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2017 Vol.8, Issue 4 Preview Page
An efficient and economical repair strategy for life cycle cost assessment of RC structure deteriorated by chloride attack
Hanseung Lee1
,
Jitendra Kumar Singh12*
,
Inseok Kang1
,
Sunyoung Yun1
,
Mohamed A. Ismail3
,
,
,
,
1Department of Architectural Engineering, Hanyang University
2Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST)
3Department of Civil and Construction Engineering, Faculty of Engineering and Science, Curtin University Malaysia
*교신저자. *Corresponding Author. 
December 2017. pp. 332-348
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Abstract

Structural deterioration is a major problem when it considered for long-term performance. Maintenance of existing reinforced concrete (RC) structure is a real challenge due to insufficient funds and lack of pre-scheduled planning. The structure which is exposed to or in sea environment is initiated the corrosion after some period of service. The initiation of corrosion of any exposed structure depends on thickness of concrete, exposure environment, used protective scheme i.e. coating, inhibitor, patching etc. This paper focus on build an efficient and economical maintenance strategy through proper decisions for repair of construction. Since structures exposed to sea environments are mostly deteriorated by chloride, therefore, an appropriate maintenance strategy is required in order to safely sustain performance during service. Regarding appropriate repair strategies, cost has a huge influence on the decisions made by structure owners. Therefore, this paper discusses the Life Cycle Cost (LCC) of repair in order to maintain a structure service life. By introducing probability-based service life prediction using the Monte Carlo bootstrapping method, the most economically effective time for repair of a deteriorated structure is determined according to estimated repair, risks, and opportunity costs. We have studied the initiation of corrosion from 10-60% and found through probabilistic model that 20 mm patching for 40% initiation of corrosion is most economical and predictable than others. The patching of structure is easier and economical than other protective systems.

Keywords
composites structures
corrosion
durability
surface treatments
life cycle cost

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Information
  • Publisher :Sustainable Building Research Center (ERC) Innovative Durable Building and Infrastructure Research Center
  • Publisher(Ko) :건설구조물 내구성혁신 연구센터
  • Journal Title :International Journal of Sustainable Building Technology and Urban Development
  • Volume : 8
  • No :4
  • Pages :332-348
  • Received Date : 2017-09-20
  • Accepted Date : 2017-11-25
  • DOI :https://doi.org/10.22712/susb.20170031
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