EVALUATION OF TEST METHOD USING SMALL SIZED SPECIMENS FOR RESISTANCE TO SODIUM AND MAGNESIUM SULFATE SOLUTION
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- HANEHARA Shunsuke
- IWATE UNIVERSITY, Faculty of Engineering
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- HATAKEYAMA Ito
- IWATE UNIVERSITY, Graduate School Student
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- OYAMADA Tetsuya
- IWATE UNIVERSITY, Faculty of Engineering
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- NAKAMURA Daiki
- IWATE UNIVERSITY
Bibliographic Information
- Other Title
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- 小片浸漬試験方法による硫酸塩劣化の評価
Abstract
The new evaluation test method with small sized specimens of 8mm cubic for short period was investigated in our former study, in order to evaluate resistance of salt scaling of concrete. In this study, this evaluation method is applied for evaluation of resistance to sodium and magnesium sulfate solution. Appearance change of specimens, formation of new chemicals to destroy the specimens and analysis of microstructure are investigated. In case of sodium sulfate solution dipped, ettringite is precipitated in specimens and specimens expand and specimens collapse at last. Residue mass ratio decreases to zero. In case of magnesium sulfate solution dipped, magnesium hydroxide precipitated on the surface of specimens, gypsum also formed inside of magnesium hydroxide phase and grows into the specimens. Crack grows with the precipitation of gypsum. Residue mass ratio became larger than 100％.
Journal
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- Cement Science and Concrete Technology
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Cement Science and Concrete Technology 67 (1), 363-369, 2014
Japan Cement Association
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Keywords
Details 詳細情報について
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- CRID
- 1390282679806323456
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- NII Article ID
- 130004745774
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- ISSN
- 21873313
- 09163182
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed