Utilization of Eggshell Powder as a Partial Substitute for Cement in Concrete: An Experimental Study

Abstract

The construction industry continues to seek sustainable materials due to environmental concerns linked to cement production. This study investigates the application of eggshell powder (ESP), an abundant agricultural waste composed mainly of calcium carbonate, as a partial replacement for Ordinary Portland Cement (OPC) in concrete. Concrete mixtures of grade M20 were produced by replacing cement with different proportions of ESP (0%, 5%, 10%, and 15% by weight). Tests for workability, compressive strength, and split tensile strength were conducted at curing ages of 7, 14, and 28 days. Findings demonstrate that incorporating ESP up to 15% enhances the mechanical performance of concrete, thereby promoting sustainable waste management while improving concrete properties.