Comment on the prediction of concrete durability service life based on steel-bar corrosion

The accurate and effective prediction of durability service life is the ultimate goal in the study of durability for reinforced concrete structures.In this paper,the progress of durability service life of reinforced concrete based on the steel bar corrosion in recent years is summarized and reviewed systematically,including the steel-bar depassivation service life T i in chloride contained or carbonated concrete,the corrosion-induced crack service life T c,the service life T f based on the corrosive crack width or steel bar corrosion quantity limits.And several basic problems in this domain are proposed for further study,including the definition of durability limit state for concrete structures under given environmental condition and usage requirement,the establishment of concrete durability degradation law model with strong application,and the relevance of durability degradation law under artificial climate and natural environment.