钢桥面铺装现场实测性能对比研究

Comparative Study on in-situ Measured Performance of Steel Deck Pavement

现有桥面铺装相关研究在室内实验性能方面较多,在实际使用性能方面研究较为匮乏。采用路面使用性能指数评价与室内试验相结合方法对环氧沥青铺装和复合式铺装(沥青玛蹄脂+浇注式沥青混凝土)两种铺装层的现场使用性能进行对比分析。路面使用性能检测结果表明:两种铺装的国际平整度指数与横向力系数基本相当,复合式铺装的车辙深度大于环氧沥青铺装。间接拉伸动态模量试验表明:铺装层动态模量与加载频率成正比,与温度成反比,环氧沥青铺装动态模量大于复合式铺装。GPC试验结果表明:环氧沥青铺装病害区与无病害区LMS比值差异显著,复合式铺装则不明显;集料筛分结果显示推移拥包区浇注式混凝土细集料比例较无病害区高50%以上。两种铺装的病害各有特点,但都与层间结合不良或失效有关。

The existing research on deck pavement is more in laboratory- experimental performance. And there is a lack of research on practical performance. The field use performance of epoxy- asphalt pavement and composite pavement （asphalt mastic ＋ east asphalt concrete） was compared and analyzed by using pavement performance index evaluation and laboratory test. The test re sults of pavement performance show that the international roughness index of the two kinds of pavement is basically the same as the transverse force coefficient, and the rutting depth of the composite pavement is greater than that of the epoxy asphalt pavement. Indirect tensile dynamic modulus test shows that the dynamie modulus of pavement is proportional to loading frequency and inversely proportional to temperature. The dynamic modulus of epoxy asphalt pavement is larger than that of composite pavement. GPC test results show that there is a significant difference in the ratio of LMS between the diseased and non-diseased areas of epoxy asphalt pavement, but not in the composite pavement. The results of aggregate screening show that the proportion of east con- crete fine aggregate in the occupied area is more than 50% higher than that in the disease-free area. The diseases of the two pavements have their own characteristics, but they are all related to the poor combination or failure of the layers.