Fibre Reinforced Light Weight Aggregate (Natural Pumice Stone) Concrete

Abstract

Steel fibre reinforced concrete (S F R C) is a composite material developed to reduce the brittleness of concrete and dramatically increases its ductility. Steel fibre reinforced concrete (S F R C) is used extensively to line the tunnels and other underground structures, to increase the thickness of pavements, and to repair and strengthen various structures. Increasing utilization of lightweight materials in structural applications is making pumice stone a very popular raw material. More than the target means strength of M 20 concrete is achieved with 20 percent replacement of natural coarse aggregate by pumice aggregate and with 1.5 percent of fibber. Also with 40% pumice and with 0.5% of fibbers average target mean strength of M 20 concrete is achieved. The compressive strength of pumice concrete is seen to increase with the fiber content and reaches an optimum value at 1.5% of fiber content and afterwards it gets decreased for various contents of pumice. Index Terms— Cube Compressive Strength, Cylinder Split Tensile Strength, Impact Resistance of slabs, Light Weight Aggregate Concrete, Natural Pumice Stone, Steel fibre, Strain energy Stored in Beams. ——————————  ——————————