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Advances in Concrete Construction Volume 14, Number 6, December 2022 , pages 369-380 DOI: https://doi.org/10.12989/acc.2023.14.6.369 |
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Behavior of apparent chloride diffusion coefficient of fly ash concrete under long-term marine exposure |
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Yong-Sik Yoon, Jong-Suk Lee, Ji-Young Min and Seung-Jun Kwon
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| Abstract | ||
| In this study, outdoor exposure tests were performed for fly ash concrete considering long-term marine exposures and mix conditions. Different fly ash substitution ratios, water-binder ratios, regional exposure conditions, and exposure periods were considered. As the exposure period increased, the effect of the water.binder ratio on the apparent chloride diffusion coefficient decreased due to reduced chloride ingress. The increase in the diffusion coefficient with the water.binder ratio in concrete with ordinary portland cement was higher than that in fly ash concrete cement. Relationships between the apparent diffusion coefficient and RCPT (Rapid Chloride Penetration Test: passed ion charge) based on mix proportions were proposed with three regional exposure conditions. | ||
| Key Words | ||
| apparent chloride diffusion coefficient; chloride ingress; fly ash; marine exposure test | ||
| Address | ||
| (1) Yong-Sik Yoon, Seung-Jun Kwon: Department of Civil and Environmental Engineering, Hannam University, 70 Hannam-ro, Daedeok-gu, Daejeon 34430, Republic of Korea; (2) Jong-Suk Lee, Ji-Young Min: Department of Structural Engineering Research, Korea Institute of Civil engineering and Building Technology, Goyang 10233, Republic of Korea. | ||
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