Application of steel fiber concrete in water conservancy and hydropower project
Steel fiber reinforced concrete is a new kind of multiphase composite material, which is made up of short steel fiber reinforced by random distribution in ordinary concrete. The chaos to the distribution of steel fiber can be formed effectively hinder the propagation of concrete internal micro cracks and macro cracks, improve concrete tensile strength, bending strength, impact resistance and fatigue performance, has good ductility.The fiber volume of ordinary steel fiber reinforced concrete at the rate of 1% to 2%, compared with ordinary concrete, the tensile strength increased from 40% to 80%, the flexural strength increased by 60% - 120%, the shear strength increased by 50% to 100%, the compressive strength increased slightly, generally 0 to 25%, but the compressive toughness is greatly improved.
More solid, insoluble in water leaks, etc.
The modern water conservancy and hydropower project construction, gradually using the wet sprayed steel fiber reinforced concrete, small rebound rate (5%~10%), no rebound in steel fiber concrete), uniform quality, usually can reach the strength of 55MPA, special operations, can reach 100MPA; the less dust, safe operation; water cement ratio, water permeability low; do not need anti-corrosion treatment, can prevent electrolysis and accelerated corrosion. Good durability and crack resistance. It can prevent shrinkage and compactness.
