沥青混合料级配离析对路面使用性能有重要影响。文章基于数字图像处理技术,直接针对混合料中集料的分布状态,将各档集料对X轴、Y轴的静矩作为离析评价指标,选择了工程中常见的6种典型级配,定量地评价沥青混合料的离析。研究结果表明:随着级配中最大公称粒径的增大,沥青混合料的离析明显增强;对于最大公称粒径相同的级配,SMA级配类型有着更好的均匀性。 Asphalt mixture gradation has important influence on pavement performance. Based on the digital image processing technology, the distribution of the aggregates in the mixture was directly studied. The static moments of the X-axis and the Y-axis of each file were taken as the evaluation indexes. Six kinds of typical gradations were selected, Evaluation of asphalt mixture segregation. The results show that the segregation of asphalt mixture is obviously enhanced with the increase of the maximum nominal particle size in gradation, and the SMA gradation type has better uniformity for the same maximum particle size.