Mao Rui, Gu Xingyu, Jiang Jiwang, Zhang Zhu, Lei Kaiwen
School of Transportation, Southeast University, Nanjing 211189, China.
Materials (Basel). 2025 Jul 1;18(13):3109. doi: 10.3390/ma18133109.
Epoxy Resin System (ERS) steel bridge pavement, which comprises a resin asphalt (RA) base layer and a modified asphalt wearing course, offers cost efficiency and rapid installation. However, the combined effects of traffic loads and environmental conditions pose significant challenges, requiring greater high-temperature stability than conventional pavements. The thermal sensitivity of resin materials and the use of conventional asphalt mixtures may weaken deformation resistance under elevated temperature conditions. This study investigates the thermal field distribution and high-temperature performance of ERS pavements under extreme conditions and explores temperature reduction strategies. A three-dimensional thermal field model developed using finite element analysis software analyzes interactions between the steel box girder and pavement layers. Based on simulation results, wheel tracking and dynamic creep tests confirm the superior performance of the RA05 mixture, with dynamic stability reaching 23,318 cycles/mm at 70 °C and a 2.1-fold improvement in rutting resistance in Stone Mastic Asphalt (SMA)-13 + RA05 composites. Model-driven optimization identifies that enhancing internal airflow within the steel box girder is possible without compromising its structural integrity. The cooling effect is particularly significant when the internal airflow aligns with ambient wind speeds (open-girder configuration). Surface peak temperatures can be reduced by up to 20 °C and high-temperature durations can be shortened by 3-7 h.
环氧树脂体系（ERS）钢桥路面由树脂沥青（RA）基层和改性沥青磨耗层组成，具有成本效益且安装迅速。然而，交通荷载和环境条件的综合作用带来了重大挑战，需要比传统路面更高的高温稳定性。树脂材料的热敏感性和传统沥青混合料的使用可能会削弱高温条件下的抗变形能力。本研究调查了ERS路面在极端条件下的热场分布和高温性能，并探索了降温策略。使用有限元分析软件开发的三维热场模型分析了钢箱梁与路面层之间的相互作用。基于模拟结果，车辙试验和动态蠕变试验证实了RA05混合料的优越性能，在70℃时动态稳定性达到23318次/毫米，在沥青玛蹄脂碎石混合料（SMA）-13+RA05复合材料中抗车辙能力提高了2.1倍。模型驱动的优化表明，在不损害钢箱梁结构完整性的情况下，可以增强其内部气流。当内部气流与环境风速一致（开口梁配置）时，冷却效果尤为显著。表面峰值温度可降低多达20℃，高温持续时间可缩短3-7小时。
