CEMENT COMPOSITION, PRODUCTION METHOD THEREFOR AND ADMIXTURE FOR CEMENT

摘要

PROBLEM TO BE SOLVED: To obtain a cement composition, on addition of a polycarboxylic acid based high performance AE (Air-Entraining) water-reducing admixture thereto, even if its amount to be added is decided based on fluidity in kneading, which can exhibit the subsequent sufficient fluidity retaining effect, to provide a method for producing the same, and to provide an admixture for cement. SOLUTION: The cement composition comprises a polycarboxylic acid based high performance AE water-reducing admixture, and cement comprising phosphate of 0.1 to 0.3 wt% expressed in terms of P2O5. Further, the cement composition comprises cement, water and a polycarboxylic acid based high performance AE water-reducing admixture, and comprises phosphoric ions of 0.4 to 1.2 wt.% expressed in terms of P2O5in a liquid phase. COPYRIGHT: (C)2004,JPO