ABSTRACT
Chloride attack and ASR are serious deterioration mechanisms of concrete structures respectively. Moreover, in the cases of marine environment and cold climate area, complex deterioration of these mechanisms can be observed because of the supply of sea water or de-icing salt. In this study, as a remedial measure against such a complex deterioration, electrochemical penetration of lithium from the electrolyte solution was investigated. It was clarified that electrolyte temperature greatly affected the extent of lithium penetration and the treatment at 40∘C remarkably accelerated lithium penetration into concrete compared with the case of 30∘C. Regarding the kind of lithium salt, LiNO3 solution was most effective among a number of different kinds of lithium salt in the viewpoints of Li+ penetration of into concrete and suppression of concrete expansion.
