Evaluation of strength properties of glass fiber reinforced concrete
Keywords:Fiber reinforced concrete, Glass Fiber, Compressive strength, Tensile strength, Brittleness
Concrete is the most prominent construction material that is used globally. As concrete is a fragile material, it is attenuated in tension. The concrete incorporated with non-metallic fiber (Glass Fiber) is a new addition in the area of concrete technology. The entanglement of glass fibers in concrete not only ameliorates its compressive strength but also improves tensile strength significantly. In this research, 10 different mixes with total 80 samples including concrete compressive and tensile strength were embellished with disparate percentages of glass fibers viz. 0.1%, 0.2% and 0.3% of which distinctive fiber length of 15 mm, 20 mm and 25 mm were added by volume of concrete. Experimental outcome illustrated that adding the higher percentage of fiber (>0.2%) in the mixing, cohesiveness of the concrete matrix gets affected due to balling of fiber. The balling of fibers produces honeycombed concrete that also affects workability of the mixture and slightly degrade the concrete compressive and tensile strength. Furthermore, this study elucidated that glass fiber reinforced concrete (GFRC) abated the friableness of concrete contrasted to plain concrete. Incorporation of 0.2% glass fibers with 20 mm length has augmented the compressive and tensile strength by 40.73% and 90.3% respectively, as well as reduced the brittleness by 45.8% when was compared to plain concrete. Therefore, the results are of potential importance in developing wide range of GFRC by using optimum content (0.2%) and length (20 mm) of fiber to achieve better performances in response to strength and brittleness.