(283e) Fly Ash Utilization and Development of Low Density Red Clay Bricks

This paper reports an experimental work on fly ash utilization and development of low density red clay bricks. Bricks with different compositions of fly ash, red clay and organic matter were made and tested for bulk density, water absorption, porosity, shrinkage and crushing strength. The fly ash and red clay content used in bricks was up to 50 percent and 70 percent respectively. Organic matter was varied from 0 to 10 percent. Bricks made of 40 percent fly ash have shown good physical properties. The crushing strength of the brick increased with increase in fly ash content and the brick strength decreased with increase in clay content. The properties of bricks that are fired at 7000C, 8000C and 9000C were obtained. Higher firing temperatures offered greater shrinkage. The bricks developed in the present study possess crushing strength up to 16.4 MPa.