| abstract |
(57) [Summary] [PROBLEMS] To provide an effect for civil engineering, which has an effect of being superior in a setting promotion effect as compared with a conventional alkali-free setting accelerator. To provide a cement admixture used in the construction field and a cement composition using the same. SOLUTION: A cement admixture containing a soluble compound of a Group 4A element, for example, titanium or zirconium, A cement composition containing the cement admixture and the cement, in which the group 4A element is tetravalent, and the cement admixture. |