Influence of Eggshell Powder Waste as Added Material in Mortar for a Sustainable Environment

Abstract

Indonesia is a country where the majority of the population consumes eggs as an affordable source of animal protein. According to the Central Statistics Agency, the annual amount of eggshell waste reaches 667.000 tons in Indonesia. This large amount of eggshell waste pollutes the environment, causes unpleasant odors, and can attract parasites and diseases. An eggshell contains 94% (CaCO₃), 1% of Ca₃(PO₄)₂, 1% (MgCO₃), and 4% organic matter. The high CaCO₃ content gives eggshells the potential to increase the hydration process and provide early strength and compressive strength. Previous research shows that using eggshell powder as a cement substitute in more than 15% of cement can reduce the compressive strength. In this research, the maximum variation tested was 15%. The purpose of this research Eggshell powder would be used as an added material Mortar to know compressive strength, absorption, and Density (unit weight). The experiment's method was developed by adding eggshell powder  0%, 5%, 10%, and 15%  to the weight of cement. SNI 03-6825-2002 was used as a standard for compositing mortar mixture. The Results showed that the optimal compressive strength was 30,77 MPa with 2,5% of eggshell powder. The addition of Eggshell powder decreased mortar absorption and density.

Keywords: Absorption Eggshell powder, compressive strength, density, mortar