Experimental investigation for flexural behavior of RC beam containing glass fiber

Concrete fails in a brittle manner, failure of Reinforced Concrete (RC) beams are brittle and suddenly occurs. These shortcomings are generally overcome by using several technics. One of them was the inclusion of fibers into the concrete such as steel, glass, basalt, carbon etc. By using Glass Fiber (GF) into the concrete reduces reinforcement congestion. This thesis presents the effect of GF and Hybrid Fiber (HF) on the compressive, tensile, flexural strength and weight of concrete M-30 grade. In this investigation, ten different RC beams were cast and tested. All beams were tested over an effective span of 1300 mm up to the failure under 4-point flexural test loading. The beams were designed as a balance-section. All beams are the identical size of "1500 x 150 x 200 mm" and divided into three groups, Group A consist of three beams strengthened with different volumetric ratios (0.5, 1.0, and 1.5 %) of GF. Group B consists of three beams (0.25-0.75, 0.5-0.5, and 0.75-0.25 %) of glass and steel fiber and Group C consists of three beams (0.25-0.75, 0.5-0.5, and 0.75-0.25 %) of glass and basalt fiber. For each mix cast 3-cubes by dimensions "100 x 100 x 100 mm" and cylinders "Ø100 x 200mm" to obtain the compressive and tensile strength of samples. Addition of GF increase the compressive and tensile strength and decrease the weight of concrete.