Proceedings of the Korean Institute of Building Construction Conference (한국건축시공학회:학술대회논문집)

The Korean Institute of Building Construction (한국건축시공학회)
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Effect of Moisture Migration in Concrete with Hating Rate on Concrete Spalling

가열속도에 따른 콘크리트 내부의 수분이동이 폭렬발생에 미치는 영향

  • 최경철 (충남대학교 건축공학과 BK21플러스) ;
  • 김규용 (충남대학교 건축공학과) ;
  • 남정수 (충남대학교 건축공학과) ;
  • 김홍섭 (충남대학교 건축공학과 BK21플러스) ;
  • 윤민호 (충남대학교 건축공학과) ;
  • 황의철 (충남대학교 건축공학과)
  • Published : 2017.05.17
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Abstract

In this study, it reviewed the effect of moisture migration in concrete with heating rate on concrete spalling. Concrete specimens with compressive strength 30MPa and 110MPa are used and its size is □100×100×h200mm. And, two kinds of heating rate are set such as IS0 834 and 1℃/min. As a result, in the concrete specimen exposed to ISO 834 standard heating condition, moisture could migrate through pore network and surface concrete pieces fall out by generating moisture clog near the surface in 110MPa concrete specimen. Meanwhile, In the case of concrete specimens exposed to 1℃/min. heating condition, it is appeared that moisture could not migrate because temperature is distributed uniformly. Therefore, surface spalling is not occurred with low heating rate. However, in the case of 110MPa concrete specimen is exploded even though it heated by low heating rate.

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