STRUCTURAL BEHAVIOR OF HYBRID FIBER REINFORCED CONCRETE BEAM USING STEEL AND POLYVINYL ALCOHOL FIBER

Abstract

           Fiber reinforcement is commonly used to provide toughness and ductility to cementitious matrix which is brittle in nature. Reinforcement of concrete with a single type of fiber may improve the desired properties of a composites to a limited level, whereas hybrid fiber is a combination of two or more types of fibers which are rationally combined to produce a composite that derives high benefits and exhibits a synergetic response. The aim of this investigation is to determine the addition of optimum dosage level of fibre in concrete. By having the optimum dosage level, beams are casted to determine the structural behaviour of HFRC. The hybrid fibers used are Steel Fiber (Crimped) in shape and PolyVinyl Alcohol Fiber. HFRC specimens are casted for 1% volume fraction. As a result of this investigation the structural performance such as ductility factor, stiffness and energy absorption capacity has significant improvement compared to conventional concrete