FRACTIONAL CEMENTITIOUS USE OF CENOSPHERE IN CONCRETE

Global CO2 emissions are largely caused by the cement industry. The use of industrial by-products as supplemental cementitious materials (SCMs) to improve sustainability is currently the subject of extensive research. Cenospheres, which are lightweight, hollow alumino-silicate spheres made from coal fly ash, have the potential to partially replace cement because of their high silica content, low density, and pozzolanic activity. This study looks into the ideal amount of cenosphere replacement in concrete, creates a workable mix design, and analyzes the mechanical characteristics (compression, tension, and flexural strengths) of M20 and M40 grades of concrete partially replaced with cenospheres. The findings show that while excessive replacement lowers mechanical performance, optimal cenosphere replacement improves concrete strength and sustainability.