EXPERIMENTAL INVESTIGATION ON FLEXURAL BEHAVIOR OF HYBRID FIBER REINFORCED CONCRETE BEAM

The aim of this experimental investigation is to study the flexural behavior of Hybrid fiber reinforced concrete beams (HFRC). In this study, by adding the fibers in normal concrete adequate ductility of concrete is ensured and shrinkage crack is reduced. The behavior of RC beam structures strengthened by using hybrid fiber reinforced (HFRC) is analyzed. Grade of M30 as per IS 10262:2009 concrete beams are casted. The steel and Polypropylene (PP) fibers are used in different proportions with 0.5% of volume of concrete. The properties of the fresh concrete (workability) is obtained from the Slump test, Compaction factor Test and the hardened concrete were done by Compressive strength, Split tensile strength and Flexural strength by adding Super plasticizer CONPLAST SP 430 at 0.8% to the total volume. The hybrid fibers various proportions are 33:67, 50:50 and 67:33 for the volume fraction is 0.5% of volume of concrete were used in the concrete mixes. Totally six beams were casted including control beam specimen. The test results show the use of Hybrid Fiber reinforced concrete improves flexural behavior of the beams during loading conditions.