Experimental Investigation on the Strength Properties of M25 Grade Concrete with Partial Replacement of Coarse Aggregate by E-Waste

Abstract

Electronic waste (E-waste) is an emerging issue posing serious pollution problems to the human and the environment, the disposal of which is becoming a challenging problem. For solving the disposal of large amount of E-waste material, reuse of E-waste in concrete industry is considered as one of the most feasible application. Due to increase in cost of normal coarse aggregate it has forced the civil engineers to find out suitable alternatives to it. E-waste may be used as one such alternative for coarse aggregate. In this work, effect of partial replacement of coarse aggregate by E-waste in concrete was studied. The type of E-waste selected was high impact polystyrene which is non-degradable and also impermeable. The replacement of coarse aggregate by E-waste was in the range of 10%, 15%, and 20%. The mix design for M25 grade concrete was done by IS code method. The compressive strength, split tensile strength and flexural strength of concrete were found for various percentage replacements of E-waste in concrete and compared with that of the control mix. The optimum dosage of E-waste to be added in M25 grade of concrete was determined. In the above investigation, it was found that use of E-waste as partial replacement for aggregates results in the formation of concrete which has lesser weight than that of conventional concrete. This study also ensures that reusing E-waste as above gives a good approach to reduce cost of materials and also provide a solution for disposal of solid waste problems posed by E-waste.