摘要
以C60混凝土为材料制作试块,将其在指定升温曲线下进行过火试验,并用热电偶测量试块内部的温度场。过火试验结束后,在混凝土试块的不同位置取样进行扫描电子显微镜观测和XRD图谱分析,推测试块取样位置的过火最高温度。将推测温度同热电偶实测的温度进行对比,吻合较好。这证明火灾后通过对混凝土梁、柱、墙等构件取样进行扫描电子显微镜观测和XRD分析可以得知其过火的最高温度,从而为火灾后评估工作提供可靠的数据支持。
The specimens are made with C60 concrete and tested according to the specified temperature curve. The thermocouples are used to measure the temperature field of the internal specimens. After fire test, the samples derived from different locations of the concrete specimens are observed in the scanning electron microscope （SEM） and analyzed by X-ray diffraction （XRD） to extrapolate maximum temperature of the samples. The temperature extrapolated by SEM and XRD is in good agreement with the temperature measured by thermocouples. This proves it is feasible that the maximum temperature of the concrete beam, column, wall and other components after fire extrapolated by SEM and XRD. The paper can provide reliable data to support the post-disaster assessment work.
出处
《建筑科学》
北大核心
2013年第3期50-53,共4页
Building Science
基金
建筑安全监测北京市工程技术研究中心项目资助
北京市工程结构与新材料工程研究中心项目资助
北京市城市交通基础设施建设工程技术研究中心项目资助
关键词
高强混凝土
过火温度
微观结构
high strength concrete
fire temperature
microstructure
