Experimental study on the electrical resistivity Of cemented soil contaminated by vitriol

Abstract

Take the cemented soil mixed with the soil polluted by vitriol as object, the relationships between of their electrical resistivity and age, Vitriol content, unconfined compression strength have been studied quantitatively. Then combined with microscopic photos, the change mechanism of electrical resistivity were analyzed. Results show: the electrical resistivity are increased with the increase of age under every vitriol content; The electrical resistivity are first increased then decreased with the increase of vitriol content under every age, and the electrical resistivity reach a maximum when the vitriol content equals 9g/kg; the unconfined compression strength of cemented soil has a linear correlation with the increase of electrical resistivity. The change of electrical resistivity is because of conductive pore structure and the number of ions. The electrical resistivity of cemented soil is higher, the integral structure conductivity is weaker, the link between soil particles is more closely, the porosity ratio is smaller, the pore connectivity is poorer, the unconfined compression strength of cemented soil is higher.