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为了改善钢桥面环氧沥青铺装层(EAP)的表面性能,提出了一种阳离子乳化沥青雾封层与环氧沥青碎石封层(ECS)复合的封层结构,并结合室内试验对复合封层结构进行设计和性能评价.首先,提出了钢桥面环氧沥青铺装层用碎石封层的评价指标与相应研究方法.其次,为了最小化封层结构的失效概率,采用小型加速加载设备MMLS3和短期老化试验对养护期内最坏路面状况进行模拟.最后,通过试验分析确定复合封层结构的设计参数,并对所设计的复合封层结构进行性能评价.结果表明:所提出的路面状况模拟方法是有效的,且作用在EAP车辙板上最大的荷载重复次数约为925 300次.此外,复合封层结构可以提供一个密实表面,并且具有足够的抗滑性能、集料沥青间的黏结性能及层间抗剪切性能.
In order to improve the surface properties of epoxy asphalt pavement (EAP) on steel bridge deck, a seal structure of cation emulsified asphalt mist sealant layer and epoxy asphalt gravel seal (ECS) composite was proposed. Combined with indoor test Composite seal structure design and performance evaluation.Firstly, the evaluation index and corresponding research methods of the gravel seal layer of epoxy asphalt pavement with steel bridge deck are proposed.Secondly, in order to minimize the failure probability of the seal structure, Accelerated loading equipment MMLS3 and short-term aging test were used to simulate the worst pavement condition during the curing period.Finally, the design parameters of the composite seal structure were determined through experimental analysis and the performance of the composite seal structure was evaluated.The results show that: The proposed pavement condition simulation method is effective and the maximum number of load repetitions acting on the EAP track plate is approximately 925 300. In addition, the composite seal structure can provide a dense surface with sufficient anti-slip properties, aggregate Asphalt bonding properties and shear resistance between layers.