沥青混合料车辙试验中粗颗粒运动轨迹的分析

对沥青路面车辙问题的研究一直是道路工程领域的热点之一.文章应用数字图像处理技术,分别对AC-13C沥青混合料试件的自动路面分析仪(APA)车辙试验原始图像,以及加载500次、1000次、2000次、4000次和6000次时的截面图像中粗颗粒的运动轨迹进行了分析.结果表明:应用数字图像处理技术能够观测粗颗粒的运动情况,通过定义转角θ和位移L,以及Δ和α两个统计量,能够描述车辙试验过程中各个加载阶段粗颗粒的复杂运动过程并将其量化.

Analysis of Movement Track of Coarse Particles During Rutting Test of Asphalt Mixture

The rutting of asphalt pavement is always one of the research focuses in road engineering.In this paper, the original image of AC-13C asphalt mixture during the APA rutting test and the corresponding sectional images after the loading respectively for 500, 1000, 2000, 4000 and 6000 times were acquired, and the movement track of coarse particles was analyzed according to the images.The results show that the digital image processing technology has great capability in movement tracking of coarse particles, and that, by defining the rotation angle θ, the displacement L and the statistics Δ and α, the complicated particle movement in different loading stages during the APA rutting test can be well described and quantified.