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Title |
Micro-silica Mixed Aqua-epoxy for Concrete Module Connection in Water : Part 2 - Structural Application and Evaluation
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Authors |
최진원(Jin-Won Choi) ; 유영준(Young-Jun You) ; 정연주(Youn-Ju Jeong) ; 권성준(Seung-Jun Kwon) ; 김장호(Jang-Ho Jay Kim) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.1.029 |
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Keywords |
초대형 부유 콘크리트 구조물 ; 콘크리트 모듈 ; 마이크로 실리카 ; 수중용 에폭시 ; 응력 집중 ; 균열 전이 VLFS ; concrete module ; micro silica ; aqua-epoxy ; stress concentration ; crack propagation |
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Abstract |
Recent studies to develop Very Large Floating Structure(VLFS) has shown that the construction procedure of the structure needs to acquire precast concrete module connection system using prestressing. However, the loads occurring on water are complex combinations of various condition, so the safe and stable performance of the module joints and bonding materials are key to the success of the construction. Therefore, micro-silica mixed aqua-epoxy development was introduced in Part 1 using a bonding material developed in this study. The performance of the micro-silica mixed aqua-epoxy(MSAE) applied joint of concrete module specimens connected by prestressing tendon was evaluated to verify the usability and safety of the material. RC beam, spliced beam connected by prestressing tendon and MSAE, and continuous prestressed concrete beam were tested for their initial cracking and maximum loads as well as cracking procedure and pattern. The results showed that the MSAE can control the stress concentration effect of the shear key and the crack propagation, and the maximum load capacity of MSAE joint specimens are only 5% less than that of continuous RC specimen. The details of the study are discussed in detail in the paper.
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