GAMMA-DICALCIUM SILICATE-CONTAINING CEMENT COMPOSITION

摘要

The cement compsn. comprises 100 wt.% of a hydraulic cement material contg. at least 60 wt.% of gamma-dicalcium silicate (-C2S) and 1-20 wt.% of a water-dispersible polymeric material. The cement material contains 40 wt.% or less of an additional cement material, esp. an alumina cement or consists of gamma-dicalcium silicate alone. The polymeric material is at least one of vinyl acetate homo- and co- polymers, (meth) acrylamide homo- and copolymers, non-ionic alkyl cellulose esters, non-ionic hydroxyalkyl cellulose esters, polyalkylene oxide polymer derivs., polyalkoxyl polymer derivs., and polymers contg. sulfonic acid groups.