Green Synthesis of Calcium Oxide Nanoparticles from Pigeon Eggshells for Cement Composites

Solid waste management is one of the challenging issues faced by developing countries. India ranks 3rd in the production of eggs, generating about 3.8 billion kilograms annually. This growth in production at a larger rate is mainly due to the increase in domestic consumption. This could lead to a larger generation of solid waste. To overcome these issues, eggshells could be effectively incorporated into concrete production as cementitious blends. This paper investigates the suitability of pulverized eggshell powder having antibacterial activity, as a partial substitute for cement, and it enhances properties. The material characterization techniques like Scanning Electron Microscope (SEM) X-Ray Diffraction (XRD) were used to investigate the feasibility of using eggshell powder. Then the cement was partially replaced by pulverized eggshell at 5%- 20% by its weight. The fresh property was assessed using the flow table test, while the hardened property was determined using the compressive strength of the cement mortar for up to 30 days. From the test results, 10% pulverized eggshell powder when utilized in mortar gives optimum compressive strength. The microstructural investigations proved to be evident for pulverized eggshells when replaced at 10% delivered good strength and make smart cement.

Smart Cement, Compressive strength, Solid waste

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