Feasibility of Using Electric Field Line to Analyze the IonicMigration Behavior of Two-Dimension Electric Field ALMT

• Main Authors: Chun-yao Huang, 黃俊堯
• Other Authors: Wen-Tian Guo
• Format: Others
• Language: zh-TW
• Published: 101
• Online Access: http://ndltd.ncl.edu.tw/handle/80360751173903241656

碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 100 === The Accelerated Lithium Migration Technique (ALMT) uses electrical characteristic to remove Na+ and K+ from concrete, and simultaneously drive Li+ into concrete to inhibit alkali-silica reaction (ASR). Studied since 1998, we has mastered many ionic migration behavior and the theoretical model of ALMT, but the results of theoretical model research, were mainly established on a frame of 1-D electric field. It can be expected that the electron arrangement of the ALMT practice application not limit to the 1-D electric field arrangement. The results showed that the modules of carbon electrode, electrolyte electrode, and mortar electrode all can be used to estimate the distributions of the equipotential line and the equielectrical line. The module of electrolyte electrode used to draw the equielectrical line of ALMT, compares to the modules of carbon electrode and mortar electrode, can obtain a uniform and smooth equilelectrical line. The equipment of electrolyte electrode obtains easily, operats simply, and cheap, therefore the electrolyte electrode is suitable to be the simulation tools for simulating the equilelctrical line in practical ALMT utilization. In the simulation experiments of two-dimensional electrical field, found that the system resistant of line-line electrode will reduce, approximately 10 days the voltage becomes stable, and the voltage approximately reduce 48.7 ~ 55.3%. The voltage of plane-line electrode will increase gradually to 17.7 ~ 26.2 %. The voltage of plane-plane electrode has the higher increasing value, and the voltage approximately increases 82.7 ~ 84.2 %. Utilizing theoretical value from 1-D electric field cation transfer move and conception zoning electric field line distribution to estimate 2-D electric field cation content after 28 days within test body, as the total alkali content designed for 2%, the specimen can move free state Na+ the specimen approximately 60 ~ 97% total of Na+ amount, as free state K+ specimen 75 ~ 82% total of K+ the amount. Comparing theoretical value correction alkali content with rate and test values, similarity is found to prove 2-D electric field ALMT test, using concept of electric field lines to distinguish different amount of 1-D theory of ion transport model begot from regional ALMT test zoning, in order to predict results of the ion transport analysis.