Effects of Temperature on Conduction and Polarization in Portland Cement Mortar

The electrical impedance of Portland cement mortar was measured over the temperature range 10–80°C. Both the real and imaginary components of the complex impedance were found to be temperature dependent and linked through an Arrhenius relationship over the range 10–50°C. Both conduction and polarization processes are thermally activated with an activation energy of, respectively, 19.4 and 4.6 kj/mol. At temperatures in excess of 50°C, sample impedance was almost independent of temperature.