Back to results
US 5,244,304 AGranted
Cement based patching composition for asphalt pavement
AssigneeAmerican Stone-Mix, Inc.
InventorsEd Weill, Geoffrey A. Crenson
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAmerican Stone-Mix, Inc.
InventorsEd Weill, Geoffrey A. Crenson
Estimating the term…
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.
A dry composition for repairing asphalt pavement comprising a mixture of:
A dry mixture capable of forming a hard patch bonded to an asphalt surface when admixed with water comprising:
A method of patching a depression in asphalt pavement comprising the steps of:
A pavement surface comprising an asphalt pavement surface having a shallow depression in a portion thereof, said depression being filled with a hardened patching composition made by reacting a mixture of a cement binder in an amount less than 20% by weight of said mixture, a dispersible latex polymer binder, a filler, a defoamer in an amount no greater than about 5 percent by weight of said mixture, a plasticizer in an amount no greater than about 5 percent by weight of said mixture, and a dispersible pigment in an amount no greater than about 5 percent by weight of said mixture with water, said patching composition having a surface conforming substantially to the surface of the surrounding asphalt pavement and being bonded thereto.
Dependencies are inferred from the claim text.