高黏改性乳化沥青粘结层力学性能研究

Study on Mechanical Properties of High-viscous Modified Emulsified Asphalt Bond Layer

相比于传统磨耗层技术,超薄磨耗层技术具备施工便捷、经济耐久、平顺静音等优势,目前被广泛应用于公路预防性养护工程和道路品质提升工程当中;但因为其厚度较薄,在车辆荷载作用下发生层间滑移的风险相对较高,故对其黏层体系的性能和耐久性提出了更高的要求。针对这一问题,选取三种黏层材料——高黏改性乳化沥青、Nova-B改性乳化沥青、PC-3乳化沥青和2类下承层界面——GAC-16沥青混凝土和水泥混凝土面板作为研究对象,通过制备复合式超薄试件并开展层间剪切疲劳试验和层间拉拔疲劳试验,结合实际工程应用效果验证,研究黏层材料种类、温度和荷载对黏层的力学性能的影响。

Compared with the traditional wear layer technology,the ultra-thin wear layer technology has the advantages such as convenient construction,economic durability,smooth and quiet,which is widely used in highway preventive maintenance projects and road quality upgrading projects now.However,because of its thin thickness,the risk of inter-layer slip under the vehicle load is relatively high.Therefore,the higher requirements are put forward for the performance and durability of its viscous layer system.To solve this problem,three kinds of viscous layer materials,such as high-viscous modified emulsified asphalt,Nova-B modified emulsified asphalt and PC-3 emulsified asphalt,and two types of sub-bearing layer interface,such as GAC-16 asphalt concrete and cement concrete panels are selected as the research objects.The composite ultra-thin specimens are prepared,and the interlayer shear fatigue tests and interlayer drawing fatigue tests are carried out.Combined with the actual engineering application effect verification,the influence of the type,temperature and load of bonding layer material on the mechanical properties is studied.