Experimental Study on Hybrid Fiber Reinforced Concrete Deep Beams

International Journal of Civil Engineering
© 2017 by SSRG - IJCE Journal
Volume 4 Issue 2
Year of Publication : 2017
Authors : Prof. S.K.Kulkarni, Mr.Kekade G.A, Dr.S.A.Halkude
How to Cite?

Prof. S.K.Kulkarni, Mr.Kekade G.A, Dr.S.A.Halkude, "Experimental Study on Hybrid Fiber Reinforced Concrete Deep Beams," SSRG International Journal of Civil Engineering, vol. 4,  no. 2, pp. 33-39, 2017. Crossref, https://doi.org/10.14445/23488352/IJCE-V4I2P106


Improving and/or altering the characteristics of concrete have been focus of study by many researchers over past few decades. Combination of two or more types of fibers for getting high quality hybrid fiber reinforced concrete (HFRC) is a topic of interest amongst researchers. Use of small, discrete, randomly oriented steel fibers improves the strength and resistance against deformation characteristics of concrete members. Glass fibers improve shear strength, tensile strength, crack resistance, and energy absorption of concrete. This paper presents data obtained from experiments carried by using combination of these two fibers in predefined proportions in the concrete and its effect on strength characteristics of HFRC deep beams. The deep beams cast & cured were tested using 1000 kN capacity loading frame. The two-point loading is applied. During experiment, first crack load, deflection at first crack load and load at permissible deflection of deep beams are recorded. It is observed that, in comparison with conventional deep beams with shear span to depth ratio 0.5, there is improvement of 14% in first crack load and 11% in load at permissible deflection of HFRC deep beams cast with optimum mix containing 0.7% steel fiber and 0.3% glass fiber by volume of concrete. However workability of concrete with steel & glass fiber is observed to be lower than concrete with steel & Polypropylene fiber, whereas the strength acquired is higher by 13% in comparison with steel & PP fiber.


 Deep Beam, Steel fiber, Glass fiber, Hybrid fiber reinforced concrete, two points loading.


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