A LABORATORY INVESTIGATION ON THE EFFICIENCY OF EXPANSIVE SOIL TREATED WITH VITRIFIED POLISH WASTE AND PHOSPHOGYPSUM AS SUBGRADE FOR FLEXIBLE PAVEMENTS

Abstract

Expansive soils are widely distributed approximately one-sixth of the total area of our country. Expansive soil causes great damage to infrastructure viz buildings and pavements. Mostly, these soils are covered with highly plastic and the expansive soil which is unfavorable for the construction purpose. The black cotton soils are basically prone to detrimental swell and shrinkage with variations in water content. The volume changes of soil are due to the presence of mineral montmorillonite, which shows large swelling and shrinkage. By testing the behavior of these clayey soils and embracing suitable measures to alter the properties of the subjected soil. The present study deals with the strength behavior of the expansive soil collected from Rellugadda nearby Amalapuram, East Godavari district, Andhra Pradesh, India. On adding Vitrified Polish Waste as an admixture and Phosphogypsum for enhancing the strength of the subjected soil. The laboratory tests have been carried out and results were reported in the present study.