| 摘要 |
PROBLEM TO BE SOLVED: To provide a cement admixture having advantages such as excellent expansion performance, good storage stability and capability of maintaining high quality over a long period, and also to provide a cement composition containing the cement admixture. SOLUTION: This cement admixture comprises an expansive material containing, as its main constituent compounds, free lime, calcium aluminoferrite and anhydrous gypsum, and fatty acids and/or their salts. The cement composition comprises cement and the cement admixture. |
