DOI QR코드

DOI QR Code

Relation Between Water Content Ratio and Fire Performance of Class 1 Structural Light Weight Aggregate Concrete

1종 경량골재콘크리트의 함수율과 내화특성

  • Song, Hun (Korea Institute of Ceramic Engineering and Technology)
  • 송훈 (한국세라믹기술원 에너지환경소재본부)
  • Received : 2014.12.12
  • Accepted : 2014.12.24
  • Published : 2014.12.30

Abstract

Structural light weight aggregate concrete are made with both coarse and fine light weight aggregates, but it is common with the high strength concrete to replace all or part with normal weight sand be called class 1 structural light weight aggregate concrete. Fire resistance of structural light weight aggregate concrete are determined by properties of high water content ratio and explosive spalling. Especially, structural light weight aggregate concrete is occurred serious fire performance deterioration by explosive spalling stem from thermal stress and water vapor pressure. This study is concerned with experimentally investigating fire resistance of class 1 structural light weight concrete. From the test result, class 1 structural light weight concrete is happened explosive spalling. The decrease of cross section caused by explosive spalling made sharp increasing gradient of inner temperature.

경량골재콘크리트는 구조물의 자중경감을 목적으로 경량골재를 적용하여 제조한 콘크리트로 구조물의 고층화 및 대형화에 효과적으로 대응할 수 있는 장점이 있다. 하지만 경량골재는 다공체이므로 화재와 같은 고온에 노출되는 경우 수증기압이나 열응력에 의해 골재 주변으로 응력이 집중될 가능성이 커 폭렬이 발생하기 쉽다. 본 연구는 구조용 경량골재를 사용한 1종 경량골재콘크리트의 함수율과 내화특성과의 관계를 검토코자 하며, 실험결과 압축강도와 함수율이 높은 경량골재콘크리트는 폭렬의 가능성이 높기 때문에 흡수율이 작은 골재의 사용이나 폭렬방지를 위한 대책이 필요하다.

Keywords

References

  1. AIK. (2008). Fire resistance design guidelines for high strength concrete structures, 178-179.
  2. ALA. (1998). ALA Concrete, High strength concrete. Technical report of light weight concrete, 1 [In Japanish].
  3. JCI. (2002). Committe report for fire safety of concrete structures [In Japanish].
  4. MOLIT. (2008). Management criteria of high strength concrete in column and beam, MOLIT Notification No. 2008-334.
  5. Song, H., Jo, Y.K, Chu, Y.S, and Lee, J.K. (2013). Fire resistance of light-weight concrete using structural light-weight aggregate, Journal of the construction and environment research institute, 8(2), 146-153.

Cited by

  1. Research trends and design guidelines for fire resistance of structural concrete in South Korea vol.69, pp.7, 2017, https://doi.org/10.1680/jmacr.15.00361