ABSTRACT
The non-contacting electrical resistivity measurement was a newly developed nondestructive method, the change of resistivity could be measured in situ and continuously with this method. A modified NC-ERM was used to measure resistivity of fourteen group specimens. The effects of sand, aggregate, rubber particles, steel fiber and salt solution on the resistivity of the sample were analyzed. The relationship of electrical resistivity and chloride diffusion coefficient was obtained based on the modified non-contacting electrical resistivity and the chloride diffusion coefficient was calculated. An electrical resistivity and a chloride diffusion coefficient predict fractal-like model were established in this paper. The chloride diffusion coefficient calculated by this fractal model was very approach to that of modified non-contacting electrical resistivity method. Through the comparison of the model and this modified non-contacting electrical resistivity method, these two methods may provide an in situ and nondestructive way to evaluate the chloride transportation of cement-based materials.
