Patent ID: 7125199

Claim:
Elastic permeable pavement for use on new roads comprising a land layer; a filter layer comprising small aggregates; a base layer comprising rubbles for concrete of the rubble size 25 mm or less; a permeable concrete layer comprising aggregates of the size in the range of 5–13 mm, cement, water and admixture products; a primer layer; and an elastic layer from the bottom to the surface, wherein the permeable concrete layer has the compressive strength of 100 kg/cm 2 or more and the permeability coefficient of 1×10 −3 cm/sec or more; the primer layer comprises 10–20% by weight of polypropylene glycol, 5–10% by weight of trimethylol propane, 5–10% by weight of 1,3-butylene glycol, 15–25% by weight of toluene diisocyanate, 49–64.9% by weight of a solvent which is either xylene or methylethylketone and 0.1–1.0% by weight of a deoaming agent; and the elastic layer is prepared by mixing waste-polyurethane chips and a binder in the weight ratio of 3:1 to 4:1, the waste-polyurethane chips having the size of 1 to 5 mm, and the binder comprising 50–70% by weight of polypropylene glycol, 5–10% by weight of polybutadiene glycol, 3–5% by weight of 1,3-BG, 20–30% by weight of methylene diisocyanate and 2–5% by weight of toluene diisocyanate.