| 摘要 |
PROBLEM TO BE SOLVED: To provide mixed cement having high fire resistance and strength. SOLUTION: The mixed cement is prepared by mixing cement and powder of asbestos with each other in a prescribed ratio. The prescribed ratio is controlled e.g. to 30-35 wt.% and the diameter of the powder of the asbestos is controlled for example, to 5-1,000μm. COPYRIGHT: (C)2005,JPO&NCIPI |
