Hydrocarbon-adsorbing porous pavement structure
View Patent ↗A water-pervious pavement structure comprising wearing course comprising a water-pervious combination of recycled glass and aggregate bound together with a flexible adhesive binder and held within a plurality of connected, open grid pockets; and a layer of unbound recycled glass disposed under the wearing course capable of adsorbing contacting hydrocarbons carried with water through the wearing course. In a preferred embodiment, the wearing course comprises about 30 wt. % to about 80 wt. % recycled glass and about 20 wt. % to about 70 wt. % aggregate bound together by a cured resin binder within the grid pockets.
1. A water-pervious pavement structure comprising:
(a) wearing course comprising a water-pervious combination of recycled glass particles and aggregate particles bound together with a flexible adhesive binder and held within a plurality of connected, open grid pockets;
(b) a layer of unbound recycled glass disposed directly under the wearing course capable of adsorbing contacting hydrocarbons carried with water through the wearing course; and
(c) a caisson or aperture excavated under the layer of unbound recycled glass to a depth below a frost line to achieve a thermal moderating effect resulting from air rising, through said aperture and into said unbound recycled glass layer.
2. The pavement structure of claim 1 , wherein the wearing course comprises about 30 wt. % to about 80 wt. % recycled glass and about 20 wt. % to about 70 wt. % aggregate bound together by a cured resin binder within the grid pockets.
3. The pavement structure of claim 2 , wherein the resin binder is present on an upper surface of the wearing course in an amount in the range of about 0.2 ounce to about 10 ounces per ft 2 of wearing course surface area.
4. The pavement structure of claim 3 , where the resin binder is present on the upper surface of the wearing course in an amount in the range of about 0.5 ounces to about 5 ounces per ft 2 of wearing course surface area.
5. The pavement structure of claim 1 , wherein the wearing course has a compressive strength of at least 800 psi.
6. The pavement structure of claim 5 , wherein the wearing course has a compressive strength of at least 900 psi.
7. The pavement structure of claim 1 , wherein the layer of unbound recycled glass disposed under the wearing course has a thickness and a void space between unbound recycled glass particles to provide a detention basin for storm water that penetrates the wearing course.
8. The pavement structure of claim 1 , wherein the aggregate is chip seal aggregate.
9. The pavement structure of claim 1 , including a stormwater detention basin disposed directly below the layer of unbound recycled glass.
10. The pavement structure of claim 1 , wherein the recycled glass particles have a size in the range of about 1/16 inch to about 2 inches.
11. The pavement structure of claim 1 , wherein the recycled glass particles have a size in the range of about ¼ inch to about ½ inch.
12. The pavement structure of claim 1 , wherein the aggregate particles have a size in the range of about 1/16 inch to about 1 inch.
13. The pavement structure of claim 1 , wherein the aggregate particles have a size in the range of about ¼ inch to about ½ inch.
14. The pavement structure of claim 13 , wherein both the glass particles and the aggregate particles have a size of about ⅜ inch.
15. The pavement structure of claim 1 , wherein the wearing course further comprises a fabric layer beneath the open grid pockets.