Patent ID: 6139620
Filing Date: 2000-10-31
Classification: C04B,Y02P,Y02W

Abstract:
A method of manufacturing a calcium silicate board comprising:a step of forming a material slurry into a prescribed shape of a molded body, said material slurry comprising 5 to 30 wt % of calcium silicate hydrate slurry as a solid component, 17 to 50 wt % of calcareous material, 13 to 45 wt % of silica containing material, 2 to 8 wt % of fiber material and 5 to 40 wt % of inorganic fillers;wherein said calcium silicate hydrate slurry consists essentially of an amorphous material and is obtained by a hydrothermal reaction of a slurry, comprising said calcareous material and a crystalline silica containing material of which a Ca/(Si+Al) molar ratio is 0.3 to 0.8, added with water under conditions that a reaction rate of said crystalline silica containing material is 40 to 80% at a saturated vapor pressure, and said calcium silicate hydrate slurry has a sedimentation volume of 5 to 14 ml/g, anda step of hydrothermally reacting the obtained molded body in a pressure container.