HIGH STRENGTH CEMENT ADMIXTURE AND CEMENT COMPOSITION USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a high strength cement admixture giving cement high strength while maintaining good workability, and to provide a cement composition using it. SOLUTION: This cement admixture (1) comprises a high performance water reducing agent and polyvinylacetate as the main component, (2) further comprising gypsum and/or calcium carbonate in addition to (1), (3) further comprising an active silica in addition to (1) or (2). This cement composition comprises either of high performance cement admixtures from (1) to (3) blended with cement.