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Fiber Cocktail을 혼입한 고강도 콘크리트의 비열 특성 및 모델 제시
김흥열(Kim Heung-Youl),채한식(Chae Han-Sik),전현규(Jeon Hyun-Kyu),염광수(Yom Kwang-Soo) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
This research is to propose the characteristics of the specific heat and the model about the high strength concrete which has up to 100 ㎫ of compression strength in order to set the prospective model for transferring the heat in the high strength concrete depending on the existence of the fiber cocktail. As the result of the research, as the strength of the concrete increases, the value of the specific heat at 100℃ increases but the value from 400~500℃ keeps constant. In case of the high strength concrete 40ㆍ50 ㎫ and 60~100 ㎫, the result is similar. For the 50 ㎫ high strength concrete which is mixed with fly ash 15 % and fiber cocktail (PP 1.0%, strength fiber 0.5%), the value at 600℃ of the internal temperature shows the highest. At 100℃, normal strength concrete of 40~50 ㎫ shows the lower value than the normal concrete, and concrete of 60-100 ㎫ shows the similar characteristics with the normal concrete, but it shows larger value than 40-50 ㎫. Therefore, the concrete shows the high value of the specific heat when it is mixed with only fly ash rather than when it is mixed with nothing. Depending on the amount of the mixture for fiber cocktail with PP and strength fiber, it shows various results. High strength concrete of over 40 ㎫ shows similar characteristics from 400~500℃. And, the specific heat model produced from this research shows the similar behavior with the concrete of 30 ㎫. But, it is set by relative lower grade. And it is set by showing differences depending on the amount of mixture for the fiber cocktail rather than the amount of the mixture for the fly ash.
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