The Accelerated Lithium Migration Technique (ALMT) is an electrochemical method to remove Na+ and K+ from concrete, and simultaneously drive Li+ into concrete to inhibit alkali-silica reaction (ASR). This study investigates the relationship between the applied voltage and the migration behavior of cations related to ASR. The results show that after the completion of Na+ and K+ removal, migration of Li+ begins to enter a steady state. With the increase in applied voltage, the removal rate and removable amount of alkalis increases, the required time of alkalis removal and the time for Li+ to pass through the specimen decreases, and the migration coefficients of Li+ increase. Furthermore, the above migration parameters of cations have positive linear relationships with the average current density. After the ALMT process, the average Li/(Na + K) molar ratio of the specimen is sufficiently large to mitigate ASR problems.
Liu, Chih-Chien; Wang, Wei-Chien; and Lee, Chau
"BEHAVIOR OF CATIONS IN MORTAR UNDER ACCELERATED LITHIUM MIGRATION TECHNIQUE CONTROLLED BY A CONSTANT VOLTAGE,"
Journal of Marine Science and Technology: Vol. 19:
1, Article 4.
Available at: https://jmstt.ntou.edu.tw/journal/vol19/iss1/4