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Effect of Climate Change on Service Life of High Volume Fly Ash Concrete Subjected to Carbonation—A Korean Case Study

Author

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  • Ki-Bong Park

    (College of Engineering, Department of Architectural Engineering, Kangwon National University, Chuncheon-Si 24341, Korea)

  • Xiao-Yong Wang

    (College of Engineering, Department of Architectural Engineering, Kangwon National University, Chuncheon-Si 24341, Korea)

Abstract

The increase in CO 2 concentrations and global warming will increase the carbonation depth of concrete. Furthermore, temperature rise will increase the rate of corrosion of steel rebar after carbonation. On the other hand, compared with normal concrete, high volume fly ash (HVFA) concrete is more vulnerable to carbonation-induced corrosion. Carbonation durability design with climate change is crucial to the rational use of HVFA concrete. This study presents a probabilistic approach that predicts the service life of HVFA concrete structures subjected to carbonation-induced corrosion resulting from increasing CO 2 concentrations and temperatures. First, in the corrosion initiation stage, a hydration-carbonation integration model is used to evaluate the contents of the carbonatable material, porosity, and carbonation depth of HVFA concrete. The Monte Carlo method is adopted to determine the probability of corrosion initiation. Second, in the corrosion propagation stage, an updated model is proposed to evaluate the rate of corrosion, degree of corrosion for cover cracking of concrete, and probability of corrosion cracking. Third, the whole service life is determined considering both corrosion initiation stage and corrosion propagation stage. The analysis results show that climate change creates a significant impact on the service life of durable concrete.

Suggested Citation

  • Ki-Bong Park & Xiao-Yong Wang, 2017. "Effect of Climate Change on Service Life of High Volume Fly Ash Concrete Subjected to Carbonation—A Korean Case Study," Sustainability, MDPI, vol. 9(1), pages 1-15, January.
    • Handle: RePEc:gam:jsusta:v:9:y:2017:i:1:p:157-:d:88450
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    Citations

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    Cited by:

    1. Hyung-Min Lee & Han-Seung Lee & Sang-ho Min & Seungmin Lim & Jitendra Kumar Singh, 2018. "Carbonation-Induced Corrosion Initiation Probability of Rebars in Concrete With/Without Finishing Materials," Sustainability, MDPI, vol. 10(10), pages 1-15, October.
    2. Xiao-Jian Gao & Xiao-Yong Wang, 2017. "Impacts of Global Warming and Sea Level Rise on Service Life of Chloride-Exposed Concrete Structures," Sustainability, MDPI, vol. 9(3), pages 1-15, March.
    3. Chao Jiang & Jing Fang, 2020. "Time-Dependent Reliability-Based Service Life Assessment of RC Bridges Subjected to Carbonation under a Changing Climate," Sustainability, MDPI, vol. 12(3), pages 1-18, February.

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