Abstract
Since port structures are exposed in the severe natural condition, it is difficult to estimate the deterioration of components of port structures frequently. This paper presents the more effective procedure for efficient maintenance of RC deck in open-type wharf. Kriging method, a typical method in geostatistics, was applied in this study to estimate the deterioration of a target RC deck using inspection data such as deterioration degree from visual inspection and concrete chloride ion tested from in-situ samples. The results show that Kriging method is useful to figure out the distribution of concrete chloride ion and to predict the deterioration process.