Importance

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Abstract

A paving composition comprises a cement binder, a dispersible latex polymer binder, and a mineral aggregate filler such as sand. The filler may be made up of mineral fines such as fly ash, mineral aggregate such as sand, and/or an elastomeric filler such as ground rubber particles. The composition may further include a defoamer, a plasticizer and a dispersible pigment, the latter preferably being a black pigment to color the composition to that of asphalt pavement. Preferably, the composition is in the form of a dry mixture capable of forming a hard patch bonded to an asphalt surface when admixed with water in which the cement binder comprises up to about 15 percent by weight of the mixture, the latex polymer binder comprises up to about 10 percent by weight of the mixture, the elastomeric filler comprises up to about 10 percent by weight of the mixture, the mineral filler comprises up to about 30 percent by weight of the mixture, and the mineral aggregate filler comprises from about 60-98 percent by weight of the mixture. The present invention is directed in particular to use in patching a depression in asphalt pavement by preparing a patching composition as described above, admixing the patching composition with water, filling the depression with the patching composition, and curing the patching composition to form a hardened patch in the pavement. When completed, the hardened, essentially bitumen-free patching composition has a surface conforming substantially to the surface of the surrounding asphalt pavement and is bonded thereto.

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First Claim