Patent ID: 8940670
Filing Date: 2015-01-27
Classification: C04B,C09K,Y02W

Abstract:
1. A cement composition comprising: hydraulic cement, wherein the hydraulic cement is free of fly ash; sub-micron particles consisting of alumina, which are a separate component from the hydraulic cement, wherein the sub-micron particles have a particle size in a range of from about 150 nm to about 950 nm, and wherein the sub-micron particles are present in an amount in a range of from 0.1% to about 10% by weight of the hydraulic cement on a dry basis; latex, wherein the latex comprises at least one material selected from the group consisting of an ethylene-propylene rubber, a styrene-butadiene rubber, a nitrile rubber, a nitrile butadiene rubber, a butyl rubber, a neoprene rubber, a polybutadiene rubber, an acrylonitrile-styrene-butadiene rubber, a polyisoprene rubber, an AMPS-styrene-butadiene rubber, and any combination thereof; and water, in an amount in the range of about 33% to about 200% by weight of the hydraulic cement.