论文部分内容阅读
目前,有关沥青混合料强度特性的研究中存在着强度参数取值存在任意性的问题,沥青混合料弯曲试验、直接拉伸试验条件的受力状态不同,所得到的强度和刚度指标迥然不同,却很少有人研究这些破坏现象之间的内在联系与规律。针对这一问题,该文对AC-13沥青混合料进行不同加载速率的弯拉试验和直接拉伸试验,在分析沥青混合料的破坏特征及各种力学参数的基础上,认为实测破坏拉应变能反映材料的局部抗拉性能,是一种能较好表征沥青混合料破坏本质的力学参数。
At present, there are some problems in the study of the strength properties of asphalt mixture, such as the strength parameter is arbitrary, the bending strength of the asphalt mixture and the direct tensile test conditions are different, the strength and stiffness index obtained are very different, Few people have studied the internal relations and laws between these destruction phenomena. In response to this problem, the AC-13 asphalt mixture under different loading rates of the bending test and direct tensile test, based on the analysis of the destruction characteristics of asphalt mixture and various mechanical parameters, that the measured tensile strain It can reflect the local tensile properties of materials and is a kind of mechanical parameter that can better characterize the destruction of asphalt mixture.