An Experimental Study on Properties of Hybrid Fiber Reinforced Concrete

Hybrid Fiber Reinforced Concrete (Hy-FRC) is formed from a combination of two or more different types of fibres, which differ in material properties, remain bonded together when added in concrete and retain their identities and properties. The combining of fibers, often called hybridization, is investigated for a M20 grade concrete at a fraction of 0.5% in this paper. Control and three different hybrid fiber ratios were cast using different fiber proportions of polypropylene and coir fibers at the ratio of 70 % and 30 %. Compressive strength, split tensile strength and flexural strength test were performed and results were analyzed to associate with above fiber combinations. Based on experimental studies, the paper identifies fiber combinations that demonstrate maximum compressive, split tensile and flexural strength of concrete. To evaluate the strength parameters different tests are conducted and results are tabulated. Hybrid ratio 0.5 % gives maximum results in all the strength parameters compare to other different hybrid ratios, that the strength was observed as increased up to 45 % while adding 0.5 % hybrid fibers.