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Performance Evaluation Of Hybrid Fiber Reinforced Concrete Matrix

In a Hybrid Fiber Reinforced Concrete (HFRC), two or more different types of fibers are rationally combined to produce a cementitious composite that derives benefits from each of the individual fibers and exhibits a synergistic response. The main aim of the present experimental investigation was to use different volume fractions of Recron 3S fibers (polyester fibers) and continuously crimped steel fibers to produce HFRC and thus to evaluate its performance under compression, tension, flexure, shear and impact types of loading. Based on I.S. Code method of mix design, proportion of different ingredients was obtained to get M20 grade concrete. Samples were prepared with and without fly ash and by varying the volume fraction of fibers from 0 to 1%. Total 12 different types of HFRC matrices were considered for performance evaluation. The improvement in mechanical properties of a matrix having volume fraction hybridization of 0.3% Recron and 0.7% of steel fibers was found to be the best.