Advances in concrete construction

  • 제19권4호
  • /
  • Pages.237-246
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  • 2025
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  • 2287-5301(pISSN)
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  • 2287-531X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Service life simulation of RC structures under chloride ingress based on measured corrosion potential and Monte-Carlo simulation

  • Seung-Jun Kwon (Department of Civil and Environmental Engineering, Hannam University) ;
  • Gebremicael Liyew (Department of Architectural Engineering, Chosun University) ;
  • Hyeong-Ki Kim (Department of Architectural Engineering, Chosun University) ;
  • Sung-Cheol Bae (Department of Architectural Engineering, Hanyang University) ;
  • Seung-Yup Jang (Department of Transportation System Engineering, Korea National University of Transportation)
  • 투고 : 2024.04.13
  • 심사 : 2025.03.31
  • 발행 : 2025.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

Determining an allowable chloride concentration is crucial for assessing durability and service life of reinforced concrete (RC) structures exposed to chloride attack. This study measured corrosion potential and current density in embedded steel within cement mortar mixed with chloride ions and several mineral admixtures. Corrosion potential was quantified across a range of initial chloride concentrations (0.0% to 0.8% of binder wt.), and corrosion probability was calculated using Monte Carlo simulation. With a 10% coefficient of variation, corrosion probability ranged from 0.0002% to 0.91% with increasing chloride concentration. Relationships between changing corrosion potential, corrosion probability, and service life were plotted against increasing chloride concentration. Higher ground granulated blast furnace slag and fly ash replacement ratios, coupled with reduced chloride concentration, led to reduced corrosion potential and extended service life. A proposed critical chloride concentration of 0.4% of binder mass was conservative, with service life extending to 120% ~ 12% when increased to 0.8%.

키워드

과제정보

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (RS-2024-00415881) and Industrial Technology Alchemist Project (No.20025773, Development of metropolitan Direct Air Capture and Utilization Technologies) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea).

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