Abstract:
Silt and carbon were used to prepare conductive geo-material, the testing method characterized by distributed electrodes on surface of the soil sample was adopted to measure the distribution of internal resistance increment along the direction of compression. Test results indicate that the resistance variation rate induced from the initiation of the internal fissures can represent the stress state synchronized and sensitive. According to the measurement of resistance variation rate between different electrodes, the propagation of fissures in different zones can be revealed. This study shows that the resistance is sensitive to the extension of fissures. The testing method with distributed electrodes can capture and reflect the evolution of fissures in different zones of soil sample under uniaxial compression. And it has the preliminary capacity to self-test.