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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50785

Title: A three-phase model for predicting the effective chloride migration coefficient of ITZ in cement-based materials
Authors: Chung-Chia Yang
Shih-Han Weng
Contributors: 國立臺灣海洋大學:材料工程研究所
Keywords: Open access content
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Date: 2012-10
Issue Date: 2018-10-23T08:20:29Z
Publisher: Magazine of Concrete Research
Abstract: Abstract: Specimens (water/cement ratio of 0·35) with various volume fractions (0, 0·1, 0·2, 0·3, 0·4 and 0·5) of fine aggregates were cast and tested to investigate the behaviour of the interfacial transition zone in mortar and the effect of the interfacial transition zone on the chloride migration coefficient. The double-inclusion method and Mori–Tanaka theory were used to predict the migration coefficient of three-phase composite materials, which are cement paste, interfacial transition zone and fine aggregate. There are two stages to calculate the overall migration coefficient of mortar. The first stage, the equivalent migration coefficient of fine aggregate and the interfacial transition zone, was calculated by Hori and Nemat-Nasser's double-inclusion model. The second stage, the equivalent migration coefficient, was used to calculate the overall migration coefficient of the mortar composite by Mori–Tanaka theory. A comparison was conducted between the theoretical and experimental data in this study. The results indicated that the migration coefficient of the interfacial transition zone is 1·5 to 10 times the migration coefficient of cement paste when an interfacial transition zone thickness of 20 to 30 μm is assumed.
Relation: 65(3) pp.193-201
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50785
Appears in Collections:[材料工程研究所] 期刊論文

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