破碎卵石沥青混凝土在西藏高海拔地区的应用研究

Study on Application of Crushed Pebble Asphalt Concrete in High Altitude Area of Tibet

依托西藏林芝至米林机场专用公路新改建工程B合同段,将当地河滩卵石破碎后应用于沥青道路面层,研究其在该地区的适用性。该项目中,上面层采用AC-13C型沥青混合料,中面层采用AC-20F型混合料,下面层采用AC-25F型混合料,分别对其进行配合比设计和路用性能验证。试验结果表明,破碎卵石集料能完全满足该地区沥青路面的路用性能。此外,破碎卵石应用于沥青路面面层还具有较高的社会、经济和环境效益。

Based on the contracted section B of the new reconstruction project of accommodation highway for the airport from Nyingchi to Millin of Tibet, the pebble of local river shoal is applied to the asphalt pavement after crushed. The article studies its applicability in this area. In this project, the AC-13 C asphalt mixture is used for the upper layer, the AC-20 F mixture is used for the middle layer and the AC-25 F mixture is used for the lower layer. The mixing ratio designs and the pavement performances of these mixtures are experimented.The experimental results show that the crushed pebble aggregate can completely satisfy the asphalt pavement performance of this area. In addition, the application of crushed pebble in the asphalt pavement surface has the higher social, economic and environmental benefits.