【摘要】 桥面铺装层采用的结构和材料对其路用性能影响较为显著，为提供更适宜寒区环境的铺装层设计，基于层位功能设计原理对铺装层的材料进行分层改性优化。首先，利用层位功能的划分对表面功能层与整体功能层进行材料拟定，并分别选取木质纤维素和聚酯纤维改性。其次，通过路用性能试验确定聚酯纤维的掺量。最后，确定层位材料的选择及合理改性方式。结果表明：表面功能层与整体功能层均选用同高黏高弹改性沥青并分别木质纤维素和聚酯纤维改性方式，可以避免层体材料温缩系数不同，使其铺装层与桥梁结构的温度变形协调，能有效提高沥青桥面铺装层的路用性能。此外，满足工程经济要求下，当聚酯纤维掺量为混合料总质量的1%时，其制备的沥青混合料高温性能提高7%、低温性能提高23%、水稳定性能提高5%。更多还原

【Abstract】 The structure and materials used in bridge deck pavement layers significantly impact their road performance. To design a pavement layer more suitable for cold regions, the layered modification of pavement materials was optimized based on the principle of layer function design. Firstly, materials for the surface functional layer and overall functional layer were selected using the layer function division, with lignocellulose and polyester fibers as modifiers, respectively. Secondly, the appropriate content of polyester fibers was determined through road performance tests. Finally, the choice of layered materials and appropriate modification methods were established. The results indicate that both the surface functional layer and the overall functional layer should use the same high-viscosity, high-elasticity modified asphalt, with lignocellulose and polyester fibers as modifiers, respectively. This approach avoids differences in thermal contraction coefficients of the layered materials, ensuring coordinated thermal deformation between the pavement layer and the bridge structure, thereby effectively improving the road performance of the asphalt bridge deck pavement. Furthermore, under engineering economic requirements, when the polyester fiber content is 1% of the total mixture mass, the prepared asphalt mixture’s high-temperature performance increases by 7%, low-temperature performance by 23%, and water stability by 5%.更多还原