Abstract
Electrical resistivity is measured simultaneously during unconfined compression (UC) tests of undisturbed, reconstituted, and artificially cemented loess specimens. Test results indicate that both artificially cemented and undisturbed loess specimens are of typical structural characteristics. The stress-strain relationship of structured loess during unconfined compression test is actually a multistage development process, and it can be characterized by the variation of corresponding electrical resistivity, which thereby provides a potential monitoring method of soil behavior and failure under compression. In addition, the secant slope of electrical resistivity may be adopted to evaluate the soil structure of loess specimens. The relationship between the secant slope of electrical resistivity and vertical strain can be fitted well with the function of exponential growth.
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