Experimental Study on Structural Behaviour of Concrete by Varying Percentage of Plastics as Fibbers

In this experiment waste (Polyethylene Terephthalate) PET fibers are added to concrete by the weight of cement. Used PET bottles are selected for this research because PET bottles are thrown by using only once and they are non-biodegradable in nature, which is causing major environmental problem all around the world. Main purpose of this investigation is to analyze the result of waste plastic bottles fibers as addition in concrete by the weight of cement. PET bottles are easily available for free of cost and that are collected. and they are cut in the form of fiber by removing top and bottom portion, and they are cut into size of 25 mm length and 0.7 mm width with a aspect ratio of 35 (AR 35).Study was conducted on M30 grade of concrete, PET fibers were added to the mix by the varying percentage of 0%, 0.5%, 1%, 1.5%, 2%, 2.5%, and 3% by weight of cement. The weight of plastic fibers was in grams. Total 126 specimens were prepared such as 42 cubes, prism and cylinders respectively. The specimens were tested for compression test, split tensile test and flexural test only after curing for 7 days and 28 days. Highest strength of concrete was noted at 1% addition of plastic fibers to the concrete, based on this result beams were casted and results were analyzed after 28 days of curing.