Claims
- 1. A process for reinforcing paving in which a second layer of paving is placed on top of a first layer of paving, the process comprising:
- selecting an open grid reinforcement of multi-filament reinforcing strands in substantially parallel alignment, the grid being in the form of a roll, wherein a resin has been applied to the strands of the grid and an activatable adhesive has been applied to the resin on one side of the grid;
- continuously unrolling the grid, adhesive side down, essentially directly, evenly and flatly onto the first layer of paving, while maintaining the respective strands of the grid in substantially parallel alignment;
- activating the adhesive by applying one of heat and pressure to adhere the grid in place to the first paving layer and substantially to eliminate bubbles, raised portions or sideways distortion of the strands of the grid before and during application of the second layer; and
- applying the second layer of paving on top of the grid and the first layer, the second paving layer passing through openings in the grid so that the grid openings provide for significant and substantially direct contact between the first and second paving layers.
- 2. The process of claim 1, wherein the adhesive coating is applied to a portion of the one side of the resin-applied grid.
- 3. The process of claim 1, further comprising applying the adhesive coating to the grid primarily for the purpose of being activated for forming a tack coat free bond compatible with asphaltic paving.
- 4. The process of claim 1, in which tack coat is applied to the layer of paving to be reinforced before or after the grid is laid on top of that layer.
- 5. The process of claim 1, wherein the resin-applied grid has a strength of at least 25 kiloNewtons per meter in the direction of each set of parallel strands.
- 6. The process of claim 1, wherein further comprising selecting as the multi-filament reinforcing strands, low-twist glass fibers.
- 7. The process of claim 6, in which the glass fibers range in weight from about 300 to about 5000 tex.
- 8. The process of claim 1, wherein the openings in the grid are substantially rectangular and are between about 1/8 inch to about six inches on a side.
- 9. The process of claim 1, further comprising affixing the strands of the grid at the cross-over points before applying the resin to the grid.
- 10. The process of claim 9, wherein the affixing step comprises stitching grid intersections together by warp-knit, weft-insertion knitting.
- 11. The process of claim 1, wherein the grid weighs between approximately 4 and 18 ounces per square yard.
- 12. The process of claim 1, wherein the grid is non-woven.
- 13. The process of claim 12, further comprising affixing grid intersections with adhesive.
- 14. The process of claim 1, wherein the impregnating resin is compatible with asphaltic paving.
- 15. The process of claim 14, wherein the impregnating resin is selected from the group consisting of asphalt, rubber modified asphalt, unsaturated polyesters, vinyl ester, epoxies, polyacrylates, polyurethanes, polyolefines and phenolics.
- 16. The process of claim 1, wherein the activatable adhesive is a synthetic material.
- 17. The process of claim 16, wherein the synthetic activatable adhesive is selected from synthetic elastomeric and synthetic thermoplastic adhesives.
- 18. The process of claim 1, wherein the activatable adhesive has a tack at the time of application to the grid greater than about 700 gm/cm.sup.2.
- 19. The process of claim 1, wherein the activatable adhesive has a softening point greater than about 140.degree. F.
- 20. The process of claim 1, in which the adhesive retains significant shear strength between the ambient temperature at which it is installed and the temperature to which it is raised when the second layer of asphaltic paving is applied to it.
- 21. The process of claim 1, wherein the adhesive is applied to the grid to impart a shear strength to the grid of at least 30 pounds per linear foot when applied to the paving surface.
- 22. The process of claim 1, wherein the strands of the open grid comprise one set of substantially parallel fibers extending in a lengthwise direction and one set extending transversely to the lengthwise direction and wherein the step of unrolling the grid onto the paving to be reinforced comprises orienting the grid such that the lengthwise set of substantially parallel strands is parallel to the paving to be reinforced and the set extending transversely to the lengthwise direction extends transverse to the paving to be reinforced.
- 23. The process for reinforcing paving according to claim 1, in which the grid is free from significant shrinkage during the step of applying the second paving layer.
- 24. The process for reinforcing paving according to claim 1, in which the resin has been applied to the strands after the strands have been formed into a grid.
- 25. The process for reinforcing paving according to claim 1, in which the strands of the grid are fixed at cross-over points, and the grid is semi-rigid due to application of the resin.
Parent Case Info
This application is a continuation of application, Ser. No. 07/852,537, filed Mar. 17, 1992, now U.S. Pat. No. 5,246,306, which application is a continuation of prior application, Ser. No. 07/745,970, filed Aug. 12, 1991, now U.S. Pat. No. 5,110,627, which application is a continuation of prior application, Ser. No. 07/558,153, filed Jul. 26, 1990, now abandoned, which application is a divisional of prior application, Ser. No. 07/116,351, filed Nov. 4, 1987, now U.S. Pat. No. 4,957,390.
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Entry |
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Divisions (1)
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Number |
Date |
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Parent |
116351 |
Nov 1987 |
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Continuations (3)
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Date |
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852537 |
Mar 1992 |
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Parent |
745970 |
Aug 1991 |
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Parent |
558153 |
Jul 1990 |
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