Optimization of Black Cotton Soil Stabilization Using Lime and Bamboo Fiber Mixture for Sustainable Road Subgrade Construction - A Review

Black cotton soil is highly expansive and poses serious challenges in civil engineering due to its swelling and shrinkage behavior. Stabilization of such soil is essential for improving its engineering properties and making it suitable for construction applications. This review paper presents a comprehensive analysis of previous research studies on stabilization of black cotton soil using lime, bamboo fiber, construction and demolition waste (CDW), and other sustainable materials. The study highlights the effectiveness of chemical stabilization using lime and mechanical reinforcement using fibers. Various experimental investigations indicate that lime reduces plasticity and improves strength, while fibers enhance ductility and resistance to cracking. The paper also identifies key research gaps related to combined stabilization techniques and optimization of material proportions. The review concludes that the combined use of lime and bamboo fiber offers a promising, cost-effective, and sustainable solution for improving subgrade performance.