Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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A Comprehensive Analysis of the Influence of Oxygen Diffusion on Concrete Cracks Triggered by Reinforcement Corrosion

철근 부식으로 인한 콘크리트 균열발생에 산소확산성의 영향에 대한 해석적 연구

  • Nam, Min-Seok (Department of Architecture and Ocean space, Korea Maritime and Ocean University) ;
  • Park, Dong-Cheon (Department of Architecture and Ocean Space, Korea Maritime and Ocean University)
  • Received : 2023.03.03
  • Accepted : 2023.04.04
  • Published : 2023.04.20
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Abstract

In this study, the analysis of concrete cracks was conducted with a total of three variables: coating thickness, oxygen diffusion rate, and reinforced diameter of reinforced concrete structures. Cracks occurred after about 3, 4, and 6 years at the coating thickness of 30, 40, and 50mm when the coating thickness was used as a variable, and cracks occurred after about 4, 5, and 10 years at oxygen diffusivity of 2e-9, 2e-11, and 2e-12(m2/s) when the oxygen diffusion rate was used as a variable. In the case of reinforcing bar diameters, cracks occurred after about 4, 3, and 2 years on the reinforcing bar diameters of D10, D19, and D25.

본 연구에서는 철근콘크리트의 피복두께, 산소확산속도, 철근직경의 총 세 가지 변수로 콘크리트 균열에 대한 해석을 실시하였다. 피복두께를 변수로 하였을 때 30, 40, 50mm의 피복두께에서 약 3년, 4년, 6년경과 후 균열이 발생하였고 산소확산속도를 변수로 하였을 때 2e-9, 2e-11, 2e-12(m2/s)의 산소확산도에서 약 4년, 5년, 10년경과 후 균열이 발생하였다. 철근직경의 경우 D10, D19, D25의 철근직경에서 약 4년, 3년, 2년경과 후 균열이 발생하였다.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korean government (No. 2019R1A2C1088029).

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