Abstract
Concrete deterioration exerts a large influence on the endurance performance of a concrete structure. The present study inspects safety with respect to maintenance and management by conducting the deterioration progress forecast of alkali aggregate reaction that is one of the concrete deterioration factors. The target of the forecast is a real structure where alkali aggregate reaction ASR has been progressed. To evaluate the current and future situation of ASR the analytical method by which ASR is reproduced is employed. As a result of the analysis, it turned out that the targeted real structure was not in a serious condition not only for the current but also future situation.