Technical committee on CLARIFICATION OF MECHANISM AND COUNTERMEASURE FOR COMBINED DETERIORATION OF RC STRUCTURE

摘要

The rate of damage propagation within reinforced concrete structures exhibiting combined deterioration is sometimes higher than that within structures exhibiting single deterioration. However, there has been no systematic organization of information in this regard since that performed by the “Technical Committee on Evaluation, Operation and Management Planning of Concrete Structures with Combined Deterioration” by the Japan Concrete Institute from 2000 to 2001. Therefore, this study has sought to organize the research and survey results regarding combined deterioration caused by chloride attack and carbonation, chloride attack and frost damage, chloride attack and alkali–silica reaction (ASR), frost damage and ASR, and delayed ettringite formation (DEF) and ASR, which have been identified since 2002. Thereafter, the propagation mechanism of combined deterioration in actual structures has been closely examined, and measures for repair and reinforcement of these structures are discussed.