Patent ID: 8017672
Filing Date: 2011-09-13
Classification: C04B,Y02W,Y10T

Abstract:
1. A polymer-cement composite comprising: about 12 to about 23 weight percent latex, the latex including polymer solids and water; about 20 to about 25 weight percent portland cement, the cement being present in an amount sufficient to provide a weight ratio of water to cement of up to about 0.49 and a ratio of latex polymer solids to cement (ls/c) of between 0.3 and 0.6, calcium hydroxide being produced when the cement is hydrated with water; filler in an amount sufficient to provide a weight ratio of filler to cement of about 1.90 to about 2.10; and about 6 to about 15 weight percent reactive silica to react with the calcium hydroxide.