BEHAVIOR OF CATIONS IN MORTAR UNDER ACCELERATED LITHIUM MIGRATION TECHNIQUE CONTROLLED BY A CONSTANT VOLTAGE

Authors

Chih-Chien Liu, Department of Civil Engineering, ROC Military Academy, Fengshan 83059, Taiwan, R.O.C.
Wei-Chien Wang, Department of Civil Engineering, Chung Yuan Christian University, Chung Li 32023, Taiwan, R.O.C.Follow
Chau Lee, Department of Civil Engineering, National Central University, Jhongli 32001, Taiwan, R.O.C.

Abstract

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.

Recommended Citation

Liu, Chih-Chien; Wang, Wei-Chien; and Lee, Chau (2011) "BEHAVIOR OF CATIONS IN MORTAR UNDER ACCELERATED LITHIUM MIGRATION TECHNIQUE CONTROLLED BY A CONSTANT VOLTAGE," Journal of Marine Science and Technology: Vol. 19: Iss. 1, Article 4.
DOI: 10.51400/2709-6998.2134
Available at: https://jmstt.ntou.edu.tw/journal/vol19/iss1/4