ABSTRACT
ABSTRACT: In this paper we apply Electrical Resistance Tomography (ERT) to imaging of concrete. ERT is a nondestructive imaging modality based on electrical measurements acquired using an array of electrodes attached to the boundary of the target. In ERT alternating current is injected to the target using the electrodes, and the resulting voltages are measured using the same electrodes. These electrical boundary measurements are used for reconstructing the internal (3D) conductivity distribution of the target. In concrete e.g. metals (reinforcement bars and fibers), cracks, air voids, moisture and chlorides carry contrast with respect to conductivity, and hence ERT might serve as a tool to get information of those properties/structures. Advantages of ERT are that it is a relatively inexpensive, quick and safe modality. We applied ERT to imaging a set of concrete samples. The results suggest that ERT can be used as tool for nondestructive testing of concrete.
