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对经历不同加热温度和不同恒温时间工况下C60高强混凝土的力学性能进行试验研究,结果表明:随着加热温度的升高和恒温时间的增长,混凝土的抗压强度总体呈现逐渐减小的趋势。利用超声、扫描电子显微镜、X射线衍射、汞压力测孔及显微硬度检测等综合手段,从不同角度研究材料经历不同温度及不同恒温时间后的微观结构变化,对高温过程中高强混凝土材料的物理化学变化以及由此引起的微观结构变化进行了分析。
The mechanical properties of C60 high-strength concrete subjected to different heating temperatures and different constant temperature conditions were studied. The results show that with the increase of heating temperature and constant temperature time, the compressive strength of concrete generally shows a decreasing trend . The microstructure changes of materials under different temperatures and different constant temperature were studied by means of ultrasonic, scanning electron microscopy, X-ray diffraction, mercury pressure measurement and microhardness testing. The influences of high temperature on the properties of high-strength concrete Physical and chemical changes and the resulting microstructure changes were analyzed.