Durability Studies on Expansive Soils Stabili...

Durability Studies on Expansive Soils Stabilized with Cement using Bagasse Ash as Additive

Author Name : Samatha Chowdary Ponduri, G. Sandhya Rani, G. Jahnavi, A. Sowmya

DOI: https://doi.org/10.56025/IJARESM.2024.120924315

ABSTRACT The evolving technology in road construction is increasingly addressing the challenges posed by changing vehicular patterns, materials, and subgrade conditions, particularly with expansive soils. These soils undergo significant volume changes due to their physicochemical properties, leading to damaging cycles of swelling and shrinkage that can compromise lightly loaded structures such as pavements and residential buildings. To mitigate these issues, chemical stabilization methods, particularly the use of cement, have gained prominence. By incorporating 2% to 6% cement into expansive soils, it’s possible to enhance the material's density and strength, transforming it into a semirigid slab that reduces liquid limits, plasticity, and potential volume changes while increasing shrinkage limits and shear strength. This approach not only preserves existing materials but also reduces the need for expensive excavation and replacement. Moreover, the integration of industrial waste materials in road construction is a growing trend. This practice is not only economically beneficial but also environmentally friendly, addressing pollution and disposal challenges associated with industrial byproducts. India, with its vast industrial network, produces millions of metric tons of waste that can be repurposed for highway construction, further enhancing sustainability in the sector. Recent studies have explored the effectiveness of using waste materials for soil stabilization, particularly under fluctuating moisture conditions. In this context, the current paper investigates a mixture of soil, cement, and bagasse (8% cement and 8% bagasse by weight of soil) to analyze its performance under wetting-drying cycles and its impact on swell pressure. The findings aim to provide insights into reducing volume changes in expansive soils, enhancing the longevity and durability of road infrastructure.