• Title/Summary/Keyword: 콘크리트 열화

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Technology for Controlling Biochemical Corrosion by Sulfur-oxidizing Bacteria of Sewage Concrete Construction applied Antimicrobial Concrete (항균 콘크리트를 적용한 정화조 및 하수처리 콘크리트 구조물의 황산화세균에 의한 생화학적 부식 저감 기술)

  • Kim, Do-Su;Khil, Bae-Su;Sohn, Yu-Shin;Lee, Seung-Hoon
    • Proceedings of the Korea Concrete Institute Conference
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    • 2008.11a
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    • pp.907-910
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    • 2008

  • Recently sewage facilities mainly consisted of concrete structures are being deteriorated seriously by biochemical reaction originated from sulfur-oxidizing bacteria. To prevent biochemical corrosion of the sewage concrete, antibiotics which inhibit growth of sulfur-oxidizing bacteria have to be developed and applied necessarily. In this study, we are going to introduce technology which biochemical corrosion of sewage facilities concrete could be controlled effectively by antibiosis of antimicrobial concrete

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Numerical Modeling of Heat Transfer in Reinforced Concrete Columns Exposed to Fire (화재에 노출된 철근콘크리트 기둥의 수치해석적 열전달 모델)

  • Lee Chadon;Shin Yeong-Soo;Lee Seung-Whan;Lee Chang-Eun
    • Journal of the Korea Concrete Institute
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    • v.17 no.6 s.90
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    • pp.871-878
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    • 2005

  • Reinforced concrete columns exposed to fire experience severe deterioration in material properties and subsequent structural capacities. Degree of losses in structural capacity of a column due to fire-damage mainly depends on the amount of heat transferred into the column during the fire. A reasonable heat transfer model of fire-damaged reinforced concrete column needs to take into account the heat-dependent nonlinear properties of heat conductivity and heat capacity of concrete as well as the evaporation of moistures in a section during the fire. Compared to the previously suggested models, the developed model in this study has included all these parameters in its numerical expressions based on explicit finite difference method. The developed model could predict the temperature changes with a reasonable accuracy for the columns exposed to fire.

  • https://doi.org/10.4334/JKCI.2005.17.6.871 인용 PDF KSCI