The use of plastic bottles is on the rise, causing lots of new environmental issues. It is now extremely difficult to dispose of plastic waste without damaging the ecosystem. As good quality soil for embankments is limited, utilizing plastic bottles to enhance soil strength parameters is a cost-effective solution. This study explores the potential application of discarded plastic strips from plastic bottles for soil property enhancement. The black cotton soil is amended with about 0%, 5%, 6%, 7%, 8%, 9%, and 10% plastic strips. On black cotton soil that had been strengthened with plastic waste, direct shear and falling head water permeability tests were executed as part of the experiment. The test results under the circumstances are provided to evaluate the change in soil strength characteristics. In the aspects of shear strength, friction angle, and cohesiveness, it was determined that soil samples containing 5-9% plastic strips performed better than soil samples containing no plastic strips. The composition of discarded plastic bottle strips has a considerable influence on the development of soil strength. On the other hand, the inclusion of the plastic strip enhanced the permeability of black cotton-reinforced soil. In addition, this innovative approach may be utilized to successfully address socioeconomic issues, such as the recycling of waste materials.
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