콘크리트학회논문집 (Journal of the Korea Concrete Institute)

  • 제28권5호
  • /
  • Pages.571-579
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  • 2016
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  • 1229-5515(pISSN)
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  • 2234-2842(eISSN)
한국콘크리트학회 (Korea Concrete Institute)
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초속경 LMC를 이용한 콘크리트 포장의 진동특성

Vibration Properties of Concrete Overlays using RS-LMC

  • Kim, Min-June (Dept. of Civil Environmental Engineering, Honam University) ;
  • Shin, Geun-Ock (Dept. of Civil Environmental Engineering, Honam University) ;
  • Joo, Nak-Chin (Dept. of Structure, Korea Highway Corporation) ;
  • Lee, Gwang-Jo (Dept. of Structure, Korea Highway Corporation) ;
  • Jeong, Je-Pyong (Dept. of Civil Environmental Engineering, Honam University)
  • 투고 : 2016.04.01
  • 심사 : 2016.08.10
  • 발행 : 2016.10.30
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초록

타설 후 3시간 만에 교통개방이 가능하기 때문에 최근 교량상판 교면개량공사 재료로 RS-LMC가 많이 사용되고 있다. 고속도로 상의 보수공사는 차량의 통행제한이 어렵기 때문에 RS-LMC를 사용한 교량의 교면개량공사는 초기양생단계에서부터 진동에 노출되게 되고 차량진동에 의해 균열이 발생한다. 본 연구에서는 RS-LMC의 초기양생단계에서 진동에 의한 균열특성을 파악하고자 12개의 실험체를 제작하여 실험을 수행하였다. 주요 실험변수는 라텍스-시멘트비(L/C)와 진폭이며 실제 교량의 진동환경을 모사할 수 있는 포장진동시험장치(Pavement Shaking Table)를 이용하여 진동실험을 하였다. 실험결과, 라텍스-시멘트비(L/C)가 증가할수록 균열 개수와 균열의 총 길이가 감소하는 경향이 나타났으나 15% 이상에서는 수렴하였다. 또한 Walter, D, G와 설계기준들이 제시하고 있는 균열 발생 변형률보다 훨씬 작은 변형률에서 균열이 발생하였다.

RS-LMC (Rapid Setting Latex Modified Concrete) has been widely used as repair material for bridge deck overlay or rehabilitation, because the overlaid pavement could be opened to the traffic after 3 hours of curing. Although the field performance of RS-LMC generally indicates that it has an excellent bonding to the substrate and shows a long term performance, the crack by vibration of vehicles have been happened on the overlay of bridges in technical reports. In this study, experimental research was carried out to evaluate the vibration properties of RS-LMC overlays by using P.S.T (Pavement Shaking Table). Total 12 specimens were tested and the variables are Latex-cement ratio (L/C) and amplitude of vibration. The result shows that the number of cracks and the total length of cracks are reduced as the increase of Latex-cement ratio (L/C) until 15%. And the crack occurs at a very small strain than the proposed values by Walter, D, G and design codes.

키워드

참고문헌

  1. Cho, H. N., Choi, H. H., Jung, P. K., and Lim, J. K., "A Study on Life Cycle Cost Analysis of Latex Modified Concrete Pavement for Bridges", Korea Institute for Structural Maintenance Inspect, Vol.5, No.4, pp.185-195.
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  8. Korea Concrete Institute "Concrete Design Code", 2012, pp.60-90.
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