NL2025811B1 - Method for improving the curing of poured concrete - Google Patents
Method for improving the curing of poured concrete Download PDFInfo
- Publication number
- NL2025811B1 NL2025811B1 NL2025811A NL2025811A NL2025811B1 NL 2025811 B1 NL2025811 B1 NL 2025811B1 NL 2025811 A NL2025811 A NL 2025811A NL 2025811 A NL2025811 A NL 2025811A NL 2025811 B1 NL2025811 B1 NL 2025811B1
- Authority
- NL
- Netherlands
- Prior art keywords
- layer
- concrete
- cured
- bubble
- reflective layer
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 125000006850 spacer group Chemical group 0.000 claims abstract description 27
- 230000005855 radiation Effects 0.000 claims abstract description 17
- 239000011888 foil Substances 0.000 claims description 63
- 239000004033 plastic Substances 0.000 claims description 29
- 229920003023 plastic Polymers 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 241000206607 Porphyra umbilicalis Species 0.000 description 4
- 240000000491 Corchorus aestuans Species 0.000 description 3
- 235000011777 Corchorus aestuans Nutrition 0.000 description 3
- 235000010862 Corchorus capsularis Nutrition 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/04—Preventing evaporation of the mixing water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
A method for improving the curing of poured concrete comprises the step of placing a waterproof layer adjacent a surface of the concrete to be cured. The method comprises the use of a waterproof layer comprising: - an infrared reflective layer reflecting at least 80%, preferably at least 90%, more preferably at least 95% of thermal radiation of the concrete to be cured, - a spacer to keep the reflective layer spaced apart from the surface of the concrete to be cured at a distance of least 5 millimetre.
Description
Method for improving the curing of poured concrete
FIELD OF THE INVENTION The invention relates to a method for improving the curing of poured concrete, the method comprises the step of placing a waterproof layer adjacent a surface of the concrete to be cured.
BACKGROUND OF THE INVENTION After concrete is being poured, the concrete will cure due to a chemical reaction between a chemically inert mineral aggregate (usually sand, gravel, or crushed stone), a binder (natural or synthetic cement), chemical additives, and water. If the concrete dries too fast, for example due to undesired evaporation of the water in the concrete, the concrete after curing will have a relatively low quality whereby a.o. undesired fissures in the surface of the concrete or cracking in the concrete can occur. To prevent undesired evaporation it is known in the art to place a waterproof foil against a surface of the concrete to be cured. A disadvantage of such a foil like a bubble foil or relatively thick plastic layer is that it is transparent for infrared light due to which heat in the curing concrete will be emitted through the foil and get lost for the curing of the concrete. It is also known to put a layer of jute fabric on the surface of the concrete to be cured. A disadvantage of such a method is that water in the jute fabric will evaporate and need to be replenished by adding additional water to keep the jute fabric is wet.
At least one of the objectives of the invention is to provide a method for improving the curing of concrete, whereby with simple means a better control of the curing will be obtained.
This objective is accomplished with the method according to the invention in that the method comprises the use of a waterproof layer comprising: - an infrared reflective layer reflecting at least 80%, preferably at least 90%, more preferably at least 95% of thermal radiation of the concrete to be cured, - a spacer to keep the reflective layer spaced apart from the surface of the concrete to be cured at a distance of least 5 millimetre.
Due to the reflective layer lying spaced apart from the surface of the concrete to be cured by the spacer the heat released by the concrete during the chemical process of curing, will be reflected back as infrared radiation towards and into the concrete to be cured. This has the advantage that no additional heating means are needed. In case that the concrete in manufactured in a room of a factory, the room need not to be heated.
It has found out that the distance of about 5 millimetre between the reflective layer and the surface of the concrete to be cured is the minimum required distance to reflect the infrared radiation from the concrete by the reflective layer and back into the concrete. Up to a distance of about 30 millimetre an improvement of the reflection of the infrared radiation occurs. Between 30 millimetre and 800 millimetre a satisfactory reflection of infrared radiation will still occur.
Tests have proven that the tensile strength of the concrete cured according to the method of the invention is about 15-20% higher as concrete being cured according to the prior art.
The reflective laver can be a plastic foil made of PET and coated with aluminum or other metal on one or both sides. The reflective layer can also comprise only a metal foil. Such a reflective layer can be waterproof by itself.
The spacer can be located between the reflective layer and the surface of the concrete to be cured or can be located alongside the surface of the concrete to be cured. When the spacer is located between the reflective layer and the surface of the concrete to be cured all parts of the spacer located between the reflective layer and the surface of the concrete to be cured need to be transparent for infrared. This has the advantage that thermal infrared radiation of the concrete to be cured, will be go through the spacer, be reflected by the reflective foil, will be go again through the spacer and go back into the concrete.
If the spacer is located alongside the surface of the concrete to be cured, the spacer does not need to be transparent for infrared. The spacer will create an open space between the reflective layer and the surface of the concrete to be cured. This has the advantage that thermal infrared radiation of the concrete to be cured, will go through a space created by the spacer, be reflected by the reflective foil, go again through the space and go back into the concrete.
Due to the reflection of as much infrared radiation back towards and into the concrete a more homogeneous structure of the concrete is obtained.
Due to the reflective layer no additional heating of the surface is needed. In case that the reflective layer is also reflective on the outside, when concrete is curing in the outside during a sunny day, the sun light is being reflected by the outside of the reflective layer and too fast curing of the concrete is easily prevented.
Furthermore, it has found out that without the spacer, whereby the infrared reflective layer is located directly against the surface of the concrete to be cured, the reflective layer will get hot due to conduction caused by the direct contact between the infrared reflective layer and the surface of the concrete to be cured. Due to the spacer, heat transfer caused by conduction is being prevented.
The use of such waterproof layer for improving the curing of concrete provides unexpected advantages like the formation of a saturated Jayer of air, the formation of a heat pack on the surface and the reflection of the thermal heat back into the concrete. Less cracks and a higher hardness of the concrete are obtained.
The spacer can for example be made of a relatively thick layer of plastic or a relatively thick mesh being transparent to infrared radiation. However, it is also possible to mount the reflective layer in a frame and to position the frame near the surface of the concrete to be cured, whereby the frame keeps the reflective Javer at the required distance from the surface.
An embodiment of the method according to the invention is characterized in that the infrared reflective layer comprises a metal film, wherein the metal comprises at least one element from the group comprising copper, aluminum, cobalt, nickel, silver or gold, or an alloy comprising at least one of these elements.
Such materials reflect infrared radiation well and, make it possible to realize a reflection of more than 80 to 97% of the infrared radiation.
Another embodiment of the method according to the invention is characterized in that the spacer comprises at least one bubble foil provided with a flat plastic layer and a plastic layer with bubbles attached to the flat layer, whereby the bubble foil is positioned between the reflective layer and the surface of the concrete to be cured.
The bubble foil forms an easy means to form a spacer. The bubble foil is made for example of plastic like low density polyethylene. Such bubble foil provides a waterproof Jayer on the surface of the concrete to be cured. Since the bubble foil is positioned between the reflective layer and the surface of the concrete to be cured, the reflective foil is located at the required distance of the surface of the concrete to be cured.
The bubble foil will not or nearly not conduct heat from the concrete to be cured to the reflective layer. Due to the thermal insulation effect of the bubble foil in combination with the reflective foil reflecting the infrared radiation from the concrete to be cured, the surface of the concrete to be cured does not cool down and maintains a relative high temperature due to which a better curing of the concrete occurs and fissures in the surface and cracking of the concrete are prevented.
Another embodiment of the method according to the invention is characterized in that the bubbles of the bubble foil are directed towards the reflective layer, whilst the flat plastic layer is located adjacent to the surface of the concrete to be cured.
Bv positioning the flat plastic layer adjacent to the surface of the concrete to be cured and the bubbles against the reflective layer, the contact surface between 5 the bubble foil and the reflective layer is minimized due to which conduction of heat, if any, between the bubble foil and the reflective layer is minimized. Furthermore, positioning the flat plastic layer adjacent to the surface of the concrete to be cured, it is prevented that the bubbles leave an impression in the concrete.
Another embodiment of the method according to the invention is characterized in that the spacer comprises at least one additional bubble foil provided with a flat plastic layer and a plastic layer with bubbles attached to the flat layer, wherein the additional bubble foil is located between the reflective layer and the at least one bubble foil.
Due to the additional bubble foil a thicker heat pack is obtained.
Another embodiment of the method according to the invention is characterized in that the waterproof layer comprises at least one further bubble foil provided with a flat plastic layer and a plastic layer with bubbles attached to the flat layer, wherein the further bubble foil is located on a side of the reflective Jayer remote of the at least one bubble foil.
This has the advantage that both sides of the waterproof layer can be used so that when placing the waterproof layer on the surface, there will be automatically a bubble foil between the reflective layer and the surface. When using the waterproof layer, the side being in contact with the concrete will get dirty. After removal the waterproof layer from the concrete, the waterproof layer can be used again on another surface of concrete to be cured, thereby using the other side of the waterproof layer.
Another embodiment of the method according to the invention is characterized in that the waterproof layer comprises at least one mesh being transparent to infrared located on the outside of the waterproof layer.
In case that a bubble foil is used as a spacer, the bubble foil is Jocated between the mesh and the concrete to be cured. The bubble foil is made of relatively thin plastic, which can easily rupture or tear when trying to pull in tight on the surface of the concrete to be cured. A mesh made of a more sturdy material can easily prevent that the bubble foil will get damaged. The mesh is transparent to infrared so that it does not hinder the infrared radiation from the concrete to be reflected by the reflective layer and transmitted back into the concrete.
BRIEF DESCRIPTION OF THE DRAWINGS The method according to the invention will further be explained with reference to the drawings, wherein, figure 1 is a side view of a first embodiment of the method according to the invention, figure 2 is a side view of a second embodiment of the method according to the invention, figure 3 is a side view of a third embodiment of the method according to the invention, figure 4 is a side view of a fourth embodiment of the method according to the invention. In the drawings, like reference numerals refer to like elements.
DESCRIPTION OF PREFERRED EMBODIMENTS Figure 1 shows a first embodiment of the method according to the invention, whereby a waterproof laver is placed on a surface 2 of a layer 3 of poured concrete. The layer 3 of concrete is poured in a well known manner. After poring the concrete, the waterproof layer 1 is placed on top of the surface 2 of the layer 3 of poured concrete. The waterproof layer 1 comprises an infrared reflective laver 4 reflecting at least 80%, preferably at least 90%, more preferably at least 95% of thermal radiation of the layer 3 of poured concrete to be cured. The waterproof layer 1 also comprises a spacer being transparent to infrared to keep the reflective layer 4 spaced apart from the surface 2 of the layer 3 of poured concrete to be cured at a distance D of least 5 millimetre.
The spacer comprises a bubble foil 5 provided with a flat plastic layer 6 and a plastic layer with bubbles 7 attached to the flat layer 6, whereby the bubble foil 5 is positioned between the reflective layer 4 and the surface 2 of the concrete to be cured. As can be seen in figure 1, the bubbles 7 of the bubble foil 5 are directed towards the reflective layer 4, whilst the flat plastic layer 6 is located on the surface 2 of the concrete to be cured.
The bubble foil 5 has a thickness of at least 5 millimetre.
In figure 1 and also in the other figures, the surface 2, the bubble foil 5 and the reflective layer 4 are shown spaced apart to better shown the different elements. In reality, the bubble foil 5 may rest on the surface 2 and the bubble foil 5 and the reflective layer 4 may be interconnected to provide a single waterproof layer 1.
The bubble foil 5 and the reflective layer 4 may be loosely connected to each other, for example by means of pins being used to connect a tag to a piece of clothing.
The reflective layer 4 comprises a plastic substrate layer onto which on both sides an aluminum film has been vapour-deposited. However, it is also possible to provide only one side of the plastic substrate layer with an aluminum film, The aluminum film has a thickness of 7 micron, for example. Such an infrared reflective layer 4 reflects at least 80%, preferably at least 90%, more preferably at least 95% of thermal infrared radiation. Instead of aluminum, also another metal film like copper, cobalt, nickel, silver or gold, or an alloy comprising at least one of these elements can be used.
Preferably the distance D is the same at every position of the surface 2. However, also at a variation of distance over the surface of for example between 5 and 30 millimetre, a homogeneous curing of the layer 3 of concrete will occur.
Figure 2 shows a second embodiment of the method according to the invention, which differs from the first embodiment in that the waterproof laver 8 comprises at least one further bubble foil 5’ provided with a flat plastic layer 6 and a plastic layer with bubbles 7 attached to the flat layer 6, wherein the further bubble foil 5’ is located on a side of the reflective layer 4 remote of the bubble foil 5 located adjacent to the layer 3 of concrete.
The further bubble foil 5’ will be used as a spacer when the waterproof layer 8 is placed upside down on a next layer 3 of poured concrete.
Figure 3 shows a third embodiment of the method according to the invention, which differs from the first embodiment in that the waterproof layer 9 comprises not only the infrared reflective layer 4 and the bubble foil 5 but also a mesh 10 located between the bubble foil 5 and the layer 3 of poured concrete.
The mesh 10 is transparent to infrared.
The main purpose of the mesh 10 is to protect the relatively thin Jayer of the bubble foil 5 directed towards the Javer 3 of poured concrete, for example when the waterproof layer 9 is slit over the layer 3 of poured concrete.
Openings in the mesh can be as small or large as desired.
Figure 4 shows a fourth embodiment of the method according to the invention, which differs from the second embodiment in that the waterproof Jayer u comprises the infrared reflective layer 4, the two bubble foil 5, 5’ and also two additional bubble foils 57, 57, whereby by all bubble foils the bubbles 7 of the bubble foil 5, 5’, 57, 5” are directed towards the reflective layer 4. The additional bubble foils 57, 57” are located between the reflective layer 4 and the bubble foil 5, 5’ respectively.
By the embodiments as shown in the figures 1-4 the waterproof layers are located against the surface 2 of the layer 3 of poured concrete to be cured.
However, it is also possible to maintain the waterproof layers at a distance from the surface 2 of the layer 3 of poured concrete to be cured.
This can, for example, be realised by connecting at least two sides of the waterproof layers to rods, which rods rest on bars extending perpendicular to the rods. The bars are located alongside sides of the layer 3 of poured concrete to be cured and extend above the surface 2 of the layer 3. The distance between the waterproof layers and the surface 2 of the layer 3 of poured concrete to be cured can be up to 80 centimetre but is preferably less than 50 centimetre, more preferably less than 10 centimetre as long as the reflective layer 4 is at least 5 millimetre spaced apart from the surface 2 of the layer 3 of poured concrete to be cured. The most preferably distance is between 5 and 30 millimetre. If the waterproof layer is not located against the surface 2 of the layer 3 of poured concrete to be cured, it is also possible to use only the reflective layer 4 and no bubble foils 5.
It is also possible to direct the bubbles 7 of the bubble foil 5 towards the surface 2 of the concrete to be cured, whilst the flat plastic layer 6 is located against the reflective layer 4.
Instead of a mesh 10, it is also possible to use a sturdy foil being transparent to infrared and sturdy enough to protect the spacer like the bubble foil.
LIST OF REFERENCE SIGNS 1 waterproof layer 2 surface 3 layer 4 reflective layer 5 bubble foil 5 bubble foil 57 bubble foil 5777 bubble foil 6 flat layer 7 bubbles
8 waterproof layer 9 waterproof layer 10 mesh 11 waterproof layer D distance
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2025811A NL2025811B1 (en) | 2020-06-11 | 2020-06-11 | Method for improving the curing of poured concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2025811A NL2025811B1 (en) | 2020-06-11 | 2020-06-11 | Method for improving the curing of poured concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL2025811B1 true NL2025811B1 (en) | 2022-02-16 |
Family
ID=71995014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2025811A NL2025811B1 (en) | 2020-06-11 | 2020-06-11 | Method for improving the curing of poured concrete |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL2025811B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549956A (en) * | 1995-04-06 | 1996-08-27 | Handwerker; Gary | Heat reflective blanket |
| US5855978A (en) * | 1997-05-16 | 1999-01-05 | Midwest Canvas Corp. | Concrete cure blanket having integral heat reflective means |
| US20050031832A1 (en) * | 2003-08-08 | 2005-02-10 | Sealed Air Corporation (Us) | Multi-layer conductive/insulation pad |
| WO2010019033A1 (en) * | 2008-08-12 | 2010-02-18 | Groenzoom N.V. | Layered thermal insulation material |
| US7815991B2 (en) * | 2002-02-19 | 2010-10-19 | Midwest Canvas Corporation | Concrete cure blanket having reflective bubble layer |
| US8855803B2 (en) * | 2012-09-25 | 2014-10-07 | Romeo Ilarian Ciuperca | Method for electronic temperature controlled curing of concrete and accelerating concrete maturity or equivalent age of precast concrete structures and objects |
-
2020
- 2020-06-11 NL NL2025811A patent/NL2025811B1/en active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549956A (en) * | 1995-04-06 | 1996-08-27 | Handwerker; Gary | Heat reflective blanket |
| US5855978A (en) * | 1997-05-16 | 1999-01-05 | Midwest Canvas Corp. | Concrete cure blanket having integral heat reflective means |
| US7815991B2 (en) * | 2002-02-19 | 2010-10-19 | Midwest Canvas Corporation | Concrete cure blanket having reflective bubble layer |
| US20050031832A1 (en) * | 2003-08-08 | 2005-02-10 | Sealed Air Corporation (Us) | Multi-layer conductive/insulation pad |
| WO2010019033A1 (en) * | 2008-08-12 | 2010-02-18 | Groenzoom N.V. | Layered thermal insulation material |
| US8855803B2 (en) * | 2012-09-25 | 2014-10-07 | Romeo Ilarian Ciuperca | Method for electronic temperature controlled curing of concrete and accelerating concrete maturity or equivalent age of precast concrete structures and objects |
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