| 摘要 |
PROBLEM TO BE SOLVED: To provide a cement composition excellent in fluidity, which can obtain predetermined fluidity using a small amount of an admixture. SOLUTION: The amount of fine gypsum in a cement composition is reduced while ensuring a predetermined amount of gypsum therein. That is, the amount of all gypsum in the cement composition is 0.90-1.50 mass% in terms of SO<SB>3</SB>and the amount of fine gypsum of≤10μm is confined to≤0.70 mass% in terms of SO<SB>3</SB>. The amount of hemihydrate gypsum of≤10μm contained in the cement composition is confined to≤0.61 mass% in terms of SO<SB>3</SB>. COPYRIGHT: (C)2010,JPO&INPIT |
