Patent ID: 8137453

Claim:
A fiber reinforced concrete, comprising: fiber included in a dispersed manner in a cement matrix; cement; first pozzolanic reactant particles; second pozzolanic reactant particles composed of any one of fly ash, blast furnace slag and volcanic ash, the second pozzolanic reactant particles having a reactivity lower than the first pozzolanic reactant particles, and the second pozzolanic reactant particles having a median diameter D 50 of 2 μm to 11 μm; first aggregate particles composed of any one of hard fine sand, sea sand, river sand and crushed sand composed of andesite, volcanic rock, and quartzite, the first aggregate particles having a maximum particle diameter smaller than or equal to 2.5 mm, a mean particle diameter within a range of 0.4 mm to 0.8 mm and a fineness modulus within a range of 1.5 to 3.5; second aggregate particles composed of any one of quartz powder, fine sand, silica sand, amorphous quartz, opaline silica-containing powder, cristobalite powder and rock powder, the second aggregate particles having a maximum particle diameter smaller than or equal to 0.425 mm, a mean particle diameter within a range of 0.1 mm to 0.3 mm and a fineness modulus within a range of 0.4 to 0.8; at least one plasticizer; and water.