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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/49813


    Title: BEHAVIOR OF CATIONS IN MORTAR UNDER ACCELERATED LITHIUM MIGRATION TECHNIQUE CONTROLLED BY A CONSTANT VOLTAGE
    Authors: Liu,CC;Wang,WC;Lee,C
    Contributors: 土木工程學系
    Keywords: CEMENT-BASED MATERIALS;ELECTROCHEMICAL METHOD;PORE STRUCTURE;CONCRETE
    Date: 2011
    Issue Date: 2012-03-27 16:17:27 (UTC+8)
    Publisher: 國立中央大學
    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.
    Relation: JOURNAL OF MARINE SCIENCE AND TECHNOLOGY-TAIWAN
    Appears in Collections:[土木工程學系 ] 期刊論文

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