高温对C80高性能混凝土轴压强度及红外热像的影响  

Effect of High Temperature on Axial Compressive Strength and Infrared Thermal Image of C80 High Performance Concrete

作　　者：吴振戌 杜红秀[1] WU Zhenxu;DU Hongxiu(School of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]太原理工大学土木工程学院,太原030024

出　　处：《硅酸盐通报》2020年第5期1473-1477,1482,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51278325)。

摘　　要：为研究高温对C80高性能混凝土轴压强度及红外热像的影响,对不掺和掺0.2%PP纤维C80高性能混凝土(HPC和PPHPC)进行模拟高温试验,测试其高温后的轴压强度、红外温升,并分析其相关关系以及受火温度对各指标的影响。结果表明,随受火温度升高,C80高性能混凝土轴压强度总体呈下降趋势,PPHPC轴压强度较HPC轴压强度略高,表明掺加PP纤维能够改善其高温后的力学性能,红外温升随温度上升呈升高趋势,相同受火温度,红外温升随测距的增大而降低。In order to study the influence of high temperature on the axial compressive strength and infrared thermal image of C80 high performance concrete,the high temperature test was conducted to test the axial compressive strength and infrared temperature rise of C80 high performance concrete(HPC and PPHPC)without or with 0.2%PP fiber after high temperature,and the correlation and influence of fire temperature on each index were analyzed.The results show that the axial compressive strength of C80 high performance concrete decreases with the increasing of fire temperature.The axial compressive strength of PPHPC is slightly higher than that of HPC,indicating that PP fiber can improve its mechanical properties at high temperature.The infrared temperature rise increases with the rise of temperature.At the same temperature,the infrared temperature rise decreases with the increasing of distance measurement.

关 键 词：C80高性能混凝土 轴压强度 PP纤维 红外热像 

分 类 号：TU528[建筑科学—建筑技术科学]