Investigation on complex deterioration of chloride attack and ASR followed by a repair method using lithium salt

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The complex deterioration mechanism of chloride attack and ASR was intensively affected by the environmental temperature, and in the case of the alkali supply from outside of concrete, the penetration of Cl- was suppressed by the progress of ASR around the surface layer of concrete.Moreover, as a repair method against such a complex deterioration mechanism, an electrochemical technique using an electrolyte solution containing the lithium nitrate among various kinds of lithium salt. Especially, when the environmental temperature was 40 degrees Celsius, the penetration of Li+ was promoted remarkably and the expansion of concrete after the treatment was suppressed.