| 摘要 |
PROBLEM TO BE SOLVED: To provide a cement admixture and a cement composition used for civil engineering and construction, which are superior to conventional alkali-free set accelerating agents in set accelerating effects, etc. SOLUTION: The admixture contains a soluble compound of 4A group element, e.g. titanium, zirconium or a tetravalent 4A group element. The cement composition contains cement and the admixture. |
