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다국어 초록 (Multilingual Abstract)

The objective of this study is to develop a mortar mixture with high workability and adhesive strength for section jacketing in seismic strengthening technology of existing concrete structures. To achieve targeted requirements of the mortars (initial flow exceeding 200 mm, compressive strength of 30MPa, and adhesive strength exceeding 1MPa), step-by-step tests were conducted under the variation of the following mixture parameters: water-to-binder ratio, sand-to-binder ratio, polymer-to-binder ratio, dosage of viscosity agent, and content of ultra-rapid-hardening cement. The adhesive strength of the mortars was also estimated with respect to the various surface treatment states of existing concrete. Based on the test results, the mortar mixture with the polymer-to-binder ratio of 10% and the content of ultra-rapid-hardening cement of 5% can be recommended for the section jacketing materials. The recommended mortar mixture satisfied the targeted requirements as follows: initial flow of 220 mm, high-early strength gain, 28-day compressive strength of 35MPa, and adhesive strength exceeding 1.2MPa.

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참고문헌 (Reference)

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4 김완기, "VA/E/MMA 터폴리머 분말수지를 이용한 폴리머 시멘트 모르타르의 특성" 대한건축학회 26 (26): 111-118, 2010

5 Lee BH, "Strength development properties of rapid setting latex modified concrete for early stage form removal" 6 : 105-116, 2001

6 김윤일, "RC 보의 단면증설형 보강에서 망상형 철판의 정착과 효용에 관한 실험" 대한건축학회 24 (24): 65-74, 2008

7 Lee CW, "Evaluation of durability and bond strength of polymer powder modified mortars with accelerators" Korea Concrete Institute 559-562, 2005

8 구자술, "CAC 및 석고혼입 CAC를 사용한 초속경 콘크리트-폴리머복합체의 공학적 특성" 한국건축시공학회 16 (16): 97-105, 2016

9 Korea Concrete Institute, "2012 Concrete Design Code of Korea"