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http://dx.doi.org/10.11112/jksmi.2009.13.3.173

Crack Example and Crack Control Method of Very-Early Strength Latex-Modified Concrete  

Choi, Pan-Gil (강원대학교 토목공학과)
Yun, Kyong-Ku (강원대학교 토목공학과)
Lee, Bong-Hak (강원대학교 토목공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.13, no.3, 2009 , pp. 173-180 More about this Journal
Abstract
Very-early strength latex-modified concrete(below ; VES-LMC) was developed for possible early-opening-to-traffic after overlay of bridge deck concrete. The purpose of this study is to analyze the cause of map, transverse and longitudinal cracking in VES-LMC and to provide a control method for minimizing occurrence of cracking. The proposed prevention method against map and transverse cracking was verified by field data. VES cement was modified as the unit cement content was reduced from 390kg/$m^3$ to 360kg/$m^3$. The maximum size of coarse aggregate was increased from 13mm to 19mm. The wire mesh and steel fiber were adopted in concrete mixture. From the results, the proposed prevention method against map and transverse cracking was verified since structural cracking was not occurred until 3 years after overlay.
Keywords
Longitudinal crack; Map crack; Transverse crack; Very-early strength latex-modified concrete;
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1 "초속경 라텍스개질 콘크리트를 이용한 공용 중 교량바닥판콘크리트 보수 및 재포장 공법", 신기술 지정 제427호, 2004
2 최판길, "초속경 라텍스개질 콘크리트의 초기 및 구속건조수축특성" 공학석사학위 논문, 강원대학교 대학원, 2005
3 Horn, M. W., Stewart, C. F., and Boulware,R. L., "Factors Affecting the Durability of Concrete Bridge Decks : Normal vs Thickened Deck-Interim Report No. 3.", Bridge Department, California Division of Highways, CA-HY-4101-37211, 1972
4 Krauss, P.D., and Rogalla, E.A., "Transverse Cracking in Newly Constructed Bridge Decks", National Cooperative Highway Research Program(NCHRP) Report 380, Transportation Research Board, 1996
5 윤경구, 최판길, "VES-LMC 균열발생 원인 및 대책",강원대학교 산학협력단 연구보고서, 2005, pp. 113-124
6 Kosel, H. C. and Michols, K. A., "Evaluation of Concrete Deck Cracking for Selected Bridge Deck Structures of the Ohio Turnpike", Report to Ohio Turnpike Commission, Construction Technology Laboratories(CTL), 1985
7 Yun, K.K, Kim, D.H, Choi, S.Y., "Durability of Rapid-Setting Latex Modified Concrete Against Freeze-Thaw and Chemicals", Journal of TRB, TRR 1869, Washington D.C., 2004,pp. 1-10
8 정원경, 홍창우, 장흥균, 윤경구, "SB라텍스 개질 콘크리트의 동결융해 내구특성", 대한토목학회 논문집 제22권 제5-A호, 2002, pp. 1003-1010
9 최상희, "VES-LMC의 열 특성을 고려한 자기수축"공학석사학위 논문, 강원대학교 산업대학원, 2005