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为了验证Superpave设计体系在甘肃地区道路建设工程中的应用,对Superpave-13沥青混合料目标配合比进行了设计,通过冻融劈裂试验、浸水马歇尔试验、车辙试验和小梁低温弯曲试验检验了其水稳定性、高温稳定性、低温抗裂性能,铺筑试验段对Superpave-13沥青混凝土路面的路用性能进行检测。结果表明:Superpave-13沥青混合料的最佳沥青用量为4.8%;Superpave-13沥青混合料满足水稳定性、高温稳定性及低温抗裂性的要求;通过铺筑的试验段检测,Superpave-13沥青混凝土路面路用性能良好,可提高甘肃地区公路的服务性能。
In order to verify the application of Superpave design system in the road construction project in Gansu, the target mix ratio of Superpave-13 bituminous mixture was designed and tested by freeze-thaw splitting test, immersion Marshall test, rutting test and trabecular low temperature bending test Its water stability, high temperature stability, low temperature crack resistance, pavement test section Superpave-13 asphalt pavement road performance testing. The results show that the optimum asphalt content of Superpave-13 asphalt mixture is 4.8%. The Superpave-13 asphalt mixture meets the requirements of water stability, high temperature stability and low temperature crack resistance. Through the pavement test, Superpave- 13 asphalt pavement with good performance, can improve the service performance of highway in Gansu.