| abstract |
[PROBLEMS] In consideration of the environment, at the same time to suppress the cement content is from 0 to 11% by weight, using the waste, by-products in large quantities, there is provided a mineral plate suitable for building plates. [ Measures ] 30 to 53 mass% of blast furnace slag, 2 to 5 mass% of gypsum having an average particle diameter of 200 to 2000 µm, 5 to 11 mass% of alkali material, 5 to 15 mass% of reinforcing fiber, inorganic admixture And 31-50 mass%, and the blast furnace slag: gypsum: alkali material mass ratio dehydrates the slurry of 1: 0.05-0.15: 0.15-0.35, and is a hardened body of the mat formed. The blast furnace slag preferably has a specific surface area of 3000 to 5000. |