Study on Realkalization with Electrolyte Containing Lithium Ion

Abstract

This study tried the application of electrochemical realkalization using Li3BO3 solution as the electrolyte, compaired with the case of usual Na2CO3 solution. The results obtained from this study are shown as follows: (1) The rate of concrete expansion by alkali-silica reaction (ASR) after realkalization using Li3BO3 solution was smaller than the case of Na2CO3 solution. (2) The realkalization effect obtained just after treatment was enough even when Li3BO3 solution was applied like as the case of Na2CO3 solution. (3) The pH value of cover concrete at 1 year after finishing realkalization using Li3BO3 maintained the same level as the case of Na2CO3 solution. Further more, the pH value obtained by realkalization using Li3BO3 solution maintained acceptable level under the accelerated condition of carbonation for 30 days.