| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cement admixture which has both excellent water reducing performance and slump retention performance even in a cement composition containing fly ash, slag, etc., is used in a small quantity, and ensures high economical efficiency. <P>SOLUTION: The cement admixture contains two kinds of polymers of a polymer (A) and a polymer (B) having a specific structure as essential components. The polymer (A) and the polymer (B) contain, as essential structural units, a structural unit derived from an unsaturated (poly)alkylene glycol ether monomer (a) and a structural unit derived from an unsaturated carboxylic acid monomer (b) having a carboxyl group and/or a salt thereof as an adsorption group. <P>COPYRIGHT: (C)2012,JPO&INPIT |
