| 摘要 |
PROBLEM TO BE SOLVED: To provide a cement admixture and a cement composition where an alkali-silica reaction in mortar and concrete can be effectively suppressed and where quick setting strength is not lost. SOLUTION: In the cement admixture containing a lithium-type zeolite and a quick setting agent, the lithium-type zeolite is EDI type, ABW type or a heat-treated material of them, the content of lithium in the lithium-type zeolite is 5% or more in terms of Li<SB>2</SB>O, the total content of Na<SB>2</SB>O and K<SB>2</SB>O is less than 0.5% and the content of the quick setting agent is 10-90 pts. and the content of the lithium-type zeolite is 10-90 pts. The cement composition contains cement and the cement admixture. COPYRIGHT: (C)2010,JPO&INPIT |
