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Plastics are astounding discovery of man and has become an indispensable and inseparable part of a common man‟s life. The disposing off of several existing forms of plastics in nature has always been a key matter of concern to man. Polyethylene terephthalate, commonly known as PET is commonly and widely used for developing plastic bottles which in turn are consumed for packaging of different kinds of beverage products packaging. In spite of its various uses, there are issues of its biodegradability which poses a strain to environment. Plastics are one of such products which are littering the oceans and environment. Hence there is a dreadful requirement of some solution to effectively solve this problem of disposal to reduce the environmental strain. The researchers are trying to incorporate one waste product or the other into concrete so that it can help in a dual way- decreasing the strain on environment and the effective utilization by enhancement of various mechanical properties of concrete. Research studies have made it quite clear that the PET waste has the capability to enhance various parameters of concrete which is a far better option than sending it to landfill. The research studies on PET fibers have also confirmed one more thing that these can be more effectively utilized by modifying the shape of fibers and their bonding properties. The present study is focused on reviewing the use of various aspect ratios(length to breadth ratio) and shapes of plastic fibers in concrete