Influence of parameters on surface resistivity of concrete

Several studies have investigated different techniques for measuring electrical properties of concrete which is an important physical property related to chloride induced corrosion in reinforced concrete structures. This research examined the surface resistivity (SR) and the bulk electrical resistivity (BR) of concrete cylinders for several ternary mixtures at different testing ages. In addition, this study evaluated the influence of various significant parameters namely geometric size, probe spacing, replacement levels of silica fume and metakaolin in ternary based cementitious mixtures on the SR of concrete. New recommendation has been proposed for chloride ion permeability classification on the basis of electrical resistivity and compared with widely used Florida and Louisiana DOT classification. Overall, this study will enable researchers and state highway agencies to use non-destructive SR and BR measurement technique as a potential tool to evaluate ternary based high performance concrete (HPC) mixtures and predict the corrosion rate. (C) 2015 Elsevier Ltd. All rights reserved.