Performance of Hybrid Fiber Reinforced Concrete with Steel Fibers and Polypropylene Fibers

The geometrical size and modulus of fibers are the main factors influenced the mechanical performances of fiber reinforced concrete. The use of different type of fiber in a suitable combination may potentially improve the overall mechanical performances of concrete and result in performance synergy. This paper studied experimentally the synergic mechanical properties of hybrid fiber reinforced concrete (HyFRC) with different kinds and percents of steel fibers and polypropylene fiber, to find out the higher performance of mechanical properties of hybrid fiber reinforced concrete mixtures. Four groups of test specimens with macro and micro-fiber combination of steel fiber and polypropylene fiber were used to investigate the HyFRC's compressive strength, split tensile strength, bending strength and impact resisting performance.