Feasibility Study of Using Fly Ash Brick made from Reclaimed Sand Dust Waste

Abstract

This Paper summarizes a project where we prepared six mixes of fly ash bricks, each with 18 samples,
incorporating reclaimed sand dust waste, fly ash, sand, and cement. Mix 1 contained 0% waste, increasing by 10% in each subsequent mix, with a consistent 12% cement. The first three mixes had 38% sand and varying fly ash content (50%, 40%, 30%), while the next three had 0% sand and 58%, 48%, 38% fly ash, respectively. A 10% water content was added to all mixes. These proportions provided suitable strength to the fly ash bricks. We studied the history, significance, and problems of bricks, particularly fly ash bricks and reclaimed sand dust waste. Using past research, we evaluated feasibility and conducted compressive strength tests at 7, 14, and 28 days, achieving maximum strength. The water absorption capacity reached 27.82%, and the efflorescence test showed nil to slight salt deposition. Weight change was minimal, with slight variations in air-dry and oven-dry densities. In conclusion, this technique is practical and environmentally beneficial. We recommend further research to enhance its applicability and effectiveness.