Computers and Concrete

  • 제21권4호
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  • Pages.419-429
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  • 2018
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Evaluation of carbonation service life of slag blended concrete considering climate changes

  • Wang, Xiao-Yong (Department of Architectural Engineering, Kangwon National University) ;
  • Luan, Yao (Department of Civil and Environmental Engineering, Saitama University)
  • 투고 : 2017.07.03
  • 심사 : 2017.12.13
  • 발행 : 2018.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

Climate changes, such as increasing of $CO_2$ concentration and global warming, will impact on the carbonation service life of concrete structures. Moreover, slag blended concrete has a lower carbonation resistance than control concrete. This study presents a probabilistic numerical procedure for evaluating the impact of climate change on carbonation service life of slag blended concrete. This numerical procedure considers both corrosion initiation period and corrosion propagation period. First, in corrosion initiation period, by using an integrated hydration-carbonation model, the amount of carbonatable substances, porosity, and carbonation depth are calculated. The probability of corrosion initiation is determined through Monte Carlo method. Second, in corrosion propagation period, a probabilistic model is proposed to calculate the critical corrosion degree at surface cracking, the probability of surface cracking, and service life. Third, based on the service life in corrosion initiation period and corrosion propagation period, the whole service life is calculated. The analysis shows that for concrete structures with 50 years service life, after considering climate changes, the service life reduces about 7%.

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea (NRF)

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피인용 문헌

  1. Algorithms to measure carbonation depth in concrete structures sprayed with a phenolphthalein solution vol.9, pp.3, 2018, https://doi.org/10.12989/acc.2020.9.3.257
  2. Climatic Issue in an Advanced Numerical Modeling of Concrete Carbonation vol.13, pp.11, 2018, https://doi.org/10.3390/su13115994