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我国北方沥青混凝土路面在使用过程中,往往出现几毫米宽度不等的不规则的横向裂缝。这种裂缝有的存在于面层;有的是从基层反应到面层,更有甚者从路基开始一直裂到面层。这些裂缝病害根源有的来自路基,有的来自基层,有的来自面层,但不论其根源来自何部位,归结起来有两种原因:一方面在公路修筑时,材质不佳,碾压不好或骨料级配不合理。另一方面则因为公路昼夜温差和冻融等气候环境作用造成的。公路在受雪雨水浸洗时,雪雨水从这种裂缝中渗入路体内,使公路路面的使用能力和年限降
Asphalt pavement in northern China in the course of the use of often appear a few millimeters width irregular horizontal cracks. Some of these cracks exist in the surface layer; some react from the surface layer to the surface layer, and some even start from the subgrade to the surface layer. The root causes of these cracks from the roadbed, some from the grassroots, some from the surface, but no matter where the root of its origin, summed up for two reasons: on the one hand in the highway construction, the poor material, laminated poor Or aggregate gradation is not reasonable. On the other hand, it is caused by climate change such as temperature difference between day and night and freezing and thawing. When the highway is dipped in snow and rain, snow and rain infiltrate into the road body from such a crack, so that the road surface can be used with a limited capacity