Electric Resistance Tests on Compacted Clay Material under Dynamic Load Coupled with Dry‐Wet Cycling

Abstract

The study of compacted clay material under dynamic load coupled with dry‐wet cycling is one of the most important areas in the field of transportation. In this paper, experiments in terms of compacted clay under dynamic load coupled with dry‐wet cycling are performed, and synchronous resistivity tests are also conducted. According to the test results, the influences of cumulative plastic strain, dry‐wet cycles, and amplitudes on the soil resistivity are analyzed. Then a new damage factor based on resistivity is proposed to evaluate the long‐term performance of compacted clay material. The result of research shows that the evolution of the soil resistivity can be divided into two stages, which has a contrary tendency with that of cumulative plastic strain. The dry‐wet cycles and amplitudes have a significant effect on the damage of the compacted soil, which indicates that the dry‐wet cycling of compacted soil materials should not be ignored in road engineering, especially in rainy and humid areas.