CEMENT DISPERSING AGENT COMPOSITION AND CEMENT COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide: a cement dispersing agent composition which can increase an effect of inhibiting decrease in flowability over time under a high temperature environment above about 30°C and can increase curability under a temperature environment at about 20°C; and a cement composition containing such a cement dispersing agent composition.SOLUTION: A cement dispersing agent composition comprises: a boric acid compound; and a polycarboxylic acid-based copolymer including a structural unit (I) derived from an unsaturated polyalkylene glycol-based monomer (a) represented by a specific general formula, and a structural unit (II) derived from an unsaturated carboxylic acid-based monomer (b) represented by a specific general formula.