Abstract— The preservation and sustainability of life on our planet are seriously threatened by environmental issues brought on by plastic pollution and excessive quarrying for natural aggregates; as a result, a workable substitute for natural aggregates would advance material sustainability. This work investigated the use of recycled plastic coated with sand as partial replacement for natural coarse aggregates in concrete production. Concrete of grade 25 was investigated in this study. Five concrete mixes involved the partial replacement of natural coarse aggregates with recycled plastic aggregate (RPA) at the ratios of 0%, 5%, 10%, 15% and 20%. Concrete samples were then subjected to Compressive strength test, Flexural strength test and Split tensile strength test according to BS EN 12390. Results indicated that the performance of plastic aggregate was optimized at 20% partial replacement of natural aggregates with crushed plastic coarse aggregates where compressive and flexural strengths were 25.4N/mm2 and 7.3 N/mm2 respectively
Key words: Recycled plastic aggregate, concrete, aggregates, plastics
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