| 摘要 |
PROBLEM TO BE SOLVED: To obtain an expansive material compsn. less liable to cause a pop-out and a partial abnormal expansion after application, ensuring a sufficient expansion rate and widely applicable to earthquake-proof reinforcement work, repair work and various expanded concretes such as watertight concrete, and to obtain an expansive cement compsn. using the expansive material compsn. SOLUTION: The expansive material compsn. contains an expansive material and 1-15 pts.wt. calcium hydroxide based on 100 pts.wt., in total, of the expansive material and calcium hydroxide. The expansive material contains hauynite, free lime and free gypsum. The expansive cement compsn. contains the expansive material compsn., cement and aggregate. |
