水泥砼桥面沥青铺装结构性能研究

Study on Structural Performance of Asphalt Pavement on Cement Concrete Bridge Deck

摘要: 本文依托来宾至马山高速公路混凝土桥沥青铺装，对混凝土桥沥青铺装结构组合方案性能进行研究。论文采用室内小型加速加载试验，对沥青铺装结构的抗滑性能和抗车辙性能进行比较。试验时采用水浴循环系统模拟广西地区的高温湿热环境，对三种铺装结构组合型式进行加载，在加载过程中测量试件的车辙深度和摆值的变化情况，分析研究试验结构的抗滑性能及抗车辙性能随荷载作用次数增加与环境温度变化而变化的规律。试验结果表明，三种结构型式在抗车辙性能方面为等厚结构 > 倒装结构 > 正装结构；表面层的沥青混合料级配类型和最大公称粒径对铺装结构的抗滑性能有较大的影响。

Abstract: This paper relies on the asphalt pavement of the concrete bridge of Laibin-Mashan Expressway to study the performance of the asphalt bridge-paving combination scheme of concrete bridges. The paper adopts a small accelerating load test in the interior to compare the anti-slip performance and anti-rutting performance of the asphalt pavement structure. During the test, a water bath cir-culation system was used to simulate the high-temperature hot and humid environment in Guangxi, and three types of paving structure combinations were loaded. During the loading process, the changes in the rutting depth and the pendulum value of the test specimens were measured, and the anti-sliding performance of the test structures was analyzed. And the law of anti-rutting performance changes with the increase of the number of loads and the change of ambient temper-ature. The test results show that the three types of structures are equal thickness structure > flip structure > face structure in terms of anti-rutting performance; the asphalt mixture gradation type and maximum nominal particle size of the surface layer have greater anti-sliding performance on the paving structure Impact.