Experimental Study on Structural Behaviour of Fiber Reinforced Concrete Beam Using Hybrid Fibers

Abstract

This study investigates the effect of the addition of steel and glass fibers in concrete and thus evaluate its performance under compression, tension and flexural type of loading based on IS code method of mix design. Mix design is carried out for M20 and M25 grade of concrete. The samples were prepared by varying the percentage volume of fraction of steel and glass fibers w.r.t concrete. Steel fibers are used in the range of 0% to1.5% & glass fibers are used in the range of 0% to 0.3% by volume of concrete. The mentioned fraction is used in various combinations for concreting & to get the results of 7 days & 28 days of samples to decide the optimum mix. The three numbers of beams are casted as a conventional concreting and the 3 no of beams are casted with optimum hybrid mix of steel fiber and glass fibers. The casted beams are cured for 28 days then this beam tested for flexural strength. The cubes and cylinders are casted and tested for compression and tensile strength of M20 and M25 grade concrete with and without hybrid fiber mix respectively. Simply supported beam with two equal point load acting at top surface of beam will be tested, up to failure in the well-equipped heavy structural laboratory. The behaviour of beam studied in concern with crack and ultimate load.