Patent ID: 7837788
Filing Date: 2010-11-23
Classification: C04B,Y02W,Y10S

Abstract:
1. A fiber reinforced cement composition comprising the following raw materials: not less than 25% by mass and not more than 45% by mass of a hydraulic inorganic material; not less than 50% by mass and not more than 65% by mass of a siliceous material; not less than 5% by mass and not more than 12% by mass of a woody reinforcement; not less than 1% by mass and not more than 7% by mass of mica; and not less than 0.25% by mass and not more than 1.5% by mass of polyvinyl alcohol resin, wherein the hydraulic inorganic material is a portland cement, the siliceous material is a mixture of burned ash of coal and/or rhyolite having an average particle size of not less than 15 μm and not more than 50 μm and burned ash of coal and/or rhyolite having an average particle size of not less than 1 μm and not more than 15 μm, and a woody reinforcement is needle-leaves-tree unbleached haft pulp and/or needle-leaves-tree bleached kraft pulp and used newspaper.