaller than the first cell opening 124 of that peripheral cell 130. The second cell opening 128 of one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 is smaller than the first cell opening 124 of that peripheral cell 130. In the illustrated embodiment, the second cell opening 128 of each of the peripheral cells 130 of the first subset 144 of peripheral cells 130 is smaller than the first cell opening 124 of the respective peripheral cell 130. The second cell opening 128 of one or more of the peripheral cells 130 of the second subset 145 of peripheral cells 130 is smaller than the first cell opening 124 of that peripheral cell 130. In the illustrated embodiment, the second cell opening 128 of each of the peripheral cells 130 of the second subset 145 of peripheral cells 130 is smaller than the first cell opening 124 of the respective peripheral cell 130.

[00347] A cantilever wall 103 is provided at the second cell end 122 of the peripheral cells 130 of the first subset 144 of peripheral cells 130. This cantilever wall 103 may be referred to as a rib. A cantilever wall 103 is provided at the second cell end 122 of the peripheral cells 130 of the second subset 145 of peripheral cells 130.

[00348] The second cell opening 128 of one or more of the internal cells 140 is smaller than the first cell opening 124 of that internal cell 140. In the illustrated embodiment, the second cell opening 128 of each of the internal cells 140 is smaller than the first cell opening 124 of the respective internal cell 140.

[00349] The difference in dimensions between the peripheral cells 130 and the internal cells 140 results in these cells having different volumes. Specifically, a volume of one or more of the peripheral cells 130 is less than a volume of one or more of the internal cells 140. In the illustrated embodiment, the volume of each of the peripheral cells 130 is less than the volume of each of the octagonal internal cells 140. Further, the volume of one or more of the peripheral cells 130 may be greater than the volume of one or more of the internal cells 140. Specifically, the volume of each of the peripheral cells 130 may be greater than the volume of one or more of the rectangular internal cells 140.

Connecting Cells 150

[00350] The formwork 100 comprises a connecting cell 150. The formwork 100 comprises one or more connecting cells 150. The illustrated formwork 100 comprises a plurality of connecting cells 150. In particular, the plurality of cells 104 comprises the plurality of connecting cells 150. The walls 102 define the connecting cells 150. Each connecting cell 150 is configured to receive part of a second formwork. In other words, each connecting cell 150 is configured to receive part of another formwork. When the connecting cells 150 have received the respective parts of the second formwork, movement between the formwork 100 and the second formwork is inhibited.

[00351] The connecting cells 150 are circular. In the illustrated embodiment, each connecting cell 150 is cylindrical. Each connecting cell 150 is defined by curved walls 102. One or more of the connecting cells 150 are defined, at least in part, by walls 102 that also define at least part of one or more peripheral cells 130. In the illustrated embodiment, each connecting cell 150 is formed by a number of walls 102, each wall 102 forming part of another cell 104. Some of these other cells 104 are peripheral cells 130. Specifically, two of these other cells 104 are peripheral cells 130, for each connecting cell 150. One of these other cells is an internal cell 140. The connecting cells 150 are formed, in part, by walls 102 that also define part of a number of peripheral cells 130 of the first subset 144 of peripheral cells 130. The connecting cells 150 are therefore adjacent to peripheral cells 130 of the first subset 144 of peripheral cells 130. It will be appreciated however, that in some embodiments, one or more of the connecting cells 150 may be formed only by walls 102 that also form part of a peripheral cell 130.

[00352] The connecting cells 150 comprise a first cell opening 124. The first cell opening 124 of a particular connecting cell 150 is an opening of that connecting cell 150. The first cell opening 124 of one or more of the connecting cells 150 is at the first cell end 120 of the respective connecting cell 150. In the illustrated embodiment, each connecting cell 150 comprises a first cell opening 124 at its respective first cell end 120. Each connecting cell 150 extends in the axial direction 110 from the respective first cell opening 124 to the respective second cell end 122. The second cell end 122 of a connecting cell 150 comprises a second cell opening 128. A connecting cell 150 may therefore be said to extend from a first cell opening 124 to a second cell opening 128.

[00353] The first cell openings 124 of one or more of the connecting cells 150 are coplanar with the first cell openings 124 of one or more of the peripheral cells 130 of the second subset 145 of peripheral cells 130. In the illustrated embodiment, the first cell openings 124 of each of the connecting cells 150 are coplanar with the first cell openings 124 of each of the peripheral cells 130 of the second subset 145 of peripheral cells 130. The first cell opening 124 of a connecting cell 150 is coplanar with the first cell opening 124 of one or more of the internal cells 140. [00354] The second cell openings 128 of one or more of the connecting cells 150 are coplanar with the second cell openings 128 of one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130. In the illustrated embodiment, the second cell openings 128 of each of the connecting cells 150 is coplanar with the second cell openings 128 of each of the peripheral cells 130 of the first subset 144 of peripheral cells 130. The second cell opening 128 of a connecting cell 150 is coplanar with the second cell opening 128 of an internal cell 140. The connecting cells 150 may be referred to as female connectors.

[00355] The formwork 100 comprises a projection 152. The projection 152 is cylindrical. The projection 152 may be hollow. The projection 152 may be in the form of a truncated cone. The truncated cone may have a hollow core. The projection 152 is configured to cooperate with another formwork to inhibit relative movement between the formwork 100 and the other formwork. The formwork 100 comprises a plurality of projections 152. Each projection 152 is configured to cooperate with another formwork to inhibit relative movement between the formwork 100 and the other form work. The projection 152 may be referred to as a pin. The projection 152 may be referred to as a male connector.

[00356] Each of the projections 152 is configured to fit within a corresponding connecting cell of the other formwork(s). The shape of one or more of the projections 152 is such that they can be received within a volume that has the same or similar dimensions as one or more of the connecting cells 150.

[00357] The projections 152 project outwardly from one or more of the walls 102 defining the peripheral cells 130 of the second subset 145 of peripheral cells 130. The projections 152 project outwardly from the walls 102 defining the peripheral cells 130 of the second subset 145 of peripheral cells 130. In particular, the projections 152 project outwardly from a junction 105 between a plurality of walls 102, the walls 102 forming part of a number of peripheral cells 130 of the second subset 145 of peripheral cells 130. The projections 152 project in the axial direction 110. The projections 152 project parallel to the axial direction 110. The projections 152 project downwardly. One or more of the projections 152 are closer to the second cell openings 128 of the peripheral cells 130 of the second subset 145 of peripheral cells 130 than the first cell openings 124 of those peripheral cells 130. In other words, at least part of a projection 152 is closer to the second cell opening 128 of a peripheral cells 130 of the second subset 145 of peripheral cells 130 than the first cell opening 124 of that peripheral cells 130. In the illustrated embodiment, each of the projections 152 is closer to the second cell opening 128 of at least one of the peripheral cells 130 of the second subset 145 of peripheral cells 130 than the first cell openings 124 of those peripheral cells 130.

[00358] A connecting cell dimension 211 may be a radius of at least part of the connecting cell 150. The connecting cell dimension 211 may be a radius of the connecting cell 150 at a particular height of the connecting cell 150. The connecting cell dimension 211 of a connecting cell 150 may change across it’s height. In other words, the connecting cell dimension 211 of a connecting cell 150 may change as the connecting cell 150 is traversed from its second cell end 122 towards its first cell end 120. In some embodiments, the connecting cell dimension 211 increases as the connecting cell 150 is traversed from its second cell end 122 towards its first cell end 120. In some embodiments, the connecting cell dimension 211 decreases as the connecting cell 150 is traversed from its second cell end 122 towards its first cell end 120.

Cell Connection Channels 154

[00359] The formwork 100 comprises a number of cell connection channels 154. The illustrated formwork 100 comprises a plurality of cell connection channels 154. Each cell connection channel 154 extends between a number of openings 101 . The openings 101 are openings 101 defined by the walls 102 of the formwork 100. One or more of the walls 102 defines at least part of a respective cell connection channel 154. Each cell connection channel 154 fluidly connects two or more cells 104. In particular, each cell connection channel 154 fluidly connects two or more cells 104 via the respective openings 101 . A number of the cell connection channels 154 fluidly connect three cells 104. Each cell connection channel 154 extends between a number of cell connection openings 156. In the illustrated embodiment, each cell connection channel 154 extends between three cell connection openings 156. One or more of the cell connection openings 156 is an opening into a respective cell 104. Some of the cell connection openings are external openings, that open to a volume external to the cells 104. The cell connection channels 154 are located at the junctions 105 between the walls 102. In particular, the junction 105 between the axial walls 107 of each internal cell 140 comprises a respective cell connection channel 154. Similarly, the junction 105 between a number of the axial walls 107 of the peripheral cells 130 comprises a respective cell connection channel 154. The cell connection channels 154 are configured to enable a fill material that is provided into one of the cells 104 to move to an adjacent cell 104. The fill material may move to the adjacent cell 104 by passing through one or more of the cell connection channels 154 in the walls 102 that define the respective cell 104. A cell connection channel 154 provides a pathway from one cell 104 to another cell 104 through one or more walls 102.

[00360] The formwork 100 comprises a polymer. The formwork 100 may be constructed of polymer. The formwork may be constructed of a composite material comprising a polymer. The formwork 100 may be formed from a polymeric material. The formwork 100 may be formed from a recycled polymer. The walls 102 may be formed from the polymer.

The formwork 100 may be injection moulded. One or more of the walls 102 may have a draft angle applied to it. For example, a draft angle may be applied to one or more of the axial walls 107. The draft angle may take a value between 1 ° and 5°. The draft angle may be 1 °, 2°, 3°, 4°, or 5°, for example. Therefore, a thickness of a wall 102 of the formwork 100 may be greater towards the second end 113 of the formwork 100 than at the first end 111. In other words, the walls 102 of the formwork may be thicker towards their second ends than they are at their first ends. One or more of the walls 102 is thicker at the second end 122 of a cell 104 than at the first end 120.

Expansion Characteristics

[00361] In use, paths constructed using the formwork 100 will expand and contract with changes in environmental temperatures. As described herein, the shapes of at least some of the cells 104 of a particular row 146 of the formwork 100 are the same. Similarly, the shapes of at least some of the cells 104 of a particular column 148 of the formwork 100 are the same. Each row 146 intersects a column 148 at an intersection cell. The shapes of at least some of the cells 104 of a particular row 146 and a particular column 148 are the same shape as that of the intersection cell between that row 146 and that column 148.

[00362] A top view of part of the formwork 100 is shown in Figure 24. As described herein, each wall 102 has a wall thickness 119. Each cell 104 also has a planar cell dimension 213A. The planar cell dimension 213A of a cell 104 may be an apothem of that cell 104. The planar cell dimension 213A of a cell 104 may be an apothem of that cell 104 at a particular point along the axial dimension 126 of the cell 104. In other words, the planar cell dimension 213A of a cell 104 may be an apothem of that cell 104 at a particular height of the cell 104.

[00363] A wall thickness to cell dimension ratio may be defined along one or more notional lines of the formwork 100. Referring to Figure 24, a number of notional lines are shown. A wall thickness to cell dimension ratio may be defined as a ratio between a length of walls 102 intersected by a notional line along the formwork 100, at a particular height, and a length of cells 104 intersected by the notional line, at that height. In other words, a wall thickness to cell dimension ratio is a ratio between a length of walls 102 intersected by a notional line across the formwork 100, and a length of the voids defined by cells 104 of the formwork 100, that are intersected by that notional line. The notional line is orthogonal to the axial direction 110.

[00364] Figure 24 shows a first notional line 215. The first notional line 215 bisects one or more cells 104. In the illustrated embodiment, the first notional line 215 bisects one cell 104, and half of two cells 104. The first notional line 215 extends from a cross-sectional centre of a first cell 104 to a cross-sectional centre of a second cell 104. The first notional line 215 crosses a number of walls 102 of the formwork 100. The first notional line 215 crosses a number of cells 104. In particular, the first notional line 215 crosses the voids of a number of cells 104. The wall thickness to cell dimension ratio, along the first notional line 215, is the ratio between the length of walls 102 crossed by the first notional line 215, and the length of cells 104 crossed by the first notional line 215. In other words, the wall thickness to cell dimension ratio, along the first notional line 215, is the ratio between the sum of the wall thicknesses 119 of the walls 102 crossed by the first notional line 215, and the sum of the planar cell dimensions 213A of the cells 104 crossed by the first notional line 215. The relevant planar cell dimensions 213A are those transited by the first notional line 215. In this case, they are the apothems of the relevant cells 104. [00365] Figure 24 shows a second notional line 217. The second notional line 217 bisects one or more cells 104. In the illustrated embodiment, the second notional line 217 bisects one cell 104, and half of two cells 104. The second notional line 217 is orthogonal to the first notional line 215. The second notional line 217 extends from a cross-sectional centre of a first cell 104 to a cross-sectional centre of a second cell 104. The second notional line 217 crosses a number of walls 102 of the formwork 100. The second notional line 217 crosses a number of cells 104. In particular, the second notional line 217 crosses the voids of a number of cells 104. The wall thickness to cell dimension ratio, along the second notional line 217, is the ratio between the length of walls 102 crossed by the second notional line 217, and the length of cells 104 crossed by the second notional line 217. In other words, the wall thickness to cell dimension ratio, along the second notional line 217, is the ratio between the sum of the wall thicknesses 119 of the walls 102 crossed by the second notional line 217, and the sum of the planar cell dimensions 213A of the cells 104 crossed by the second notional line 217. The relevant planar cell dimensions 213A are those transited by the second notional line 217. In this case, they are the apothems of the relevant cells 104.

[00366] The first notional line 215 is parallel with a row 146 of cells 104. The second notional line 217 is parallel with a column 148 of cells 104. The first notional line 215 extends across the first end 111 of the formwork 100. The second notional line 217 extends across the first end 111 of the formwork 100. It will be appreciated that in other cases, notional lines may extend across the formwork 100 at any point between the first end 111 and second end 113. The first notional line 215 is the same length as the second notional line 217. The first notional line 215 extends along a row 146 of cells 104. In this case, this is a row 146 of peripheral cells 130. The second notional line 217 extends along a column 148 of cells 104. In this case, this is a column 148 of peripheral cells 130. The row 146 of cells 104 and the column 148 of cells 104 have a cell 104 in common. This is the cell that is partially bisected by each of the first notional line 215 and the second notional line 217. I.e. the corner cell 104.

[00367] The wall thickness to cell dimension ratio, along the first notional line 215, is the same as the wall thickness to cell dimension ratio, along the second notional line 217. In other words, the first notional line 215 crosses the same length of walls 102 as the second notional line 217. The first notional line crosses the same length of cells 104 as the second notional line 217. [00368] Therefore, a wall thickness to cell dimension ratio, along a row 146 of cells 104, is the same as a wall thickness to cell dimension ratio, along a column 148 of cells 104. The row 146 of cells 104 and the column 148 of cells 104 have a cell 104 in common. The cell 104 in common is bisected by the axis of symmetry 203 of the formwork 100. It will be understood that a wall thickness to cell dimension ratio may be determined at a particular height of the cells 104. While the specific wall thickness to cell dimension ratio may change between different cell heights (due to changes in the wall thicknesses 119 at different cell heights), the wall thickness to cell dimension ratio along a row 146 of cells 104 will remain the same as the wall thickness to cell dimension ratio along a column 148 of cells 104, where that row 146 and column 148 include a cell in common, and the measurements are taken at a common height. The cell in common may be the origin point of the measurements for determining the wall thickness to cell dimension ratios.

[00369] The wall thickness to cell dimension ratio, along a row 146 of peripheral cells 130 of the first subset 144 of peripheral cells 130, is equal to the wall thickness to cell dimension ratio, along a column 148 of peripheral cells 130 of the first subset 144 of peripheral cells 130. It will be understood that this ratio may be taken across at least part of the row/column. The wall thickness to cell dimension ratio, along a row 146 of peripheral cells 130 of the second subset 145 of peripheral cells 130, is equal to the wall thickness to cell dimension ratio, along a column 148 of peripheral cells 130 of the second subset 145 of peripheral cells 130. It will be understood that this ratio may be taken across at least part of the row/column.

[00370] The wall thickness to cell dimension ratio, along a row 146 of internal cells 140, is equal to the wall thickness to cell dimension ratio, along a column 148 of internal cells 140. [00371] It will be understood that this ratio may be taken across at least part of the row/column. That is, a wall thickness to cell dimension ratio, along part of a row 146 of cells 104, is equal to a wall thickness to cell dimension ratio, along part of a column 148 of cells 104. The row 146 of cells 104 may be a row of peripheral cells 130. The row 146 of cells 104 may be a row 146 of internal cells 140. The row 146 of cells 104 may comprise a peripheral cell 130 and an internal cell 140. The column 148 of cells 104 may be a column of peripheral cells 130. The column 148 of cells 104 may be a column 148 of internal cells 140. The column 148 of cells 104 may comprise a peripheral cell 130 and an internal cell 140.

[00372] This relationship applies across a variety of different notional lines. The ratio is applicable for orthogonal notional lines, that are parallel with respective rows 146 and columns 148 of the formwork 100, and centred with those cells 104. In some embodiments, the relationship is applicable at each height at which it may be measured.

Anchors 151

[00373] Figures 39 to 46 show an alternative embodiment of the formwork 100, according to some embodiments of the present disclosure. A section plane 171 is identified in Figure 40. The formwork 100 described with reference to Figures 39 to 45 has one or more features in common with the formwork 100 described with reference to Figures 5 to 38. For example, the formwork 100 of Figures 39 to 45 includes walls 102 that define cells 104. The walls 102 also define openings 101. The walls 102, cells 104 and/or openings 101 may be as described for the formwork 100 of Figures 5 to 38. Specifically, the formwork 100 of Figures 39 to 45 comprises a plurality of peripheral cells 130 and a plurality of internal cells 140. The peripheral cells 130 comprise a first subset 144 of peripheral cells 130. The peripheral cells 130 comprise a second subset 145 of peripheral cells 130. The peripheral cells 130 of the first subset 144 of peripheral cells 130 are the same as those of the formwork 100 described with reference to Figures 5 to 38. The peripheral cells 130 of the second subset 145 of peripheral cells 130 are the same as those of the formwork 100 described with reference to Figures 5 to 38, in one or more aspects. However, the formwork 100 of Figures 39 to 45 and/or the peripheral cells 130 of the second subset 145 of peripheral cells 130 of the formwork 100 of Figures 39 to 45 differ from the formwork 100 described with reference to Figures 5 to 38 in one or more aspects.

[00374] The formwork 100 of Figures 39 to 45 comprises an anchor 151 . Referring to Figure 44, the anchor 151 extends from a wall 102. The anchor 151 extends from a wall 102 that defines a boundary of a cell 104. Specifically, the anchor 151 extends from a wall 102 that defines a boundary of a peripheral cell 130. That is, the anchor 151 extends from a wall 102 of a peripheral cell 130. The anchor 151 extends orthogonally from the wall 102. It will be appreciated that in some embodiments, the anchor 151 may extend at a different angle than 90°.

[00375] The anchor 151 extends from a first lateral end 157 to a second lateral end 159. The first lateral end 157 is at the wall 102 from which the anchor 151 extends. In other words, the first lateral end 157 is adjacent to the wall 102 from which the anchor 151 extends. The anchor 151 may be considered to meet the wall 102 at a junction. The first lateral end 157 is at the junction. The second lateral end 159 is a free end of the anchor 151. The second lateral end 159 is an end of the anchor 151 that is furthest away from the wall 102 from which the anchor 151 projects.

[00376] The anchor 151 extends from a first axial end 153 to a second axial end 155. The first axial end 153 is at the wall 102 from which the anchor 151 extends. In other words, the first axial end 153 is adjacent to the wall 102 from which the anchor 151 extends. The second axial end 155 is a second free end of the anchor 151 .

[00377] Each point of the anchor 151 has an associated lateral dimension. The lateral dimension of a point of the anchor 151 is the distance between the first lateral end 157 and the second lateral end 159 of the anchor 151 , at that point, measured in a lateral direction 161. The lateral direction 161 may be a lateral direction of the formwork 100. The lateral direction 161 is orthogonal to the axial direction 110.

[00378] The lateral dimension of the anchor 151 changes along a length of the anchor 151. Specifically, the lateral dimension of the anchor 151 changes as the anchor 151 is traversed from the first axial end 153 to the second axial end 155. The lateral dimension of the anchor 151 increases from a first lateral dimension at or near the first axial end 153, to a second lateral dimension 165 at an intermediate axial point 163 along the length of the anchor 151. The first lateral dimension may be a minimum lateral dimension of the anchor 151 . The second lateral dimension 165 may be a maximum lateral dimension of the anchor 151 . In the illustrated embodiment, the lateral dimension of the anchor increases from a minimum dimension at or near the first axial end 153, to a maximum dimension at the intermediate axial point 163 of the anchor 151. The intermediate axial point 163 is coplanar with the second cell end 122 of the cell 104 at which the anchor 151 is disposed. Specifically, the intermediate axial point 163 is coplanar with the second cell opening 128 of the peripheral cell 130 defined, in part, by the wall 102 from which the anchor 151 extends.

[00379] The lateral dimension of the anchor 151 changes from the maximum dimension at the intermediate axial point 163, to an intermediate dimension 167 at the second axial end 155 of the anchor 151. In particular, the lateral dimension of the anchor 151 decreases from the maximum dimension at the intermediate axial point 163, to the intermediate dimension 167 at the second axial end 155 of the anchor 151. The second axial end 155 of the anchor 151 is planar. Lateral edges 169 of the anchor 151 are planar. In other words, the anchor 151 comprises one or more lateral edge faces.

[00380] A thickness of the anchor 151 is constant across at least part of the anchor 151 . The thickness of the anchor 151 is measured in a direction that is orthogonal to the lateral direction 161. The thickness of the anchor 151 is measured in a direction that is orthogonal to the axial direction 110. The thickness of the anchor 151 is greater than a thickness of the walls 102. The thickness of the anchor 151 is greater than a thickness of the walls 102 at one or more points of the formwork 100. The thickness of the anchor 151 may be any one of 1 mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm and 10mm. In the illustrated embodiment, the anchor 151 is 5mm thick.

[00381] In some embodiments, the thickness of the anchor 151 may be greater closer to the wall 102 from which it projects, than towards a lateral end of the anchor 151. That is, a thickness of the anchor 151 may change along a dimension of the anchor 151 . Increasing the thickness of the anchor 151 at the connection between the anchor 151 and the wall 102 increases the strength with which the anchor 151 is connected to the wall 102. This can reduce the likelihood that it breaks off from the wall 102 in use.

[00382] The formwork 100 comprises one or more anchors 151. The illustrated formwork 100 comprises a plurality of anchors 151. As described herein, the formwork 100 comprises a plurality of outer walls 102. The outer walls 102 define boundaries of the peripheral cells 130. The anchors 151 extend from these outer walls 102. In other words, the anchors 151 are connected to these outer walls 102. The anchors 151 may therefore be said to extend from outer walls 102 of the formwork 100. The anchors 151 extend from the outer walls 102 that define the cells 104 of the second subset 145 of peripheral cells 130.

[00383] The formwork 100 comprises at least one anchor 151 for each peripheral cell 130 of the second subset 145 of peripheral cells 130. In the illustrated embodiment, the formwork 100 comprises two anchors 151 for each of a plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130. Specifically, the formwork 100 comprises two anchors 151 for each peripheral cell 130 of the second subset 145 of peripheral cells 130, other than one peripheral cell 130 of the second subset 145 of peripheral cells 130. That one peripheral cell 130 is the cell 104 in common between the second row 146 of cells 104 and the second column 148 of cells 104 of the second subset 145 of peripheral cells 130. In other words, one anchor 151 extends, collectively, from the walls 102 that define at least part of a boundary of the cell 104 in common between the second row 146 of cells 104 and the second column 148 of cells 104 of the second subset 145 of peripheral cells 130.

[00384] As described herein, the formwork 100 comprises a plurality of outer walls 102. The outer walls 102 define boundaries of the peripheral cells 130. The anchors 151 extend from these outer walls 102. In other words, the anchors 151 are connected to these outer walls 102. The anchors 151 may therefore be said to extend from outer walls 102 of the formwork 100. [00385] The formwork 100 comprises an outer anchor 151 A. The formwork 100 comprises a plurality of outer anchors 151 A. The outer anchors 151 A extend away from the walls 102 of the formwork 100. That is, the outer anchors 151A extend away from the internal cells 140 of the formwork 100. The outer anchors 151A also extend away from the peripheral cells 130 of the formwork 100.

[00386] The outer anchors 151 A extend from one or more of the walls 102 of one or more of the peripheral cells 130. In the illustrated embodiment, the formwork 100 comprises at least one outer anchor 151 for one or more peripheral cell 130. Specifically, the formwork 100 comprises one outer anchor 151 for more than one peripheral cell 130 of the second subset 145 of peripheral cells 130. In other words, an outer anchor 151 A extends from a wall 102 defining at least part of a plurality of the peripheral cells 130 of the second subset 145 of peripheral cells 130. An outer anchor 151A does not extend from any of the walls 102 defining the cell 104 in common between the second row 146 of cells 104 of the second subset 145 of peripheral cells 130 and the second column 148 of cells 104 of the second subset 145 of peripheral cells 130.

[00387] The formwork 100 comprises an inner anchor 151 B. The inner anchor 151 B extends from its respective wall 102, towards another of the walls 102 that define a boundary of the relevant peripheral cell 130. The formwork 100 comprises a plurality of inner anchors 151 B. The inner anchors 151 B extend from their respective walls 102, towards one or more other walls 102 of the formwork 100.

[00388] An inner anchor 151 B extends through the second cell opening 128 of the peripheral cell 130 defined, at least in part, by the wall 102 from which the inner anchor 151 B extends. The second axial end 155 of the inner anchor 151 B is therefore on an opposite side of the second cell opening 128 to the first axial end 153 of that inner anchor 151 B. Each of the inner anchors 151 B extend through a respective second cell opening 128. The second axial end 155 of each inner anchor 151 B is therefore on an opposite side of the relevant second cell opening 128 to the first axial end 153 of the respective inner anchor 151 B.

[00389] The second axial end 155 of the inner anchor 151 B is further away from the first cell opening 124 of the peripheral cell 130 defined, at least in part, by the wall 102 from which the inner anchor 151 B extends, than the second cell opening 128 of that peripheral cell 130. In other words, the second cell opening 128 of the peripheral cell 130 defined, at least in part, by the wall 102 from which the inner anchor 151 B extends, is between the second axial end 155 of the inner anchor 151 B and the first cell opening 124 of that peripheral cell 130.

[00390] The formwork 100 comprises a pair of anchors 151 for one or more peripheral cell 130 of the second subset 145 of peripheral cells 130. In the illustrated embodiment, the formwork 100 comprises a pair of anchors 151 for each peripheral cell 130 of the second subset 145 of peripheral cells 130 other than the cell 104 in common between the second row 146 of cells 104 and the second column 148 of cells 104. Each pair of anchors 151 comprises an outer anchor 151 A and an inner anchor 151 B. The outer anchor 151 A is a mirror of the inner anchor 151 B. The outer anchor 151 A and the inner anchor 151 B are aligned. The outer anchor 151 A and the inner anchor 151 B are aligned to define a channel therebetween. [00391] A width of the channel may be defined as a distance, at an axial point of the channel, between the inner anchor 151 B and the outer anchor 151 A that define that channel. In the illustrated embodiment, the width of the channel increases along the axial lengths of the outer anchor 151 A and the inner anchor 151 B. That is, the width of the channel decreases as the channel is traversed from the second axial ends 155 of the outer anchor 151A and the inner anchor 151 B, towards the first axial ends 153 of the outer anchor 151 A and the inner anchor 151 B that define the channel. In some embodiments, the width of the channel may be constant. In some embodiments, the width of the channel may increase as the channel is traversed from the second axial ends 155 of the outer anchor 151 A and the inner anchor 151 B, towards the first axial ends 153 of the outer anchor 151 A and the inner anchor 151 B that define the channel. The channel is configured to receive an upper portion of a wall that defines part of a peripheral cell of an another formwork.

[00392] The peripheral cells 130 of the second subset 145 of peripheral cells 130 include the anchors 151 described herein. The peripheral cells 130 of the first subset 144 of peripheral cells 130 do not include anchors. However, it will be appreciated that in some embodiments, one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 may comprise one or more anchors. These anchors may be as described with reference to anchors 151 , in one or more aspects. These anchors may be mirrored about a transverse plane of the formwork 100 compared to the anchors 151 . That is, where the anchors 151 extend through the second cell openings 128 of the peripheral cells 130 of the second subset 145 of peripheral cells 130, it will be appreciated that the anchors of the peripheral cells 130 of the first subset 144 of peripheral cells 130 may extend through the first cell openings 124 of the relevant cells 104. That is, they may extend from one side of the first cell opening 124 of the relevant cell 104, to another side of the first cell opening 124 of that cell 104. In this way, they may define channels like that described with reference to anchors 151 A and 151 B. The channels may be configured to receive one or more walls of peripheral cells of a second subset of peripheral cells of an adjacent formwork 100. That is, the channel can receive upper peripheral cells of an adjacent formwork.

Connecting Cell Protrusions 191

[00393] Referring to Figure 48, the walls 102 defining a connecting cell 150 may comprise a connecting cell protrusion 191. The connecting cell protrusion 191 may be referred to as a shear pin. The connecting cell protrusion 191 may be in the form of a shear pin. The connecting cell protrusion 191 protrudes away from a corresponding wall 102. The connecting cell protrusion 191 protrudes towards another wall 102. The connecting cell protrusion 191 protrudes into the connecting cell 150.

[00394] The illustrated formwork 100 comprises a plurality of connecting cell protrusions 191 for each connecting cell 150. Specifically, the formwork 100 comprises three connecting cell protrusions 191 for each connecting cell 150. The connecting cell protrusions 191 are spaced equidistantly on the walls defining a connecting cell 150. The connecting cell protrusions 191 are equally spaced about the connecting cell 150. Each connecting cell protrusion 191 is separated by a respective junction 105. A radius of the connecting cell 150, at a connecting cell protrusion 191 , is less than a radius of the connecting cell 150 where the connecting cell protrusion 191 is not in place. It will be appreciated that in some embodiments, the spacing of the connecting cell protrusions 191 may be different.

[00395] The connecting cell protrusion 191 extends along at least part of an axial length of the connecting cell 150. The connecting cell protrusion 191 may extend along the entire axial length of the connecting cell 150. In other words, the connecting cell protrusion 191 may protrude from the relevant wall 102, along at least part of the axial length of that wall 102. The connecting cell protrusion 191 may protrude from the relevant wall 102, along the entire axial length of that wall 102. In some embodiments, a connecting cell protrusion 191 extends along only part of the respective wall 102. It may extend along a lower part of the wall 102. It may extend along an upper part of the wall 102 (i.e. a part close to the first cell opening 124) of that cell 104. The connecting cell protrusions 191 are configured to improve a connection between multiple formworks 100 that are connected together. In some embodiments, the connecting cell protrusions 191 are configured to enable an interference fit to be formed between the connecting cells 150 of one formwork and the projections 152 of another formwork 100. In some embodiments, the connecting cell protrusions 191 plastically deform when a projection 152 is inserted into a corresponding connecting cell 150. The deformation may be a shear. That is, the connecting cell protrusions 191 may be configured to shear when a projection 152 is inserted into a corresponding connecting cell 150. In this way, the connecting cell protrusions 191 may be shear pins that improve the quality of the connection between adjacent formworks 100. The connecting cell protrusions 191 may be consumable.

[00396] The radius of the connecting cell 150, at a connecting cell protrusion 191 , may be less than a radius of the projection 152 that fits within that connecting cell 150, when the formwork 100 is connected to another formwork 100. This may be referred to as a dimension rather than a radius.

[00397] Part of the connecting cell protrusions 191 may break away from the walls 102 of the formwork 100 during construction of a path. As the radius of the projection 152 of another formwork 100 is greater than the radius of the connecting cell 150 at the connecting cell protrusions 191 , the projection 152 may break off part of one or more of the connecting cell protrusions 191 during installation. This may be referred to as a dimension rather than a radius. Method of Constructing a Path

[00398] The formwork 100 is configured to be used in the construction of a path. Specifically, a plurality of formworks like the formwork 100 described with reference to Figures 5 to 44 can be used in the construction of a path. The formwork 100 is configured to receive a fill material. In particular, one or more of the cells 104 is configured to receive the fill material. In the illustrated embodiment, each cell 104 is configured to receive the fill material.

[00399] To construct a path, a number of appropriately sized formworks manufactured in accordance with the present description are provided. The illustrated formwork 100 comprises 14 cells 104 in each row 146 and column 148 of peripheral cells 130. It will be understood that in some embodiments, this number may be different. For example, the rows 146 of peripheral cells 130 may comprise 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 , 12, 13, 14, 15, 16, 17, 18, 19 or 20 cells 104. The columns 148 of peripheral cells 130 may comprise 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 , 12, 13, 14, 15, 16, 17, 18, 19 or 20 cells 104. The number of cells 104 in a row 146 of the peripheral cells 130 may be different to the number of cells 104 in a column 148 of the peripheral cells 130. The number of cells 104 in a row 146 of cells 104 of the formwork 100 may be different to the number of cells 104 in a column 148 of cells of the formwork 100. In some embodiments, the number of cells 104 in a first row 146 may be different to the number of cells 104 in a second row 146. These rows 146 may be rows of peripheral cells 130 or rows of internal cells 140. Similarly, the number of cells 104 in a first column 148 may be different to the number of cells 104 in a second column 148. These columns 148 may be columns of peripheral cells 130 or columns of internal cells 140.

[00400] Initially, a base layer of the path is provided on the ground. The base layer may be in the form of a polymer layer. The polymer layer may comprise one or more polymer sheets. [00401] The formworks 100 are connected together, on top of the base layer, using the respective connecting cells 150 and projections 152. More generally, the formworks 100 are connected together on top of the ground. Referring to Figure 46, one formwork 100 may be placed on the base layer. An additional formwork 100, itself comprising peripheral cells 130, connecting cells 150 and projections 152 like those described herein, is connected to the formwork 100 on the base layer by lifting the additional formwork 100, aligning the projections 152 along one side of the additional formwork 100 with the connecting cells 150 of the formwork 100 placed on the base layer, and inserting the projections 152 of the additional formwork in to the connecting cells 150. The second formwork 100 may alternatively be slid into position from the side of the first formwork 100. This can be repeated for any number of formworks 100 over any area on which a path is desired to be constructed. Four formworks 100 are shown in Figure 46. When installed, some of the peripheral cells 130 of the first subset 144 of peripheral cells 130 of the first formwork 100 overlap some of the peripheral cells 130 of the second subset 145 of peripheral cells 130 of the second formwork 100. These overlapping peripheral cells 130 define complete cells 104 (i.e. cells 104 that are the same height as the cells 104 of the internal cells 140 of the respective formworks 100).

[00402] Following connection of the formworks 100, the fill material can be provided into the cells 104 of each formwork 100. The fill material may comprise a cementitious material. The fill material may comprise a bituminous material. The fill material may comprise a granular fill material. The fill material may comprise one or more of a cementitious material, a bituminous material and a granular fill material. The fill material may comprise a fibrous material. For example, the fill material may comprise carbon fibres. The fill material may comprise polypropylene fibres. The fill material may comprise, for example, 3-5kg of fibrous material per cubic metre. The use of a fibrous material may provide particular benefit when the fill material is a cementitious material. The fill material may comprise cement. The fill material may be poured over the formworks 100 such that it enters the cells 104 of the formworks 100. The cell connection channels 154 enable the fill material to flow between the cells 104 even if it is not poured directly over each individual cell 104. This enables each of the cells 104 of each ofthe formworks 100 to be filled with the fill material without requiring the fill material to be explicitly poured over each cell 104. The fill material can be added until one or more of the cells 104 is filled with it. In some cases, the fill material can overflow over the top of a number of the cells 104, if a top layer of the fill material is desired. If the fill material needs to cure and/or set, it can be allowed to cure and/or set following its application. It should be noted that the complete cells defined by overlapping peripheral cells of adjacent formworks should be filled with the fill material. The complete cells may be referred to as composite cells. This may be because they are formed from the walls 102 defining peripheral cells 130 of adjacent formworks 100. [00403] Following application of the fill material, and allowing it to set, if necessary, the upper surface of the path can be levelled. The upper surface may be levelled using a vibrating screed. The upper surface of the path may be finished. The upper surface of the path may be finished using a chopper.

[00404] In use, the formwork 100 remains as part of the path. The formwork 100 may therefore be referred to as a permanent formwork. Alternatively, the formwork 100 may be referred to as a lost formwork.

[00405] A plurality of the formworks 100 described herein can also be used to construct curved paths. Referring to Figure 47, the formworks 100 do not need to be directly aligned. In some cases, the formworks 100 can be connected with offset edge portions to facilitate the construction of a curved path. It will be appreciated that a smaller formwork 100 (i.e. a formwork with a lower number of peripheral cells in each row and column of cells) can be used for sharper curve radii.

Method of Repairing a Path

[00406] The path produced using the described method is easily repairable. If, for example, there is a void in the ground underneath the path, the void can be filled and/or any damage caused to the path can be repaired. A hole may be drilled through one of the cells 104 that is located above the void. A filler product can be injected into the void until the void is substantially filled. The filler product may be the fill material described herein. The filler product may be a foam. The filler product may also be applied until the cell 104 that was drilled out is re-filled with it. Alternatively, after the provision of the filler product, additional fill material can be provided to re-fill the relevant cell 104. Such a filler product can be allowed to set, after which, the path is repaired.

Advantages

[00407] The formwork 100 described herein provides a number of significant advantages. [00408] Existing flexible pavements reguire a significant volume of material and excavated depth. Higher material volumes and excavation depths result in associated increased costs of construction. Damage to flexible pavements is also common.

[00409] Rigid pavements are adversely affected by temperature changes, which can cause expansion and subseguent cracking of the rigid pavements. Rigid pavements can also be relatively expensive to construct and difficult to repair.

[00410] The formwork 100 described herein can enable the construction of a path/pavement for the conveyance of traffic that provides benefits that are typically only provided by one of flexible pavements or rigid pavements.

[00411] The formwork 100 enables the path that is ultimately constructed to flex, as the formwork 100 is generally less rigid than a concrete or steel re-enforced concrete path. As the cells 104 of the formwork 100 are filled with fill material, the compressive strength of the fill material can be utilised in use, whilst the flexibility of the formwork 100 enables the path to flex when under load. A path constructed using the formwork 100 can therefore provide benefits that are traditionally provided by only one of flexible pavements and rigid pavements. That is, a path constructed using the formwork 100 can provide the benefits of a rigid pavement (e.g. where the fill material is concrete), whilst also providing the benefits of a flexible pavement, at least in part due to the flexibility provided by the formwork 100 and the way the formwork divides the path into cells 104 filled with the fill material. Such characteristics can reduce the wear experienced by the path over time and can lead to an increase in the working lifespan of a path constructed using the formwork 100.

[00412] The formwork 100 enables the construction of a path that can support a high load whilst sustaining a reduced amount of damage. For example, a path constructed using an array of connected formworks 100, in combination with concrete as a fill material, can provide sufficient structural integrity for a concrete truck to drive across without disturbing the subjacent base courses.

[00413] The construction of such a path using conventional methods could require a significant volume of concrete. The described formwork 100, and the described method of constructing a path using the formwork 100 therefore remove or reduce the requirement for an expensive concrete pump in some instances, for example on a large expanse of pavement area.

[00414] Further, a composite pavement course constructed as described herein, comprised of formworks 100 filled with a fill material, can achieve a large tensile load bearing capacity, when compared to known conventional flexible and rigid pavement courses.

[00415] The formwork 100 described herein enables the construction of paths with a relatively small vertical profile (i.e. depth, and therefore, corresponding excavation requirements), that are capable of supporting the transport of heavy vehicles. Such paths can be constructed using a reduced amount of materials, which can significantly reduce the cost of producing such a path, and the logistical difficulties associated with constructing such paths.

[00416] The cell connection channels 154 of the formwork 100 advantageously enable fill material to flow between cells 104 during construction. This enables the fill material to settle at a relatively constant height throughout the path that is being constructed.

[00417] No formwork or additional concrete reinforcement is required, saving both time and cost.

[00418] The concrete required to construct a path using the formwork 100 described herein is significantly less than either a conventional rigid pavement or flexible pavement. Further, the reduced thickness of the pavement course requires less excavation and material than conventional pavements. Less excavation means less expensive heavy machinery, lower risk of hitting or disrupting underground services, and reduced schedules.

[00419] The load profile of a pavement course according to the present disclosure is similar to a rigid pavement, as depicted in Figure 4, with the load being spread due to the tensile stress being carried through the formwork 100 filled with fill material. As such, any defects or voids beneath the path are shallower than would be experienced by flexible pavements.

[00420] In addition, due to higher tensile strength, the path has a greater loading capacity and may continue to operate with a defect below the path, for a longer period without failure which requires repair, than conventional pavements.

[00421] In the event of a void appearing under the path, access beneath the path can be provided by removing a single cell of fill material and injecting a suitable filler product to fill the void. Further, prior to repair, the flexibility of the formwork 100 enables the path to flex to partially accommodate the void. This can reduce damage to the composite path (i.e. the formwork 100 filled with fill material) caused by damage underneath the path. [00422] As described herein, the formwork 100 comprises a plurality of peripheral cells 130. The peripheral cells 130 are configured to overlap with peripheral cells 130 of adjacent formworks 100, during installation. When the fill material is poured into the formworks 100 during construction of the path, the overlapping peripheral cells 130 of adjacent formworks 100 form a composite cell which receives the fill material. The composite cell is formed from walls 102 of two different formworks 100. Such a configuration enables the structural characteristics of particular fill materials to be better utilised. For example, where the fill material is concrete, the compressive strength of concrete is better utilised by formworks 100 of the present design, compared to other designs. This is particularly the case where loads are applied to the path that act to move one formwork 100 away from the adjacent formwork 100. In this case, a force is applied by the walls 102 of the peripheral cells 130 of one of the formworks 100 in a first direction, and a second force is applied by the walls of the peripheral cells 130 of the adjacent formwork 100 in another direction that is different to (e.g. opposite to) the first direction. In this case, the fill material in the composite cell is compressed by the walls 102 of the formworks 100. Where the fill material is concrete, the compressive strength of the concrete can be utilised in this case to inhibit separation of the formworks 100. This characteristic of paths formed using the formwork 100 described herein can significantly increase the operating life of a path.

[00423] The walls 102 of the formwork 100 are also configured to accommodate expansion and contraction of the fill material. As described herein, the formwork 100 may comprise a polymer. The walls 102 may therefore be formed from a polymer. Alternatively, the walls 102 may be formed from another material that is capable of accommodating expansion and contraction of the fill material. The formwork 100 may comprise a polymer composite material. That is, the formwork 100 may comprise a polymer mixed with another material. In some embodiments, an additive is added to the polymer prior to the polymer being formed into the formwork 100. Therefore, the formwork may comprise an additive.

[00424] The walls 102 of the formwork 100 are of a thickness that reduces or eliminates the need for expansion gaps to be provided in the path. This is because the walls 102 each act as independent expansion gaps, with each accommodating a portion of the expansion of the fill material. Thus, the formwork 100 enables the construction of a path with no, or with a reduced number of expansion gaps. This reduces the complexity of construction of the path, can reduce the construction cost and can increase the longevity of the path.

[00425] The formwork 100 therefore enables the construction of a path that has improved structural integrity compared to paths constructed using existing methods, with the structural integrity characteristics of a path constructed using the formwork 100 significantly exceeding conventional pavements at lower thickness.

[00426] The anchors 151 also provide significant technical benefits. When a path is constructed using the formworks 100, forces from heavy vehicles, in use, can cause the path to flex. As described herein, the pairs of anchors 151 form channels therebetween. The channels are formed underneath the walls 102 defining the peripheral cells 130 of the second subset 145 of peripheral cells 130 of a respective formwork 100. In use, another formwork 100 is positioned such that some of the peripheral cells 130 of the first subset 144 of peripheral cells 130 are aligned with the peripheral cells 130 of the second subset 145 of peripheral cells 130 of the first formwork 100. In use, an upper portion of the walls 102 defining the relevant peripheral cells 130 of the first subset 144 of peripheral cells 130 of the second formwork 100 are positioned between the pairs of anchors 151. These anchors 151 act to restrict relative movement between the sets of peripheral cells 130 of the different formworks 100. The anchors 151 also embed the ends of the peripheral cells 130 of the first formwork 100 in the fill material, inhibiting motion of this part in use. The anchors 151 may therefore reduce relative motion between different formworks where they connect together, reducing cracking or failure rates of paths constructed using the formworks 100.

[00427] As described herein, the connecting cell protrusions 191 are configured to enable an interference fit to be formed between the connecting cells 150 of one formwork 100 and the projections 152 of another formwork 100 that are received within those connecting cells 150. This can improve the extent to which the formworks 100 may be connected together. It can improve the reliability of the connections and reduce the likelihood of a projection 152 dislodging from a connecting cell 150.

[00428] As described herein, the wall thickness to cell dimension ratio, along at least part of a row 146 of cells 104, is equal to the wall thickness to cell dimension ratio, along at least part of a column 148 of cells 104. This characteristic of the design of the formwork 100 provides significant advantages. As described herein, the formwork 100 is configured to be filled with a fill material in the construction of a path. Designing the formwork 100 such that the wall thickness to cell dimension ratio, along at least part of a row 146 of cells 104, is equal to the wall thickness to cell dimension ratio, along at least part of a column 148 of cells 104 ensures that a ratio of the length of fill material, to the wall thickness 119, along notional lines of the formwork 100, are equal in orthogonal directions. In this way, the formwork 100 and fill material expand in equal amounts along both the first lateral axis 173 and the second lateral axis 175, in use. That is, the path, once constructed, expands in equal amounts along both the first lateral axis 173 and the second lateral axis 175, in use.

[00429] The formwork 100 is described to include a plurality of rows 146 of cells 104 and a plurality of columns 148 of cells 104. The rows 146, as shown in Figure 19, are horizontal rows 146. That is, the rows 146 extend in a direction parallel to the first lateral axis 173. The columns 148 of Figure 18 are vertical columns 148. That is, the columns 148 extend in a direction parallel to the second lateral axis 175. In some embodiments, diagonal rows and columns may be considered. Referring to Figure 19, the formwork 100 comprises a number of diagonal rows. The formwork 100 also comprises a number of diagonal columns. The diagonal rows comprise cells 104 of alternating shapes. The axis of symmetry 203 extends along a diagonal row. The diagonal rows are parallel to the axis of symmetry 203. The diagonal columns comprise cells 104 of alternating shapes. The diagonal columns are orthogonal to the axis of symmetry 203. [00430] The wall thickness to cell dimension ratio relationship also applies to rows 146 and columns 148 considered diagonally. The wall thickness to cell dimension ratio, along at least part of a diagonal row of cells 104, is equal to the wall thickness to cell dimension ratio, along at least part of a diagonal column of cells 104. Again, the diagonal row of cells 104 and the diagonal column of cells 104 comprise a cell in common. The cell in common may be a reference cell for the measurement. In this way, the fill material and the formwork 100 also expand in equal amounts in directions that are 45° rotated with respect to the first lateral axis 173 and the second lateral axis 175. That is, the path, once constructed, expands in equal amounts in directions that are 45° rotated with respect to the first lateral axis 173 and the second lateral axis 175.

[00431] Therefore, a wall thickness to cell dimension ratio, along a diagonal row of cells 104, is the same as a wall thickness to cell dimension ratio, along a diagonal column of cells 104. The diagonal row of cells 104 and the diagonal column of cells 104 have a cell 104 in common. The cell 104 in common is bisected by the axis of symmetry 203 of the formwork 100. It will be understood that a wall thickness to cell dimension ratio may be determined at a particular height of the cells 104. While the specific wall thickness to cell dimension ratio may change between different cell heights (due to changes in the wall thicknesses 119 at different cell heights), the wall thickness to cell dimension ratio along a diagonal row of cells 104 will remain the same as the wall thickness to cell dimension ratio along a diagonal column of cells 104, where that row 146 and column 148 include a cell in common, and the measurements are taken at a common height, along equal lengths of the row and column, from a common reference point of one or more cells 104 (e.g. the centre of one or more cells 104). The cell in common may be the origin point of the measurements for determining the wall thickness to cell dimension ratios.

[00432] Wall thickness to cell dimension ratios being as described herein can improve the useable life of the path. Cracking of the fill material and/or breakage of the formwork 100 can be reduced. The reliability of the path over time is therefore increased.

[00433] As described herein, the peripheral cells 130 of a first subset 144 extend along a first side of the formwork 100 and a second side of the formwork 100. The first and second sides are adjacent, such that the relevant row 146 and column 148 of cells have a cell in common. The peripheral cells 130 of the second subset 145 are arranged in a similar configuration, however, they are axially offset with respect to the peripheral cells 130 of the first subset 144. All of the peripheral cells 130 of a particular side or edge of the formwork 100 are the same height. They are also offset from the internal cells 140, at at least an upper side or a lower side by an offset. The peripheral cells 130 of the first subset 144 are offset at their upper ends. The peripheral cells 130 of the second subset 145 are offset at their lower ends. Thus, the axial dimension of the peripheral cells 130 of the first subset is less than that of the internal cells. This configuration allows multiple formworks 100 of the same design to be easily connected together. The formworks 100 can be connected from one direction (i.e. either above or below) without an additional impediment of axial alignment being important.

[00434] It will be appreciated that in some embodiments, one or more of the peripheral cells 130 of the first subset 144 of peripheral cells 130 may have a configuration as described with reference to a peripheral cell 130 of the second subset 145 of peripheral cells 130 described herein. Similarly, one or more of the peripheral cells 130 of the second subset 145 of peripheral cells 130 may have a configuration as described with reference to a peripheral cell 130 of the first subset 144 of peripheral cells 130 described herein.

[00435] Alternatively, the formwork 100 may comprise a row 146 and/or column 148 of peripheral cells 130 that are axially offset from the upper and lower boundaries of the internal cells 140. That is, the axial dimension of the relevant peripheral cell 130 may be less than that of the internal cells 140; however, the first cell end 120 may be offset with respect to the first cell end 120 of one or more of the internal cells 140, and the second cell end 122 may be offset with respect to the second cell end 122 of one or more internal cells 140. This type of peripheral cell 130 may be referred to as a central peripheral cell. Similarly, the formwork 100 may comprise a set of coaxial peripheral cells 130. That is, a row 146 or column 148 of peripheral cells 130 may comprise one or more pairs of coaxial cells 104. The coaxial cells 104 are coaxial. The coaxial cells 104 are axially offset with respect to each other. Again, a distance between the first cell end 120 and the second cell end 122 of the coaxial cells would be less than the distance between the first cell end 120 and the second cell end 122 of the internal cells 140. The pairs of coaxial cells 104 may define a spacing therebetween. This spacing may be configured to receive a central peripheral cell of another formwork 100. In this way, the central peripheral cell of the adjacent formwork 100 and the coaxial peripheral cells of the formwork 100 would be aligned, coaxially, to receive fill material.

[00436] Many modifications may be made to the embodiments described herein without departing from the spirit and scope of the disclosure.

[00437] In the claims which follow and in the preceding description, except where the context requires otherwise due to express language or necessary implication, the word “comprise” or variations such as “comprises” or “comprising” is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the disclosure.

Claims

1. A formwork comprising: a plurality of walls, the walls defining a plurality of cells, each cell extending in an axial direction from a first cell opening to a second cell end; wherein: the plurality of cells comprises: a plurality of peripheral cells; and a plurality of internal cells; the peripheral cells define at least part of a peripheral portion of the formwork; the internal cells define at least part of an internal portion of the formwork; the peripheral portion of the formwork at least partially surrounds the internal portion of the formwork; the first cell opening and the second cell end of the peripheral cells are closer together than the first cell opening and the second cell end of one or more of the internal cells; the plurality of peripheral cells comprises: a first subset of peripheral cells; and a second subset of peripheral cells; and the first subset of peripheral cells comprises: a first row of cells; and a first column of cells.

2. The formwork of claim 1 , wherein the first row of cells of the first subset of peripheral cells and the first column of cells of the first subset of peripheral cells comprise a cell in common.

3. The formwork of claim 1 or claim 2, wherein the second subset of peripheral cells comprises: a second row of cells; and a second column of cells; and the second row of cells of the second subset of peripheral cells and the second column of cells of the second subset of peripheral cells comprise a cell in common.

4. The formwork of any one of claims 1 to 3, wherein one or more peripheral cell has a wall in common with one or more other peripheral cell.

5. The formwork of any one of claims 1 to 3, wherein at least one of the walls is a wall of a first peripheral cell and a second peripheral cell.

6. The formwork of any one of claims 1 to 3, wherein one or more of the peripheral cells has a wall in common with one or more other peripheral cell.

7. The formwork of any one of claims 1 to 6, wherein: the first cell openings of the peripheral cells of the first subset of peripheral cells are coplanar; and the first cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the first cell opening of one or more of the internal cells.

8. The formwork of any one of claims 1 to 7, wherein the cells each comprise a second cell opening, the second cell opening being at the second cell end of the respective cell.

9. The formwork of claim 8, wherein: the second cell openings of the peripheral cells of the first subset of peripheral cells are coplanar; and the second cell openings of the peripheral cells of the first subset of peripheral cells are coplanar with the second cell openings of one or more of the internal cells.

10. The formwork of any one of claims 1 to 9, wherein: the first cell openings of the peripheral cells of the second subset of peripheral cells are coplanar; and the first cell openings of the peripheral cells of the second subset of peripheral cells are coplanar with the first cell openings of the internal cells.

11. The formwork of claim 8, claim 9 or claim 10 when dependent on claim 8, wherein: the second cell openings of the peripheral cells of the second subset of peripheral cells are axially offset from: the second cell opening of one or more of the internal cells; and the second cell opening of one or more of the peripheral cells of the first subset of peripheral cells.

12. The formwork of any one of claims 1 to 11 , further comprising an anchor, the anchor extending from one of the walls that defines a boundary of a peripheral cell.

13. The formwork of claim 12, wherein the anchor extends: in a lateral direction, from a first lateral end that is at the wall from which the anchor extends, to a second lateral end, the second lateral end being a free end of the anchor; and in the axial direction, from a first axial end to a second axial end, the second axial end being a second free end of the anchor.

14. The formwork of claim 12 or claim 13, wherein a lateral dimension of the anchor changes from a minimum lateral dimension at or near the first axial end, to a maximum lateral dimension at an intermediate axial point of the anchor.

15. The formwork of claim 14, wherein the intermediate axial point is coplanar with the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends.

16. The formwork of claim 14 or claim 15, wherein the lateral dimension of the anchor changes from the maximum dimension at the intermediate axial point, to an intermediate dimension at the second axial end of the anchor, the intermediate dimension being less than the maximum dimension.

17. The formwork of any one of claims 12 to 16, wherein the anchor extends from its respective wall, towards one or more other walls of the formwork.

18. The formwork of claim 17, wherein the anchor extends through the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends.

19. The formwork of claim 17 or claim 18, wherein the second axial end of the anchor is further away from the first cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends, than it is from the second cell opening of that peripheral cell.

20. The formwork of any one of claims 17 to 19, wherein the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends, is between the second axial end of the anchor and the first cell opening of that peripheral cell.

21. The formwork of any one of claims 12 to 16, wherein the anchor extends away from the walls of the formwork.

22. The formwork of any one of claims 12 to 21 , wherein the formwork comprises at least one anchor for more than one peripheral cell of the second subset of peripheral cells.

23. The formwork of claim 22, comprising two anchors for each of a plurality of the peripheral cells of the second subset of peripheral cells.

24. The formwork of claim 22 or claim 23, when dependent on claim 3, wherein one anchor extends, collectively, from the walls that define at least part of a boundary of the cell in common between the second row of cells and the second column of cells of the second subset of peripheral cells.

25. The formwork of any one of claims 1 to 24, wherein the formwork is symmetrical about an axis of symmetry, the axis of symmetry bisecting: the cell in common between the first row of cells of the first subset of peripheral cells and the first column of cells of the first subset of peripheral cells; and the cell in common between the second row of cells of the second subset of peripheral cells and the second column of cells of the second subset of peripheral cells.

26. The formwork of any one of claims 1 to 25, wherein: a wall thickness to cell dimension ratio, along a row of cells, is the same as a wall thickness to cell dimension ratio, along a column of cells; and the row of cells and the column of cells have a cell in common.

27. The formwork of any one of claims 1 to 26, comprising a repeated cell structure in which an octagonal cell is adjacent to a rectangular cell.

28. The formwork of any one of claims 1 to 27, wherein one or more octagonal cells are adjacent to two or more rectangular cells.

29. A formwork comprising: a plurality of walls, the walls defining a plurality of cells, each cell extending from a first cell opening to a second cell end; wherein the plurality of cells comprises: a plurality of peripheral cells; and a plurality of internal cells.

30. The formwork of claim 29, wherein each cell extends from the first cell opening of the cell to the second cell end of the cell, in an axial direction.

31. The formwork of claim 29 or claim 30, wherein: the peripheral cells define at least part of a peripheral portion of the formwork; the internal cells define at least part of an internal portion of the formwork; and the peripheral portion of the formwork at least partially surrounds the internal portion of the formwork.

32. The formwork of any one of claims 29 to 31 , wherein the first cell opening and the second cell end of the peripheral cells are closer together than the first cell opening and the second cell end of one or more of the internal cells.

33. The formwork of any one of claims 29 to 32, wherein an axial dimension of one or more of the peripheral cells is less than an axial dimension of one or more of the internal cells.

34. The formwork of claim 33, wherein the axial dimension of a particular cell is a shortest distance, measured in the axial direction, between the first cell opening and the second cell end of the particular cell.

35. The formwork of any one of claims 29 to 34, wherein the plurality of peripheral cells comprises: a first subset of peripheral cells; and a second subset of peripheral cells.

36. The formwork of claim 35, wherein the first subset of peripheral cells comprises: a first row of cells; and a first column of cells.

37. The formwork of claim 36, wherein the first row of cells and the first column of cells comprise a cell in common.

38. The formwork of any one of claims 35 to 37, wherein the first cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the first cell opening of one or more of the internal cells.

39. The formwork of claim any one of claims 35 to 38, wherein the first cell openings of the peripheral cells of the first subset of peripheral cells are coplanar.

40. The formwork of any one of claims 35 to 39, wherein the first cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the first cell opening of one or more of the peripheral cells of the second subset of peripheral cells.

41. The formwork of any one of claims 29 to 40, wherein the cells each comprise a second cell opening, the second cell opening of a cell being at the second cell end of the respective cell.

42. The formwork of claim 41 , when dependent on claim 35, wherein: the second cell openings of the peripheral cells of the first subset of peripheral cells are coplanar; and the second cell openings of the peripheral cells of the first subset of peripheral cells are coplanar with the second cell openings of one or more of the internal cells.

43. The formwork of claim 41 , when dependent on claim 35, or claim 42, wherein the second cell openings of the peripheral cells of the first subset of peripheral cells are axially offset from the second cell openings of the peripheral cells of the second subset of peripheral cells.

44. The formwork of any one of claims 35 to 40, claim 41 when dependent on claim 35, or claim 42, wherein the second cell openings of the peripheral cells of the second subset of peripheral cells are axially offset from: the second cell opening of one or more of the internal cells; and the second cell opening of one or more of the peripheral cells of the first subset of peripheral cells.

45. The formwork of any one of claims 35 to 40, claim 41 when dependent on claim 35, or any one of claims 42 to 44, wherein: the second subset of peripheral cells comprises: a second row of cells; and a second column of cells; and the second row of cells and the second column of cells comprise a cell in common.

46. The formwork of claim 45, when dependent on claim 36, wherein: the first row of cells is parallel to the second row of cells; and the first column of cells is parallel to the second column of cells.

47. The formwork of any one of claims 29 to 46, wherein one or more peripheral cell has a wall in common with one or more other peripheral cell.

48. The formwork of any one of claims 29 to 47, wherein at least one of the walls is a wall of a first peripheral cell and a second peripheral cell.

49. The formwork of claim 41 , wherein the second cell opening of one or more of the peripheral cells is smaller than the first cell opening of the respective peripheral cell.

50. The formwork of claim 41 , or any one of claims 42 to 49 when dependent on claim 41 , wherein the second cell opening of one or more of the internal cells is smaller than the first cell opening of the respective cell.

51. The formwork of any one of claims 29 to 50, further comprising a cantilever wall that defines at least part of a particular cell of the plurality of cells.

52. The formwork of claim 51 , wherein the cantilever wall extends orthogonally away from an axial wall of the formwork.

53. The formwork of claim 51 or claim 52, when dependent on claim 41 , wherein the cantilever wall defines the second cell opening of the particular cell.

54. The formwork of any one of claims 51 to 53, wherein the formwork comprises a plurality of cantilever walls.

55. The formwork of claim 54, wherein one or more of the cantilever walls is parallel with another of the cantilever walls.

56. The formwork of any one of claims 29 to 55, wherein at least some of the cells are arranged into a plurality of rows and a plurality of columns.

57. The formwork of claim 56, wherein a shape of the cells in a particular row is the same as the shape of the other cells in that row.

58. The formwork of claim 56 or claim 57, wherein the plurality of rows comprises alternating rows of: cells of a first shape; and cells of a second shape.

59. The formwork of claim 58, wherein: the first shape is octagonal; and the second shape is rectangular.

60. The formwork of any one of claims 29 to 59, wherein the peripheral cells are octagonal.

61. The formwork of any one of claims 29 to 60, wherein: a volume of one or more of the peripheral cells is less than a volume of one or more of the internal cells; and a volume of one or more of the peripheral cells is greater than a volume of one or more of the internal cells.

62. The formwork of any one of claims 29 to 61 , wherein the plurality of cells comprises one or more connecting cells, the connecting cells being configured to receive part of a second formwork, thereby inhibiting movement between the formwork and the second formwork in at least one direction.

63. The formwork of claim 62, wherein the connecting cells are circular.

64. The formwork of claim 62 or claim 63, wherein the one or more connecting cells are defined, at least in part, by walls that also define at least part of one or more peripheral cells of the first subset of peripheral cells.

65. The formwork of any one of claims 62 to 64, wherein the first cell openings of the one or more connecting cells are coplanar with one or more of the first cell openings of the peripheral cells of the first subset of peripheral cells.

66. The formwork of any one of claims 29 to 65, further comprising one or more projections, the one or more projections being configured to cooperate with another formwork to inhibit relative movement between the formwork and the other formwork.

67. The formwork of claim 66, wherein each of the one or more projections is configured to fit within a corresponding connecting cell of the other formwork.

68. The formwork of claim 66 or claim 67, wherein a shape of one or more of the projections is such that it can be received within a volume that has the same dimensions as one or more of the connecting cells.

69. The formwork of any one of claims 66 to 68, when dependent on claim 35, wherein the one or more projections project outwardly from one or more of the walls defining the peripheral cells of the second subset of peripheral cells.

70. The formwork of claim 69, wherein the one or more projections project away from the first openings of the peripheral cells of the second subset of peripheral cells.

71. The formwork of claim 35, or any one of claims 36 to 70 when dependent on claim 35, wherein the first subset of peripheral cells and the second subset of peripheral cells are mutually exclusive.

72. The formwork of any one of claims 29 to 71 , wherein the walls defining one or more of the peripheral cells form a closed loop.

73. The formwork of any one of claims 29 to 72, wherein the walls defining one or more of the peripheral cells form an open loop.

74. The formwork of any one of claims 29 to 73, further comprising an anchor, the anchor extending from one of the walls that defines a boundary of a peripheral cell.

75. The formwork of claim 74, wherein the anchor extends: in a lateral direction, from a first lateral end that is at the wall from which the anchor extends, to a second lateral end, the second lateral end being a free end of the anchor; and in the axial direction, from a first axial end to a second axial end, the second axial end being a second free end of the anchor.

76. The formwork of claim 74 or claim 75, wherein a lateral dimension of the anchor changes from a minimum lateral dimension at or near the first axial end, to a maximum lateral dimension at an intermediate axial point of the anchor.

77. The formwork of claim 76, wherein the intermediate axial point is coplanar with the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends.

78. The formwork of claim 76 or claim 77, wherein the lateral dimension of the anchor changes from the maximum dimension at the intermediate axial point, to an intermediate dimension at the second axial end of the anchor, the intermediate dimension being less than the maximum dimension.

79. The formwork of any one of claims 76 to 78, wherein the anchor extends from its respective wall, towards one or more other walls of the formwork.

80. The formwork of claim 79, wherein the anchor extends through the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends.

81. The formwork of claim 79 or claim 80, wherein the second axial end of the anchor is further away from the first cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends, than it is from the second cell opening of that peripheral cell.

82. The formwork of any one of claims 79 to 81 , wherein the second cell opening of the peripheral cell defined, in part, by the wall from which the anchor extends, is between the second axial end of the anchor and the first cell opening of that peripheral cell.

83. The formwork of any one of claims 74 to 82, wherein the anchor extends away from the walls of the formwork.

84. The formwork of any one of claims 74 to 83, wherein the formwork comprises at least one anchor for more than one peripheral cell of the second subset of peripheral cells.

85. The formwork of claim 84, comprising two anchors for each of a plurality of the peripheral cells of the second subset of peripheral cells.

86. The formwork of claim 84 or claim 85, when dependent on claim 45, wherein one anchor extends, collectively, from the walls that define at least part of a boundary of the cell in common between the second row of cells of the second subset of peripheral cells and the second column of cells of the second subset of peripheral cells.

87. The formwork of claim 45, when dependent on claim 36, or any one of claims 46 to 86, when dependent on claims 45 and 36, wherein the formwork is symmetrical about an axis of symmetry, the axis of symmetry bisecting: the cell in common between the first row of cells of the first subset of peripheral cells and the first column of cells of the first subset of peripheral cells; and the cell in common between the second row of cells of the second subset of peripheral cells and the second column of cells of the second subset of peripheral cells.

88. The formwork of any one of claims 29 to 87, wherein: a wall thickness to cell dimension ratio, along a row of cells, is the same as a wall thickness to cell dimension ratio, along a column of cells; and the row of cells and the column of cells have a cell in common.

89. The formwork of any one of claims 29 to 88, comprising a repeated cell structure in which an octagonal cell is adjacent to a rectangular cell.

90. The formwork of any one of claims 29 to 89, wherein one or more octagonal cells are adjacent to two or more rectangular cells.

91. The formwork of any one of claims 29 to 90, wherein the formwork is a permanent formwork.

92. A pavement comprising the formwork of any one of claims 1 to 91 .