| abstract |
(57) [Problem] To provide a cement admixture for injection and an injection material capable of preventing generation of scale, prolonging kneading time and shortening gelation time. SOLUTION: A cement admixture for injection containing calcium aluminate, gypsum and aluminum sulfates. Furthermore, you may contain a strength promoter and a setting retarder. An injection material containing an A agent containing calcium aluminate, gypsum, and aluminum sulfate, and an B agent containing cement. |