| 摘要 |
A rapidly curable composition for cements which is satisfactory in initial gel strength and short-time gel strength and enables cement placing in, e.g., lands having many voids or a large amount of running water; a production process; and an application method. The rapidly curable composition for cements comprises calcium aluminate and an inorganic sulfuric acid salt, the amount of the inorganic sulfuric acid salt being preferably 50 to 200 parts by weight per 100 parts by weight of the calcium aluminate, and has a Blaine specific surface area of 7,500 cm2/g. The rapidly curable composition is preferably produced by mixing calcium aluminate having a Blaine specific surface area of 4,000 to 6,000 cm2/g with an inorganic sulfuric acid salt having a Blaine specific surface area of 3,000 to 6,000 cm2/g and pulverizing the mixture so that it comes to have a Blaine specific surface area of 7,500 cm2/g or higher.
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