Economics of Stabilizing Bentonite Soil with Lime-Gypsum

 

N. K. Ameta

Associate Professor, M. B. M. Engineering College, J. N. V. University, Jodhpur, Rajasthan, India

D.G.M. Purohit

Professor, M. B. M. Engineering College, J. N. V. University, Jodhpur, Rajasthan, India

A. S. Wayal

Research Scholar, M. B. M. Engineering College, J. N. V. University, Jodhpur, Rajasthan, India

Dangda Sandeep

P.G.Student, M. B. M. Engineering College, J. N. V. University, Jodhpur, Rajasthan, India

ABSTRACT

For solving problems of expansive soil it is necessary to stabilize it with any of additive substance such as lime, gypsum etc. After stabilization soil properties are altered such as bearing capacity, shear strength & stability of soil which are increased and the shrinkage, swelling are decreased. While planning for treatment of expansive soils with chemical additives, it must be kept in mind that how much addition of additive would be economical to get higher strength and to get higher reduction in plasticity. It is necessary to keep the cost of treatment as much as low without compromising with the strength. In present investigations locally available lime and gypsum of commercial grade has been used for studying the effect of lime and gypsum mixture on the plasticity and swelling properties of bentonite soil .It is found that addition of 2% lime and 4% bentonite is more economical in reducing plasticity and swelling as compared to the other mixes under study.

Keywords: Bentonite, Lime, Gypsum, swelling pressure, plasticity index, economics.

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