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Flexural Behavior of Hybrid Fiber Reinforced Concrete Beams

H S Jadhav and M D Koli
Civil Engineering Department, Rajarambapu Institute of Technology, Islampur, Maharashtra, India

Abstract—In this paper flexural behavior of hybrid fiber reinforced concrete beams is investigated. Combination of steel and polypropylene fibers was used as hybrid fibers. In hybridization, steel fibers of aspect ratio 30 and 50 were used and aspect ratio of polypropylene fibers was kept constant. The reinforced concrete beams of M-25 grade concrete were casted as per IS 10262:2009. The hybrid fibers of various proportions such as 0%, 0.25%, 0.5%, 0.75%, 1% and 1.25% by volume of concrete were used. Three specimens of 0% and six specimens of each remaining percentage (0.25%-1.25%) were casted. All the beams were tested under two point loading under UTM. The results were evaluated with respect to first crack load, ultimate load, ultimate defection, flexural strength, ultimate moment and flexural rigidity. The test result shows that use of hybrid fiber improves the flexural performance of the reinforced concrete beams. 

Index Terms—hybrid fibers, polypropylene fibers, steel fibers, flexural strength

Cite: H S Jadhav and M D Koli, "Flexural Behavior of Hybrid Fiber Reinforced Concrete Beams," International Journal of Structural and Civil Engineering Research, Vol. 2, No. 3, pp. 210-218, August 2013.