Abstract
Nowadays the half cell potential method or the polarization resistance method is mainly used as a non-destructive testing method to presume corrosion state of reinforcing bars in concrete. In these methods, however, some destruction works are needed such as to expose edges of reinforcing bars from concrete.
Considering these situations, fundamental studies were executed to presume the positions and the corrosion state of reinforcing bars in concrete structures using the direct current resistivity method and the induced polarization method, in which no destruction works are needed.
In order to achieve high accuracy and site applicability a portable electric measurement device was newly developed for reinforced concrete structures. In the experiment, the influence given to the apparent resistivity and the apparent chargeability whose differences between the corrosion state and the corrosion causes of reinforcing bars, etc. are the electrical nature of the reinforced concrete structure was examined. In addition, several kinds of inversion analysis were carried out using the three dimensional electric field program, which was already reported, and the validity of the experimental results were confirmed.
