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 method of constructing a porous pavement structure capable of capturing hydrocarbon contaminants carried by rain water comprising:
applying a layer of recycled glass over a soil surface;
compacting the applied layer of recycled glass to a modified Proctor of at least 90%;
applying a fabric or mesh over the compacted layer of recycled glass;
applying a structure containing a plurality of open-top grid pockets having rigid or semi-rigid upwardly-extending vertical grid walls for receiving and holding a wearing course composition;
filling the grid pockets with a wearing course composition comprising a mixture of recycled glass, aggregate and flexible resin binder; and
curing the adhesive binder.
2. The method of claim 1 , wherein the mixture of recycled glass and aggregate comprises about 30 wt. % to about 80 wt. % recycled glass and about 20 wt. % to about 70 wt. % aggregate.
3. The method of claim 1 , wherein the adhesive binder is a resin binder applied in an amount in the range of about 2 wt. % to about 6 wt. %, based on the combined weight of recycled glass and aggregate.
4. The method of claim 1 , wherein the layer of recycled glass is disposed over the soil surface and has a thickness and sufficient void space between recycled glass particles to provide a detention basin for storm water that penetrates the bound mixture of recycled glass and aggregate.
5. The method of claim 1 , further including excavating said soil surface to a depth at least 12 inches below a frost line to achieve air communication from said excavated depth into the layer of recycled glass, thereby achieving a thermal moderating effect resulting from air rising from below the frost line into said layer of recycled glass.