CEMENT ADMIXTURE, CEMENT COMPOSITION AND METHOD FOR LAYING WORK THE SAME, AND METHOD FOR PRODUCING CEMENT HARDENED PRODUCT

摘要

The cement admixture of the present invention can provide viscosity decreasing ability as well as a high dispersing ability and slump loss preventing ability even in a high water reducing ratio range. The above-mentioned cement admixture comprises three components of a copolymer (A) containing a constituent unit (I) derived from the unsaturated (poly)alkylene glycol ether monomer (a) and a constituent unit (II) derived from a maleic acid monomer (b), a specific unsaturated (poly)alkylene glycol ether monomer (a) and a non-polymerizable (poly)alkylene glycol (B) having no alkenyl group, and the cement admixture further comprises specific additive.