PURPOSE: To obtain the cured body excellent in forming efficiency by mixing calcium aluminate powder, gluconic acid, etc., a specified inorg. compd. and water, kneading the mixture, forming the kneaded product and endothermically curing the formed product.
CONSTITUTION: A composition consisting essetnailly of calcium aluminate powder, gluconic acid, etc., an inorg. compd. selected from inorg. salts, calcium oxide and calcium hydroxide is kneaded and then formed, and the formed product is cured to obtain the desired cured body. The calcium aluminate powder is the compd. of CaO, Al2O3 and other halogen compds. and expressed by C3A, C12A7, CA, CA2, C11A7CaF2, C3A3CaF2, etc., where C is CaO and A is Al2O3. The gluconic acid, etc., are gluconic acid or its salt, and the K and Na salts, etc., are preferably used. The strength developing property of the cured body is improved especially by using ≥2 kinds of inorg. compds., and the setting time at the ordinary temp. of 15 to 30°C can be prolonged.
JPS565366A | 1981-01-20 |