Use of Bio-enzymes and Natural Adhesives for Improvement of Geotechnical Properties of Black Cotton Soils

Black cotton soil, are expansive in nature, posing challenges for construction activities. Structures resting on these soils may crack and sink as a result of the soils' seasonal expansion during the monsoon and contraction during the summer. Special techniques such as soil stabilization, the use of deep foundations, and proper drainage systems are employed to mitigate the effects of swelling and prevent damage to buildings. In the present study, the extensive literature survey is conducted on different type of stabilizers such as various fibres, agricultural by-products, industrial by-products, chemical stabilizers, natural adhesives, and bio-enzymes used for improvement in geotechnical properties of black cotton soils. The natural adhesives Xanthan gum and bio-enzyme Terrazyme are used for this research study to enhance the black cotton soil collected in Kolhapur, Maharashtra, India. Both compounds were found to increase the qualities of black cotton soil, including plasticity, California bearing ratio, and unconfined compression strength. When compared to Terrazyme, Xanthan gum increases unconfined strength at a dose of 1% of soil mass. Terrazyme dose of 1.5 ml per 100 ml of water enhanced the California bearing ratio by 76.32%. Terrazyme and Xanthan gum are effective in increasing soil adhesion and forming dense masses, but Xanthan gum may pose challenges in the field due to its potential for difficulties in mixing.