ASR Mitigation-effect of Repair and Retrofitting Methods against ASR Damaged Reinforced Concrete Columns

Abstract

In Japan, it became a great matter that a lot of RC columns have been suffering from the serious damage due to ASR. Although some countermeasures were established about 15 years ago, they could not always mitigate ASH completely. Recently, it was founded that reinforcing bars in ASH-damaged concrete structures were also failured. The authors carried out the series of study on ASR mitigation-effect and strengthing-effect of repair and retrofitting methods. The longterm exposure test using real-size specimens and inspection of retrofitted real columns was performed. This paper described their ASH. mitigation-effect.