MODIFIATION OF LATERITIC SOIL WITH RICE STRAW ASH FOR SUSTAINABLE ROAD CONSTRUCTION
Abstract
This study investigates the potential of Rice Straw Ash (RSA) as eco-friendly stabilizing
agents to improve the properties of lateritic soil for road construction. Lateritic soil, widely
available in tropical regions, often lacks the necessary strength and durability for road
subgrades, requiring stabilization to meet construction standards. RSA, both by-products of
agricultural processes, offer a sustainable alternative to traditional stabilizers like cement due
to their pozzolanic properties and local availability.
The research follows a systematic approach involving sample collection, preparation, and a
series of laboratory tests to evaluate the physical, mechanical, and microstructural properties
of lateritic soil treated with varying proportions of RSA. Key tests include particle size
analysis, Atterberg limits, unconfined compressive strength (UCS), and California Bearing
Ratio (CBR) amongst others. Results indicate significant improvements in the soil's strength,
cohesion, and durability, with optimal stabilizer proportions identified for enhancing road
performance.
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