Abstract：In order to study the creep damage of asphalt mixture from the microscopic point of view, the trajectory of coarse aggregate in asphalt mixture with two kinds of gradations before and after the creep shear test was analyzed using the digital image processing techniques. The influence of particle composition on the shear performance of asphalt mixture was also comparatively studied. To describe the translational trajectory of particle, the angle θ and the displacement amount L were defined. In addition, the major axis direction of coarse particle was taken as an index to evaluate the rotation trajectory of particle, and two statistics Δ and a were introduced to describe the direction changes of major axis. The results showed that both the corner and the displacement amount at different layer levels for two kinds of gradations may change greatly after the shear creep, the major axis direction is also very uneven, and the shear creep performance of SMA-13 is greater than that of AC-13.
谢军 袁畅. 蠕变剪切试验前后粗集料运动轨迹的数字图像分析[J]. 土木工程学报, 2016, 49(9): 123-128.
Xie Jun Yuan Chang. Digital image analysis on the trajectory of coarse aggregate before and after creep shear test#br#. 土木工程学报, 2016, 49(9): 123-128.
