Detection of thermophysical properties for high strength concrete after exposure to high temperature
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- 作者：Hongxiu Du 杜红秀 ; Jia Wu ; Gaili Liu…
- 关键词：Key wordshigh ; strength concrete ; polypropylene fiber ; high temperature ; infrared thermal imaging technique ; coefficient of thermal conductivity ; compressive strength ratio
- 刊名：Journal of Wuhan University of Technology-Mater. Sci. Ed.
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：32
- 期：1
- 页码：113-120
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Materials Science, general;
- 出版者：Wuhan University of Technology
- ISSN：1993-0437
- 卷排序：32
文摘
Using the detection principle of infrared thermal imaging technique and the detection principle of DRH thermal conductivity tester laboratory, we investigated the infrared thermal image inspection, coefficient of thermal conductivity, apparent density, and compressive strength test on C80 high-strength concrete(HSC) in the presence and absence of polypropylene fibers under completely heated conditions. Only slight damages were detected below 400 °C, whereas more and more severe deterioration events were expected when the temperature was above 500 °C. The results show that the elevated temperature through infrared images generally exhibits an upward trend with increasing temperature, while the coefficient of thermal conductivity and apparent density decrease gradually. Additionally, the addition of polypropylene fibers with appropriate length, diameter, and quantity contributes to the improvement of the high-temperature resistance of HSC.