实时低温条件下花岗岩巴西劈裂试验

Brazilian splitting test of granite under real-time low temperatures

为了探究实时低温条件下花岗岩的抗拉力学性质,在不同实时低温(25、0、-20、-40、-50、-60℃)条件下对干燥和饱和状态下的花岗岩进行了巴西劈裂试验,比较分析不同实时低温和饱和度条件下花岗岩抗拉力学性质的变化规律。结果表明:花岗岩在实时低温条件下破坏模式为脆性破坏;花岗岩的抗拉强度随着温度的降低整体呈上升趋势;饱和度对抗拉强度的影响并不显著,在25、0℃时干燥花岗岩的抗拉强度略大于饱和花岗岩,而在-60℃时饱和花岗岩的抗拉强度相比干燥时略有增大。

To explore the tensile properties of granite under real-time low temperature,Brazilian splitting tests were carried out on dry and saturated granite samples under different real-time low temperatures(25℃,0℃,-20℃,-40℃,-50℃,-60℃),and the variation rules of tensile properties under different conditions were compared and analyzed.The results show that the failure mode of granite under real-time low temperature is brittle failure.The tensile strength increases with the decrease of temperature.Saturation has no significant impact on tensile strength.The tensile strength of dried granite is greater than that of saturated granite at 25℃and 0℃,while the tensile strength of saturated granite is greater at-60℃.