CEMENT ADMIXTURE HAVING HIGH WATER-REDUCING EFFECT AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a cement admixture which can impart high fluidity to a cement composition even in a high-water-reducing ratio region because of its ability to improve the dispersion stability of cement particles and impart good workability to the cement composition because of its ability to prevent the attained fluidity from lowering with time and to continuously entrain a suitable amount of air and to provide a method for producing the same. SOLUTION: A cement admixture, more particularly, a cement admixture containing at least either of a carboxylic acid copolymer containing a reactive surfactant as a monomer and a copolymer salt obtained by neutralizing the copolymer with an alkaline substance is provided. A method for producing the same and a cement composition using the same are also provided. The cement admixture can impart high fluidity to a composition even in a high water-reducing-ratio region because of its ability to improve the dispersibility of cement particles and impart good workability to a cement composition because of its ability to prevent the attained fluidity from lowering with time and to continuously entrain a suitable amount of air. Therefore, the cement composition can form high-strength concrete. COPYRIGHT: (C)2005,JPO&NCIPI