| Summary: | 碩士 === 國立臺灣海洋大學 === 材料工程研究所 === 99 === Ponding test is one of methods to evaluate the durability of concrete materials, but it takes more than two months in this procedure, in order to economize the time used in access durability of cementitious materials, the Accelerated chloride migration test had developed (ACMT), which used 24 volts as driving force. In this study, the final penetration depth could be found after curve fitting, when there caused the same penetration depth, the time relation will be determined. In this project, three groups of mortars with different mineral mixtures (fly ash, slag and fly ash plus slag), and each group also designed for four kinds of water-to-binder ratios (w/c = 0.35, 0.45, 0.55, and 0.65), twelve mixtures totally, after processed four kinds of migration time of ACMT, and three kinds of ponding time, the profile of chloride ions in each specimen could be observed, and then discuss the relation between the migration time and Ponding time in ACMT and Ponding test, respectively. From the test result in this study, we can concluded that the time relation between ACMT and ponding test would not be affected by the difference of mortar mixture, which including mineral content and water-to-binder ratio, moreover, the time relation showed a very good linear relationship, the non-steady test result of ACMT cooperate with the conclusion of this study could be used to assess the correspond ponding time of cementitious materials in the future.
|
|---|
