V3I7P88

Development of Eco-Friendly Lightweight Concrete

Mane Kalpesh Vasantrao^*,  S. P. Sharma²  , L. S. Mahajan³

Abstract

This  study explores the development of sustainable concrete by partially replacing conventional cement with 10% fly ash cenosphere (FAC) and incorporating bacteria and calcium lactate as bio-based additives. The research evaluates the combined effects of these materials on the density and mechanical properties of concrete. Experimental results show that 10% FAC reduces concrete density by 4.62% after 28 days, contributing to the production of lightweight concrete. Although FAC alone decreases compressive, flexural, and tensile strengths, the addition of calcium lactate (0.015 mol/L) and bacteria significantly enhances these properties. The highest improvement in compressive strength (15%) and tensile strength (11%) is achieved with bacterial incorporation, while calcium lactate increases compressive, flexural, and tensile. The findings demonstrate that the combined use of FAC, bacteria, and calcium lactate effectively improves concrete performance, offering an environmentally friendly approach for producing lightweight, durable, and high-performance concrete for sustainable construction applications.

Keywords:

Concrete, Compressive strength, Strength, RCA