| 摘要 |
PROBLEM TO BE SOLVED: To provide a quick hardening admixture which is used for imparting a quick-hardening property to cement-based compositions such as cement-based paste, mortar or concrete, and can easily secure a long pot life without causing the deterioration of strength developability as well as early age strength and without substantially disturbing the quick-hardening property even when other admixture components are not used in combination. SOLUTION: This quick hardening admixture contains anhydrous gypsum whose surface is coated with gypsum dihydrate and calcium aluminate as effective components. COPYRIGHT: (C)2007,JPO&INPIT |
