| 摘要 |
PURPOSE: Provided is a method for making a slag board which has excellent raw material retention ratio, stable dimension deformation ratio and excellent properties after curing, without using asbestos as a reinforcing fiber at high productivity. CONSTITUTION: The method for making a slag board having no asbestos comprises the steps of: kneading raw material slurry containing slag and a fibrous inorganic material having a surface area of 320 m¬3/g or more and the length change factor after drying and absorption of less than 0.0015 in a pulper; and forming the kneaded mixture in the stage of paper making. Particularly, the raw material slurry comprises 40 parts by weight or less of the slag, 10-18 parts by weight of cement, 4-8 parts by weight of calcium sulfate hemihydrate, 3-11 parts by weight of pulp, 2-5 parts by weight of calcium hydroxide, 3-10 parts by weight of silica fume, 3-10 parts by weight of bentonite, and 3-10 parts by weight of diatomaceous earth.
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