| abstract |
(57) [Summary] [Purpose] To provide a cement which is fast-curing and retains fluidity for a time sufficient for normal molding without being set, by using a combination of general inexpensive materials. [Composition] Hemihydrate gypsum, alumina cement, Portland cement, blast furnace quench slag, water reducing agent and set retarder. The weight ratio of hemihydrate gypsum and alumina cement is 10 0:10 to 100: 125, the weight ratio of Portland cement and blast furnace quench slag is 100: 110 to 100: 5. 5. The ratio of the total amount of Portland cement and blast furnace quenching slag to the total amount of hemihydrate gypsum and alumina cement is 1 It is set to 00: 400 to 100: 180. |