Experiment Study on Resistivity Characteristics of Landfill Leachate Contaminated Loess in Uniaxial Compression Process

In order to investigate the relationship between the resistivity and compression coefficient of contaminated loess at different water contents and landfill leachate concentrations, the loess samples were pre-contaminated by artificially leachate. Then laboratory tests were carried on based on the consolidation-resistivity test principle which proposed by Fukue, and the effects of water contents and leachate concentrations on resistivity were analyzed. The quantitative relationship between the compression coefficients and resistivity characteristic values at different pore water state was also analyzed. The results showed that The intrusion of contaminated liquid will lead to a sharp decrease in soil resistivity, and the difference in resistivity between specimens with different contamination concentrations is small; the resistivity response to moisture is higher at low water content, and begins to decrease as the water content increases, Sudden drop in resistivity at 0 to 100 kPa; when the stress increases to 100 kPa, the resistivity gradually stabilizes; the relationship between the compression coefficient and the characteristic value of resistivity is further fitted using the water content state of the waste leachate as an intermediate variable, and it shows an exponentially decreasing trend. Then, an engineering classification suggestion of resistivity characteristic value was proposed to evaluate the effect of contamination loess by landfill leachate.