基于桥面铺装的多种沥青混合料性能研究

Research on Performances of Various Asphalt Mixtures Based on Bridge Deck Pavement

摘要:

桥面铺装是桥梁建造的重要组成部分，铺装材料的选择将直接影响桥梁的服役寿命。旨在研究适用于桥面铺装的高性能长寿命沥青混合料，分别采用SBS改性沥青、高黏改性沥青、高弹改性沥青、重载交通改性沥青以及浇筑式沥青五种沥青，基于AC-10、AC-13、AC-20、GA-10、SMA-10以及SMA-13六种级配，进行沥青混合料的路用性能试验。经试验表明：重载类沥青混合料的油石比低于高黏、高弹以及SBS改性沥青混合料；级配SMA类优于AC类，GA浇筑式沥青混合料高、低温性能差异较大；车辙试验显示高黏类沥青混合料性能最优；低温弯曲试验显示高弹类沥青混合料性能最优；浸水马歇尔试验、冻融劈裂试验、单轴贯入试验、劈裂试验、动态模量试验均显示重载类沥青混合料性能最优。

Abstract:

Bridge deck pavement is an important part of bridge construction, and the selection of pavement materials will directly affect the service life of bridge. In order to study the high-performance long service life asphalt mixtures suitable for bridge deck pavement, five kinds of SBS modified asphalt, high-viscosity modified asphalt, high-elastic modified asphalt, heavy-load traffic modified asphalt and poured asphalt are used. Based on six gradations of AC-10, AC-13, AC-20, GA-10, SMA-10 and SMA-13, the pavement performance tests of asphalt mixture are carried out. The tests show that the asphalt-aggregate ratio of heavy-load asphalt mixture is lower than that of high viscosity, high elasticity and SBS modified asphalt mixtures. The graduation SMA class is better than AC class. The high-temperature and low-temperature performances of GA poured asphalt mixtures are very different. The rutting test shows that the performance of high-viscosity asphalt mixture is the best. The low-temperature bending test shows that the performance of high-elastic asphalt mixture is the best. The immersion Marshall Test, freeze-thaw split test, uniaxial penetration test, split test and dynamic modulus test all show that the performance of heavy-load asphalt mixture is the best.