Computers and Concrete

  • 제19권3호
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  • Pages.257-262
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  • 2017
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

The investigation of pH threshold value on the corrosion of steel reinforcement in concrete

  • Pu, Qi (Suzhou Concrete and Cement Products Research Institute Co.,Ltd.) ;
  • Yao, Yan (China Building Materials Academy) ;
  • Wang, Ling (China Building Materials Academy) ;
  • Shi, Xingxiang (Suzhou Concrete and Cement Products Research Institute Co.,Ltd.) ;
  • Luo, Jingjing (Suzhou Concrete and Cement Products Research Institute Co.,Ltd.) ;
  • Xie, Yifei (Suzhou Concrete and Cement Products Research Institute Co.,Ltd.)
  • 투고 : 2016.03.21
  • 심사 : 2016.12.24
  • 발행 : 2017.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

The aim of this study is to investigate the pH threshold value for the corrosion of steel reinforcement in concrete. A method was designed to attain the pH value of the pore solution on the location of the steel in concrete. Then the pH values of the pore solution on the location of steel in concrete were changed by exposing the samples to the environment (CO25%, RH 40%) to accelerate carbonation with different periods. Based on this, the pH threshold value for the corrosion of steel reinforcement had been examined by the methods of half-cell potential and electrochemical impedance spectra (EIS). The results have indicated that the pH threshold value for the initial corrosion of steel reinforcement in concrete was 11.21. However, in the carbonated concrete, agreement among whether steel corrosion was initiatory determined by the detection methods mentioned above could be found.

키워드

과제정보

연구 과제 주관 기관 : Opening Foundation of State Key Laboratory of Green Building Materials

참고문헌

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피인용 문헌

  1. Ingress of chloride ions with carbonation: parameter estimation and analytical simplification pp.2116-7214, 2018, https://doi.org/10.1080/19648189.2018.1528894
  2. Algorithms to measure carbonation depth in concrete structures sprayed with a phenolphthalein solution vol.9, pp.3, 2017, https://doi.org/10.12989/acc.2020.9.3.257
  3. Numerical model for local corrosion of steel reinforcement in reinforced concrete structure vol.27, pp.4, 2017, https://doi.org/10.12989/cac.2021.27.4.385
  4. Climatic Issue in an Advanced Numerical Modeling of Concrete Carbonation vol.13, pp.11, 2017, https://doi.org/10.3390/su13115994