沥青混凝土薄层罩面路用性能及施工技术研究

Research on Pavement Performance and Construction Technology of Ultra-thin Asphalt Surfacing

为加快推广沥青混凝土薄层罩面的工程应用,借助浸水马歇尔试验、冻融劈裂试验、高温车辙试验以及层间剪切试验,对沥青混凝土薄层罩面的路用性能进行了系统研究,同时结合实际工程,探讨沥青混凝土薄层罩面的施工技术。结果表明:沥青混凝土薄层罩面的马歇尔稳定度、残留稳定度、劈裂强度比、冻融循环劈裂强度比均满足规范要求;沥青混凝土薄层罩面的应用大幅度提升了高速公路的营运服务能力。

In order to promote the application of ultra-thin asphalt surfacing, Marshall immersion test, freeze-thaw splitting test, rutting test at high temperature and interlayer shear strength test were carried out to study the pavement performance of ultra-thin asphalt surfacing. Combined with practical projects, the construction technology of ultra-thin asphalt surfacing was discussed. The results show that the Marshall stability, residual stability, ratio of splitting strength and the ratio of retained tensile strength after ten cycles of freezing and thawing of the ultra-thin asphalt surfacing all meet the requirements of specifications, and the service capacity of highway that adopts the ultra-thin asphalt surfacing is greatly enhanced.