钢桥面环氧沥青铺装施工及路用性能分析

Construction and Pavement Performance Analysis of Epoxy Asphalt Paving on Steel Bridge Decks

摘要:

为优化钢桥面双层环氧沥青铺装施工工艺并提升路用性能，开展了系统性现场试验与性能检测研究。通过对施工准备、材料性能与铺装关键工艺的分析，明确了防水黏结层及环氧沥青混合料的关键控制指标。在实测中，防水黏结层拉拔强度提升约15%，各结构层钻芯样品未发现脱层或断裂，界面粘结稳定可靠；面层渗水系数均为0 mL/min，显著优于设计标准（50 mL/min），摩擦系数远高于45 BPN设计值，构造深度为0.68～0.71 mm，满足不小于0.60 mm要求；6.3%油石比区域空隙率最低为1.2%，压实度合格率达100%。结果表明，该铺装体系在结构完整性、抗滑性及密实度等方面均符合规范要求，验证了所用施工工艺的适用性与有效性，为特大跨径钢桥面铺装工程提供技术支撑。

Abstract:

To optimize the construction process of double-layer epoxy asphalt paving on steel bridge decks and enhance its pavement performance, the systematic field test and performance detection study are carried out. By analyzing the construction preparation, material properties and key paving techniques, the critical control indexes for the waterproof bonding layer and epoxy asphalt mixture are identified. In the field tests, the pulling strength of the waterproof bonding layer is improved by approximately 15%, and no delamination or fractures are observed in core samples from various structural layers, indicating stable and reliable interface bonding. The water permeability coefficient of surface layer is 0 mL/min, significantly better than the design standard (50 mL/min). The friction coefficient is much higher than 45 BPN design value. And the texture depth is 0.68~0.71 mm, meeting the requirement of not less than 0.60 mm. The void ratio in the 6.3% asphalt-to-aggregate ratio area is the lowest at 1.2%, and the qualified rate of compaction degree reaches 100%. The results show that the paving system meets the specification requirements in terms of structural integrity, skid resistance and compaction degree, validating the applicability and effectiveness of the construction process, and providing the technical support for long-span steel bridge deck paving projects.