Executive Summary : | soil stabilization is a common treatment method for improving problematic soils like expansive clays. standard admixtures like lime and cement can reduce the swell-shrink characteristics of expansive clay, but their impact on sustainable geotechnics is a major concern. To overcome these adverse effects, bio products are introduced into the soil, which has a promising future in sustainable geotechnics. This project focuses on using biopolymers, an eco-friendly material derived from plants, animals, and microorganisms, due to their recyclability and biodegradability characteristics. Research has shown that biopolymers, such as Xanthan gum and Guar gum, improve soil strength when added in different proportions. Biopolymers require less amount to achieve comparable strength than traditional materials. This makes them the best option for stabilizing both cohesive and cohesionless soil with higher strength. This project aims to use common biopolymers as a green adhesive to control the swell-shrink behavior of expansive soils through shallow mixing and deep injecting techniques. The shallow mixing involves adding various mix proportions of biopolymer treated with expansive soils, while the deep injection techniques vary the length to diameter ratio and column size to achieve optimal spacing and column size. The research aims to contribute to the minimization of traditional stabilizers like cement and lime, promote the use of low carbon footprint materials, and encourage sustainability in the environmental aspects of geotechnics. |