Journal Article: Strength and Index Properties of Phosphogypsum Stabilized Expansive Soil

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Here is one more of my papers for the research collection.

Citation: James, J., Lakshmi, S.V., and Pandian, P.K., (2014), "Strength and Index Properties of Phosphogypsum Stabilized Expansive Soil", International Journal of Applied Environmental Sciences, Vol. 9, No. 5, pp. 2721-2731

Strength and Index Properties of Phosphogypsum Stabilized Expansive Soil   

Jijo James1, S. Vidhya Lakshmi2 and P. Kasinatha Pandian3  

1Asst. Professor, Department of Civil Engineering, Tagore Engineering College, Chennai – 127 2Associate Professor, Department of Civil Engineering, Tagore Engineering College, Chennai – 127 3Professor, Department of Civil Engineering, Tagore Engineering College, Chennai – 127   

Abstract

Expansive soils are the soils which swell significantly when they come in contact with water and shrink when there is removal of water from the soil. There are several methods available to mitigate the effects of swell-shrink nature of expansive soils. One particular method to control the volume changes of expansive soil is to stabilize it with admixtures that prevent it from volume changes or adequately modify the volume change characteristics of expansive soils. A lot of waste materials have been utilised in the stabilization of expansive soils. Phosphogypsum (PG) is one such waste material that has come to prominence in the recent years. PG is a waste by-product of fertilizer industry, especially phosphoric acid production. The worldwide generation of PG is estimated to be in the order of 100–280 million tonnes per year. In this study, the effectiveness of PG in stabilizing an expansive soil has been investigated. Test results reveal that 40% PG is optimal in enhancing the index properties as well as the strength of the expansive soil.

Keywords – Phosphogypsum, expansive soil, soil stabilization, waste materials

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