Indian Journal of Science and Technology

Abstract

Objectives: Waste materials can be used as geotechnical admixtures to improve geotechnical properties of black cotton soils as well as curb environmental degradation. Methods: The aim of this paper is to provide a clear understanding of the effect of geotechnical admixtures on the properties of expansive soils through selective reference to some of the literature. Experimental observations such as maximum dry density, optimum moisture content, California bearing ratio and unconfined compressive strength are reviewed. A comparative study is based on the proposed optimum combinations of admixtures and the geotechnical properties of expansive soil. Findings: Addition of geotechnical admixtures alters the physical and compaction characteristics of cohesive soils. Through thorough comparative studies of the existing researches it can be inferred that the combinations of admixtures and expansive soil improve the CBR value, UCS and decrease swelling index of soft soils to an acceptable range and aid in achieving economic design of pavement. Applications: • Stabilization of black cotton soil. • Optimum use of admixtures to enhance the geotechnical properties of black cotton soil. • Construction of pavements over black cotton soil. • Slope stability of embankment construction over black cotton soil.

Keywords: Admixtures, Black Cotton Soil, California Bearing Ratio, Unconfined Compressive Strength