高温下C65混凝土力学性能试验研究

为研究高强混凝土的抗高温性能,研究了C65混凝土在高温下的力学性能,利用高温下混凝土加载试验设备,对C65混凝土分别进行了常温20 ℃、300 ℃、400 ℃、500 ℃、600 ℃、800 ℃高温试验,并对各温度下的高强混凝土进行了单轴压力学性能试验。分析了高温后混凝土外观特征,测得了高温下混凝土的单轴抗压强度,系统地分析了高温对高强混凝土力学性能的影响。结论表明:随温度的提高,高强混凝土的单轴抗压强度总体呈逐渐降低的趋势,并具有一定规律性。这些结论可以为高强混凝土结构抗火性能的研究提供理论依据。

Experimental Study on Mechanical Property of C65 Concrete at High Temperature

In order to study the high temperature resistance of the high-strength concrete, the research studied the mechanical property of the C65 concrete with high temperature through the concrete loading equipment. The C65 concrete was tested under the temperature of 20℃, 300℃, 400℃, 500℃, 600℃, and 800℃, and the uniaxial compressive performance under these temperatures was experimented respectively. The study analyzed the appearance characteristics after the high temperature test; the uniaxial compressive strength was test at the same time. Finally the analysis of high temperature influence on the mechanical property was displayed. The conclusion shows that with temperature increasing, the uniaxial compressive performance of the high-strength concrete decreases overall, and it has certain regularity. This conclusion provides scientific basis for the study on the high temperature resistance performance of the high-strength concrete.