STABILIZATION OF LATERITIC SOIL WITH SUGARCANE BAGGASSE ASH FOR SUBGRADE CONSTRUCTION

This research explores the impact of sugarcane bagasse ash (SCBA), an agricultural waste product, on the engineering properties of lateritic soils, commonly used as construction materials in tropical regions. Bagasse ash, derived from the combustion of sugarcane byproducts, is gaining attention as a cost-effective and sustainable soil stabilizing agent due to its pozzolanic properties. The research investigates the effects of incorporating varying percentages of SCBA (0%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, and 16%) on the geotechnical characteristics of lateritic soils. Laboratory experiments were conducted to evaluate changes in key properties such as unconfined compressive strength (UCS), California bearing ratio (CBR), optimum moisture content (OMC), and maximum dry density (MDD), using standard procedures. The results revealed that the inclusion of SCBA enhanced the mechanical properties of the lateritic soils, with significant improvements in strength and durability at specific SCBA percentages. Notably, an optimum SCBA content was identified, beyond which further additions led to diminishing returns in soil performance. These findings underscore the potential of SCBA as a sustainable solution for improving soil stability and reducing reliance on traditional stabilizers like cement or lime. This research contributes to the growing body of knowledge on the utilization of agricultural waste materials in geotechnical engineering. It provides valuable insights into eco-friendly construction practices and promotes the adoption of locally available, sustainable materials for infrastructure development. The study's implications are particularly relevant for regions where lateritic soils predominate and where sustainable practices are essential for environmental preservation and cost efficiency in construction.