Evaluating the Use of Eggshell Waste Ash in High Strength Concrete

Abstract

 Reducing the amount of cement in concrete production.  Positive impact in supporting natural resources' sustainability and ‎depletion of ozone layer by reducing the rate of CO2 emission.‎  Reducing the environment pollution by eggshell wastes.  Eggshell ash can be used as a partial replacement to cement in concrete.  ‎Eggshell ash can be used to enhance the durability of concrete. This study aims to determine the effect of incorporating eggshell waste as partial compensation from Portland cement material on high-strength concrete mixtures' performance. The properties studied are workability, compressive and flexural strengths, water absorption, dry density, and thermal conductivity. In the same trend, the environmental impact of the replacement mentioned above is evaluated. Four different weight percentages (0%,5%,10%,15%, and 20%) of the cement were replaced with eggshells ash. The results indicate that the incorporation of eggshell powder improves the compressive strength and flexural strength by about 14.7% and 6.5%, respectively, at 28days age over control concrete mixes at 15% replacement. The optimum replacement ratio was found to be 15% based on the strength. Furthermore, the results showed a reduction in water absorption and thermal conductivity as 15% of eggshell ash was used as a replacement by cement weight with 10.7% and 10.65 respectively, besides the reduction in the amount of cement used in the mixture. These results are positively reflected in supporting natural resources' sustainability and depleting the ozone layer by reducing the emitted gases. A R T I C L E I N F O Handling editor: Wasan I. Khalil