Patent ID: 6858075
Filing Date: 2005-02-22
Classification: C04B,Y02W

Abstract:
1. A cement repair composition, said composition comprising in weight percentages: fine aggregates selected from the group consisting of natural sand, manufactured sand and combinations thereof, 50-80%; cement, 10-20%, said cement meeting ASTM C 1157, type GU, “Standard Performance Specification for Blended Hydraulic Cement,” with a Blaine fineness, ASTM C 204 of less than 290 square meters per kilogram, a tricalcium silicate content less than 60%, a tricalcium aluminate content of about 6%, and an alkali content less than 0.6%; reinforcing fibers selected from the group consisting of carbon fibers, ceramic fibers, polyethylene fibers, steel fibers, and fiberglass fibers, 0-5%; and a lithium admixture and at least one further additive, together 0.01-5% said at least one further additive comprising one of (i) an air-entraining admixture; (ii) a chemical additive selected from the group consisting of water-reducing admixtures, retarding admixtures, water-reducing retarding admixtures, water-reducing high-range admixtures, and water reducing high-range retarding admixtures, and (iii) a shrinkage compensating chemical additive.