| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cement composition for injection, attaining water resistance, sticking property and strength development that prevent cement milk from flowing into ground water or flowing out and deviating from a prescribed injection position. <P>SOLUTION: The cement composition contains cement, calcium aluminate, gypsum, a vinyl acetate-vinyl versatate-acrylic ester copolymer, a setting modifier and a cellulose derivative. A water reducing agent can be incorporated. A cement milk can be formed by containing the cement composition for injection and water. <P>COPYRIGHT: (C)2010,JPO&INPIT |
