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

NCUIR > Engineering College > Department of Civil Engineering > journal & Dissertation > Item 987654321/49813

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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:	[Department of Civil Engineering] journal & Dissertation

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