| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cement composition with which a cement hardened body that achieves practical strength can be obtained in a relatively short time at a low cost, while maintaining fluidity for a relatively long time, and a method for manufacturing such the cement hardened body. <P>SOLUTION: The cement composition contains a Portland cement, a polycarboxylic acid-based admixture, and at least one of calcium nitrate and calcium nitrite, wherein the total amount of the calcium nitrate and calcium nitrite is 1.6-5.0 mass% relative to the amount of the Portland cement. <P>COPYRIGHT: (C)2013,JPO&INPIT |
