Patent ID: 7967907
Filing Date: 2011-06-28
Classification: C04B,Y02W

Abstract:
1. A fiber reinforced cement composition comprising the following raw materials: a hydraulic inorganic material; a siliceous material; a woody reinforcement; fiber reinforced cement particles having average particle size of 15-50 μm; mica; and polyvinyl alcohol resin, wherein the amount of the woody reinforcement is not less than 6% by mass and not more than 12% by mass; the woody reinforcement comprises needle-leaves-tree unbleached kraft pulp and/or needle-leaves-tree bleached kraft pulp and used newspaper, the amount of the used newspaper is not less than 1% by mass and not more than 20% by mass of the whole woody reinforcement consisting of the used newspaper and the needle-leaves-tree unbleached kraft pulp and/or the needle-leaves-tree bleached kraft pulp, the amount of the fiber reinforced cement particles is not less than 5% by mass and not more than 20% by mass, and the fiber reinforced cement particles are obtained by grinding and/or milling a fiber reinforced cement product which is obtained by curing raw materials comprising a hydraulic inorganic material, a siliceous material and a woody reinforcement in an autoclave.