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Title |
Micro-silica Mixed Aqua-epoxy for Concrete Module Connection in Water : Part 1 - Material Development and Evaluation
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Authors |
최진원(Jin-Won Choi) ; 김영준(Young-Jun Kim) ; 유영준(Young-Jun You) ; 권성준(Seung-Jun Kwon) ; 김장호(Jang-Ho Jay Kim) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.1.021 |
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Keywords |
콘크리트 모듈 ; 부유 구조물 ; 모듈 간 접합 ; 수중용 에폭시 ; 마이크로 실리카 concrete module ; floating structure ; connection system ; aqua epoxy ; micro silica |
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Abstract |
Recent studies on concrete floating structure development focused on connection system of concrete modules. Precast concrete modules are designed to be attached by prestressing in the water, exposing the structure to the loads from water and making the construction difficult. Therefore, a development of bond material became a key issue in successful connection of floating concrete modules. In this study, micro-silica mixed aqua epoxy (MSAE) is developed for the task. Existing primer aqua epoxy, originally used as a bond material for the retrofit of concrete structures using fiber reinforced polymers, is evaluated to find the optimum micro-silica added mix proportion. Micro-silica of 0~4 volume % was mixed in standard mixture of aqua epoxy. Then, the material property tests were performed to study the effect of micro-silica in aqua epoxy by controlling the epoxy silane proportion by 0, ±5, ±10%. The optimum mix design of MSAE was derived based on the test results. The MSAE was used to connect concrete module specimens with the epoxy thickness variation of 5, 10, and 20mm. Then, 3-point loading test was performed to verify the bond capacity of MSAE. The results show that MSAE improves the bond capacity of concrete module.
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