Interfacial Tensile Bond between Substrate Concrete and Repairing Mortar under Freeze-Thaw Cycles
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- Qian Ye
- Department of Civil Engineering and Engineering Mechanics, Columbia University, New York, NY, USA.
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- Zhang Dawei
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China.
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- Ueda Tamon
- Division of Engineering and Policy for Sustainable Environment, Hokkaido University, Sapporo, Japan.
説明
<p>Freeze-thaw cycle is one of the major damage factors of concrete patch repair. Not only the material itself but also the adhesive interface is damaged under freeze-thaw cycles (FTC). Air-entraining agent has long been used to increase the freeze-thaw resistance of concrete materials. However, the effect of air-entraining agent on the adhesive interface has not been explored. The degradation mechanism and failure mode of concrete repair system under FTC has not been studied, either.</p><p>In this study, three kinds of substrate concrete were casted and repaired by two kinds of ordinary Portland cement mortars and one kind of polymer-modified cement mortar (PCM), respectively. With up to 150 FTC, splitting tensile strength and failure modes of composite specimens were experimented. Results showed that air-entraining agent in the repairing mortar greatly influenced adhesive tensile strength under FTC. The water cement ratio and air-entraining agent of substrate concrete insignificantly affected the adhesive interface, but affects failure mode. The adhesive tensile strength of PCM-repaired composite specimens decreased faster than that of ordinary Portland cement mortar-repaired composite specimens although PCM itself showed stronger freeze-thaw resistance than ordinary mortar.</p>
収録刊行物
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- Journal of Advanced Concrete Technology
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Journal of Advanced Concrete Technology 14 (8), 421-432, 2016-08-24
公益社団法人 日本コンクリート工学会
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詳細情報 詳細情報について
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- CRID
- 1390282680194967680
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- NII論文ID
- 130005406619
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- ISSN
- 13473913
- 13468014
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- HANDLE
- 2115/63834
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可