Computers and Concrete

  • 제19권4호
  • /
  • Pages.387-394
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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

A study on effects of water-cement ratio and crack width on chloride ion transmission rate in concrete

  • Li, Yue (The Key Laboratory of Urban Security and Disaster Engineering, MOE, Beijing University of Technology) ;
  • Chen, Xiaohan (The Key Laboratory of Urban Security and Disaster Engineering, MOE, Beijing University of Technology) ;
  • Zhang, Guosheng (The Key Laboratory of Urban Security and Disaster Engineering, MOE, Beijing University of Technology)
  • 투고 : 2016.06.28
  • 심사 : 2017.01.06
  • 발행 : 2017.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

To study the effects of water-cement ratio changes and cracks on chloride ion transmission rate in cracked concrete, RCM method was adopted to accelerate the diffusion of chloride ion in cracked concrete, and the changes in chloride ion concentration and around the cracks are inferred by finite-element method. The test results show that as far as prefabricated cracks on concrete components are concerned, the width thresholds of two cracks on the concrete specimens with a water-cement ratio of 0.5 and 0.6 are 0.05 mm and 0.1 mm respectively, the width threshold of two cracks on the concrete specimens with a water-cement ratio of 0.4 is 0.05 mm and 0.2 mm respectively; and the results of numerical simulation show that the smaller the water-cement ratio is, the more significant effects of cracks on chloride ion transmission rate are. As a result, more attention shall be paid to the crack prevention, repairing and strengthening for high-strength concrete.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Beijing Natural Science Foundation, Beijing Municipal Institutions

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피인용 문헌

  1. The Chloride Ion Penetration Mechanism in Basalt Fiber Reinforced Concrete under Compression after Elevated Temperatures vol.11, pp.21, 2021, https://doi.org/10.3390/app112110137