Study of the chloride diffusion in mortar: A new method of determining diffusion coefficients based on impedance measurements

Chloride diffusion coefficients can be obtained from traditional two-compartment cell experiments. Typically, either natural diffusion or migration methods are employed. These conventional tests are time-consuming and laborious; thus, in order to obtain chloride diffusion coefficients in shorter time periods, we propose a new method based in impedance spectroscopy. Impedance measurements in the 40 MHz to 100 Hz frequency range allow to obtain diffusion coefficients that correlate well either with those reported in the literature and those obtained using traditional diffusion and migration tests.