高速公路路面早期损坏的一个重要原因是路面的不均匀性,而沥青混合料的离析问题是造成路面的不均匀性的主要原因,是降低路面使用性能的顽症。混合料发生离析时,粗集料和细集料分别集中于铺筑层的某些位置,使沥青混凝土不均匀、配合比级配与原设计不符,导致路面产生一些破坏,缩短路面 An important cause of early damage of expressway pavement is the unevenness of the pavement. The segregation of asphalt mixture is the main reason causing the unevenness of the pavement and the persistent problem of reducing the serviceability of the pavement. When the mixture is segregated, the coarse aggregates and the fine aggregates are respectively concentrated on some positions of the paving layer to make the asphalt concrete inhomogeneous, and the gradation of the mix ratio is inconsistent with the original design, resulting in some damage to the pavement and shortening the pavement