| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an early expansive cement composition having high expansion rate in the material age of one day and for details, to provide such composition capable of demolding in the material age of one day, having high expansion rate in the same material age and having less concern about occurrence of crack due to drying shrinkage. <P>SOLUTION: The early expansive cement composition contains cement, an expansive material, the powder of amorphous aluminosilicate mineral and gypsums in specific ratios. Further, the amorphous aluminosilicate mineral is preferably a kaoline mineral made to be amorphous by heating. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
