An Experimental Study on the Themal Properties of High Strength Concrete Exposed to High Temperature

• DOI: 10.9798/kosham.2012.12.6.087
• Publication Date: 2013-03-05T11:57:02Z
• Authors: Dong-Joon Kim; Seung-Goo Kang; Young-Jin Kwon; Jae-Young Lee; Kazunori Harada
• Keywords: 13. Climate action; 11. Sustainability; 0211 other engineering and technologies; 02 engineering and technology; 7. Clean energy; 12. Responsible consumption

Abstract There is a strong possibility that high strength concrete(HSC) has a serious chance of decreasing efficiency or loss of dfficiencyin case of exposure to high temperature. It is thought that in fire, the Spalling of High Strength Concrete will more seriously occurbecause of water tightness. Generally, heat conductivity depend on transition between a object and heat, so a physical and chem-ical reaction inside concrete has an important role. In this experiment, we measure heat conductivity(W/mK), thermal diffusiv-ity(m 2 /s), and specific heat(J/gK) in points at a range of from 200 o C to 800 o C to review the thermal characteristics of high strengthconcrete exposed to high temperature. In results, fundamental data, which has experimentally examined and is to achieve fireresistive performance of HSC, is provided.Key words : Explosive spalling, High strength concrete, Themal Properties, Fire 요지 화재 시 고온에 고강도콘크리트가 노출되었을 경우에는 심각한 성능저하 및 손상이 발생할 가능성이 매우 높다. 화재 시 고강도 콘크리트는 수밀성으로 인해 폭렬 현상이 더욱 심하게 발생할 것으로 판단되며, 열전도율은 물질의 종류, 온도구배 및 형상에 크게 의존한다. 또한 콘크리트 내부에서 물리·화학적 반응이 중요한 역할을 할 것으로 판단된다. 본 연구에서는 고온에노출된 고강도콘크리트의 열적특성을 o검토하기 위하여 200~800C의 측정온도에서 열선법에 의해 열전도율(W/mK), 열팽창율(m