International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
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Prediction of Durability for RC Columns with Crack and Joint under Carbonation Based on Probabilistic Approach

  • Kwon, Seung-Jun (Advanced Technology Team, Korea Conformity Laboratories) ;
  • Na, Ung-Jin (Busan Port Construction Office, Ministry of Land, Transport and Maritime Affairs)
  • Received : 2010.08.16
  • Accepted : 2011.06.17
  • Published : 2011.06.30
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Abstract

Carbonation in RC (reinforced concrete) structure is considered as one of the most critical deteriorations in urban cities. Although RC column has one mix condition, carbonation depth is measured spatially differently due to its various environmental and internal conditions such as sound, cracked, and joint concrete. In this paper, field investigation was performed for 27 RC columns subjected to carbonation for eighteen years. Through this investigation, carbonation distribution in sound, cracked, and joint concrete were derived with crack mappings. Considering each related area and calculated PDF (probability of durability failure) of sound, cracked, and joint concrete through Monte Carlo Simulation (MCS), repairing timings for RC columns are derived based on several IPDF (intended probability of durability failure) of 1, 3, and 5%. The technique of equivalent probability including carbonation behaviors which are obtained from different conditions can provide the reasonable repairing strategy and the priority order for repairing in a given traffic service area.

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References

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