Experimental study on electrical resistivity of soil-cement

Recently in China,soil-cement has been widely used to improve the soft ground in the highway construction engineering.In the literature studies were mainly on the mechanical performance of the soil-cement,while its electrical resistivity were not well addressed.The electrical resistivity of the remolded soil-cement and the in-situ soil-cement column were investigated.It was shown that the electrical resistivity of the soil-cement increased with the increase of the cement-mixing ratio and curing time,and decreased with the increase of the water content,degree of saturation and water-cement ratio.A simple equation was proposed to predict the electrical resistivity of soil-cement under the condition of the specified curing time and water-cement ratio.It was found that the electrical resistivity had a good relationship with the unconfined compression strength and blow count of SPT.It was expected that the electrical resistivity method could be widely used for checking/controlling the quality of soil-cement in practice.