FR2635542A1 - IN SITU MANUFACTURING METHOD OF A CONTINUOUS WIRE ARRAY MEMBRANE AND DEVICE USABLE THEREFOR - Google Patents

Abstract

The process used in road technology, comprising the depositing of a layer of binder, the possible interposition of a base course and finally the depositing of a road carpet in the form of a carpet of coated products or of a surface coating, is characterised, according to the invention, in that a continuous fibre or an assembly of continuous fibres forming the reinforcement is projected as a sheet onto the layer of binder. The invention also relates to a device for implementing the process, comprising a movable frame (1) on which means (2) for storing the fibres, means (4) for guiding the fibres and means (5) for ejecting the fibres in the direction of the ground are fastened.

Description

The subject of the present invention is a

  in situ manufacturing of a road membrane armed with continuous son and a device usable for this process., The invention aims in particular the repair of roads and pavements cracked, but applies

  also to the construction of new roads.

  Traditionally the repair of cracked roads or likely to crack (semi-rigid pavements) is achieved by deposition of a layer

  thick asphalt with a high content of bituminous binder.

  These mixes are generally manufactured in a plant and

applied by means of a finisher.

  According to another technique, between the cracked layer and the wearing course - made up of an asphalt or a coating - is interposed a bituminous mortar composed essentially of sand, a

  bituminous binder and fines, over a thickness of

viron i to 3 cm.

  It is also known to use a surface layer or an intermediate layer consisting of a thick bituminous binder and studded with

  aggregates (see for example FR-A-2 231 815).

  According to a more recent technique,

  between the cracked layer and the layer of roll-

  prefabricated geotextile in the factory, possibly

  with a binder. However, these materials present many difficulties because it is not easy to

  satisfactorily roll out geometric rolls

  textiles and to lay the ones whose recovery is tricky to succeed. In addition, this system adapts very poorly to the geometry of the roadway and the support; folds in curves and changes

  of cant, which affect the effectiveness of the complex.

  We have now found a method for the construction or repair of roads and pavements, effective and usable on the desired scale, by creating a road-armed membrane in situ. place on the roadway a network of intertwined wires intimately bound in an asphalt binder. The invention therefore aims to a) to avoid, on cracked roads, the rise of cracks through a tread, while remaining for the latter, in a complex of low thickness; (b) increase in any road surface

  its fatigue resistance to the repetition of soil

  licitations, while maintaining the highest module levels (rigidity); and (c) to seal a structure

art.

  The invention relates to a method for producing

  in situ of an armed road membrane, comprising the placing of a layer of binder, possibly interposition of a base or binding layer and finally the establishment of a wearing course

  in the form of a carpet of asphalt or a super-coated

  characterized in that a wire or a set of wires is projected into a layer on the binder layer.

continuous (s) forming the frame.

  If necessary, we cover this tablecloth

  son of a layer of granulate or a lattice prefabricated

  bricked, possibly with a layer of binder, before

  setting up the next layer or layers.

  According to a variant, simultaneously

  placement of the binder layer and the projection of

  a son or a set of continuous son (s) on it. The binder used for the first layer is either a bitumen or a bitumenpolymer, which can be fluxed or fluidized, and it can be applied using usual materials either hot or cold under

  emulsion form, at a rate of 0.2 to 4 kg / m, preferably

  0.6 to 1.2 kg / m residual binder.

  The yarns used according to the invention may be natural or synthetic yarns, whether or not treated, in particular of polyester, polyamide or polypropylene.

  or in cellulosic derivatives, or in glass. We pre-

  fers the polyester or polyamide threads. They can be

  used in coils or bundles with 1 to 200 single wires

  multi-stranded. Their grade may vary in a wide range from 80 to 5000 decitex, preferably from 150 to 400 decitex. According to the invention, from 30 to

2 2

  400 g / m of yarn, preferably 40 to 120 g / m. The yarns projected at high speed on the binder form with it, in the final road complex, a

waterproof army membrane.

  In order to stabilize the son on the binder, and then be able to circulate on them to achieve the wearing course coming from covering this reinforced membrane, it is preferable to spread on the surface of

  the sheet of threads a clear grid of aggregates. CEL

  it will generally consist of chippings (for example 6/10 mm), spread at a rate of 2 to 10 1 / m2,

  for example, about 5 l / m, but other granulomas

  Trials and dosages are possible. These aggregates do not need to be cylindrical. It is also possible to use a prefabricated trellis, especially a wire mesh or polypropylene. In some

  case a second layer of binder can be applied.

  The wearing course is made from

  usually with prior interposition of a base layer or bond according to the usual techniques. The invention applies both in the case of a carpet of hot mix, as in the case of a surface coating.

  The following examples illustrate the invention

  tion. EXAMPLE 1: Rehabilitation of a very cracked road by

lack of structure.

  We apply to the sprinkler an emul-

  bitumen-polymer (natural latex, such as R Neoflex manufactured by SCREG Sud-Est) at a rate of 1.2 kg / m (ie about 0.8 kg / m residual binder). Polyester yarns (4 decitex yarns of 30 strands each, supplied by Rh6ne-Poulenc) are sprayed onto the binder layer at the rate of 50 g / m 2. by means of a compressed air injector gun,

  to obtain a sheet of entangled son.

  Then we spread a gravel 6/10 reason

of 5 1 / m.

  Finally we realize the wearing course

  by use of a traditional mix (bi-concrete

  0/10) to the paver at a rate of 80 kg / m.

  For comparison, on the same section,

  a carpet of the same asphalt has been poured as above

  above, dosed at 120 kg / m. After the release, the cracks of the support began to reappear, unlike the reinforced plank obtained above

according to the invention.

  EXAMPLE 2: Rehabilitation of a faiencée road at the exit of agglomeration. After spreading a bitumen emulsion at a rate of 1.2 kg / m (0.8 kg / m of residual bitumen), a 330 decitex and 60 strand polyester yarn is sprayed with a compressed air gun. (Rh6ne-Poulenc company), from a beam of 80 son, to

2 2

  because of 80 g / m. It is covered with 5 l / m of 6/10 gravels, then the wearing course is made.

  asphalt concrete (Compoflex from SCREG Sud-

  East), spread at a rate of 80 kg / m2.

  As in Example 1, there is obtained a pavement comprising an armed road membrane (binder + yarn) and combining high qualities of solidity and

flexibility.

  The invention also relates to a device

  device usable in the implementation of the method described above for performing the spraying of a wire or a set of son, characterized in that it comprises a frame, preferably mobile, on which are fixed means storing the wires, the means for guiding the wires and the ejection means

wires, towards the ground.

  The means for storing the wires are constituted

  killed by at least one beam support, preferably

  enslaved by a speed controller of the beam.

  The wire guide means are useful for routing the wires from the beam to the

ejection means son.

  The ejection means of the yarns are especially

  constituted by substantially vertical ejector tubes

  caux, operating with the aid of an air compressor.

  These tubes can be usefully provided with protective housings. Preferably the ejector tubes are arranged via a support on an extensible ramp for scanning a width of

desired route.

  According to one embodiment, the ex-stretchable ramp is formed of a set of rods articulated with each other, the two rods forming the ends of the ramp cooperating with a jack

  allows to adjust the distance of the ramp.

  The following description with regard to

  annexed drawings illustrates an embodiment of the

  positive according to the invention. In these drawings: FIG. 1 is an elevational view of a

  device according to the invention to realize the projection

  ply of a yarn or set of yarns;

  FIG. 2 is a top view of the arrangement

sitive shown in Fig 1.

  In these drawings the device comprises a mobile frame 1 on which are fixed means for storing the wires constituted by a beam carrier 2 controlled by a speed controller 3 of the beam 2 '. means 4 for guiding the yarns and means for ejecting the yarns, making it possible to project it into a sheet on the layer of binder already applied or at the same time.

  The ejection means 5 of the yarns are

  by a set of ejector tubes 6 sensitive-

  vertically, connected to an air compressor 7, and are provided with protective housings 8 (Figure 1). These ejector tubes 6 are arranged via

  their support 9 (Fig. 1) on an extensible ramp

  of a set of links 10 articulated between

  they, the rods of the ends of the ramp co-

  ppering with a cylinder 11 to adjust the scale

  of the ramp according to the width of the entire rebuilding.

Claims (15)

  1. A method of in situ manufacturing of an armed road membrane, including the installation   a binder layer, possibly with interpolating   base layer or bonding and finally the establishment of a wearing course in the form of a carpet of asphalt or a surface coating, characterized in that it is projected into a sheet , on the   layer of binder, a wire or a set of naked (s) forming the frame.   2. The process according to claim 1, wherein   tered in that one covers the sheet of son of a   layer of aggregates or lattice.   3. Method according to claim 2.   as regards the aggregate layer is spread at a rate of 2 to 10 1 / m.   4. Process according to any one of the   1 to 3, characterized in that the placing of the binder layer and the spraying of the wire or the set of continuous son (s).   5. Process according to any one of the   1 to 4, characterized in that the binder is applied at a rate of 0.2 to 4 kg / m   6. Process according to claim 5,   in that the binder is applied at a rate of 0.6 at 1.2 kg / m residual binder.   7. Process according to any one of the   1 to 6, characterized in that the wires are polyester or polyamide.   8. Process according to any one of the   1 to 7, characterized in that at 400 g / m2 of threads.   9. The method of claim 8, wherein   in that 40 to 120 g / m of yarn are used.   10. Process according to any one of   Claims 1 to 9, characterized in that the yarns have a grade of 80 to 5000 decitex. 11. Device usable in the implementation   process according to any of the claims   cations 1 to 10 for effecting the spraying of a wire or a set of wires, characterized in that it comprises a frame (1), preferably movable, on which are fixed storage means (2) wires, guide means (4) for wires and means   ejecting (5) the wires, towards the ground.   12. Device according to claim 11, characterized in that the wire storage means are constituted by at least one beam support (2), slaved by a speed controller (3) of the beam. 13. Device according to claim 11 or 12, characterized in that the ejection means of the   son consist of ejector tubes (6) sen-   vertically, operating with the aid of a air compressor (7).   14. Device according to any one of   claims 11 to 13, characterized in that the   ejector tubes (6) are arranged on an extended ramp   formed of a set of links (10) articulated Lées.   15. Device according to claim 14.   characterized in that the two rods forming the ends of the ramp cooperate with a jack (11)   to adjust the gap of the ramp.