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Temperature dependence of thermal diffusivity of OPC and CAC cement paste

机译:OPC和CAC水泥浆的热扩散率与温度的关系

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摘要

Thermal diffusivity of concrete is an important factor that influences the fire resistance of concrete structures. The temperature dependence of thermal diffusivities of ordinary Portland cement (OPC) and calcium aluminate cement (CAC) paste are studied in this paper. First, the mineral compositions of OPC and CAC paste are investigated by X-ray diffraction analysis. Second, the dehydration process and the microstructure of OPC and CAC paste are characterised by thermogravimetric analysis and environmental scanning electron microscopy, respectively. Finally, the thermal diffusivities of OPC and CAC paste at high temperature are measured using the laser flash method.
机译:混凝土的热扩散系数是影响混凝土结构耐火性的重要因素。本文研究了普通硅酸盐水泥(OPC)和铝酸钙水泥(CAC)的热扩散系数与温度的关系。首先,通过X射线衍射分析研究OPC和CAC糊的矿物成分。其次,通过热重分析和环境扫描电子显微镜分别对OPC和CAC糊的脱水过程和微观结构进行了表征。最后,使用激光闪光法测量OPC和CAC糊在高温下的热扩散率。

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