ASR in Experimental PC Girders Caused by Late- or Early-Expansive Aggregate from the Hokuriku Region, Central Japan

An accelerated expansion test was carried out using concrete cores taken from outdoor-exposed experimental prestressed concrete girders which were prepared by using aggregate from the Shogawa and Joganjigawa Rivers in the Hokuriku region in Japan. The purpose of the study was to investigate the reactivity of the aggregates and the deterioration found after the outdoor exposure and then compare the findings with the results of the accelerated expansion test. The test results showed that expansion depended significantly on the presence or absence of alkali-silica reaction (ASR) at the time of core sampling.