AN EXPERIMENTAL STUDY ON SOIL STABILIZATION BY USING CEMENT, FLY ASH AND NATURAL WASTE

Abstract

In a move toward greener construction methods, researchers have tested a soil stabilization technique using a blend of cement, fly ash, and rice husk—a natural agricultural by-product. The study focused on improving the strength and durability of weak subgrade soils commonly used in infrastructure projects. Soil samples were treated with varying proportions of each material, ranging from 0% to 20%, and subjected to standard tests such as the Proctor compaction test, California Bearing Ratio (CBR), and optimum moisture content analysis. The standout result came from a mix containing 15% cement, 15% fly ash, and 15% rice husk, which delivered the highest strength and load-bearing capacity compared to untreated soil. Beyond performance, the study highlights a key environmental benefit: the reuse of industrial and agricultural waste. Researchers say this cost-effective combination not only reduces reliance on cement but also promotes sustainable practices in civil engineering—offering a practical path to eco-friendly construction.