| 摘要 |
PROBLEM TO BE SOLVED: To provide a quick hardening cement kneaded material which ensures high initial strength, and provide a spray material. SOLUTION: The spray material obtained by adding an ettringite based quick setting admixture into a cement kneaded material containing water, cement and gypsum, contains gypsum dihydrate, gypsum hemi-hydrate and/or III type gypsum anhydride. COPYRIGHT: (C)2007,JPO&INPIT
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