An Experimental Investigation on Partial Replacement of Fine Aggregate by Waste Plastic and Coarse Aggregate by C&D Waste in Concrete

This project is experimental research on the partial substitution of fine aggregate by plastic waste and coarse aggregate by construction and demolition (C&D) waste in concrete. The motivation is to seek alternative, sustainable ways of using conventional aggregates and minimize the environmental footprint of plastic and C&D waste. In this study, various concrete mixes were cast by partiallysubstituting fine aggregates by shredded plastic waste and partially substituting coarse aggregates by C&D waste. Standardized tests were performed to assess the workability, compressive strength, and overall performance of the modified concrete. The findings confirmed that the presence of plastic waste and C&D materials significantly affected the workability and mechanical properties of the concrete. Although, compressive strength reduced with higher levels ofreplacement, some combinations were still above the required level of strength for structural purposes. This experimentillustrates the possibility of utilizing recycled waste and non biodegradable materials in concrete to ensure sustainability,along with efficient waste management for the constructionsector. Key words: Cement, Coarse Aggregate, Construction andDemolition (C&D) Waste, Fine Aggregate, Plastic Waste