Cold-patching materials are extensively applied to the repairing of potholes and localized distresses involving roadway maintenance operations. Considering that there has been only few research on the performance amelioration of cold-mixing and cold-patching materials concerning the characteristics of slow strength formation, low bonding and high-temperature performance, this study proposed a waterborne unsaturated polyester concrete (WUPC) cold-patching material for potholes, and determined the composition proportion and preparation process based on the Marshall design procedure as well as the contrastive analysis on the experimental results in relation to Marshall test, cohesion test, rutting test, low temperature bending test, moisture-damage resistance test, ultraviolet radiation aging test and anti-fatigue property test. The results demonstrated that WUPC with the optimal resin-stone ratio possessed the excellent deformation resistance, moisture susceptibility and fatigue resistance. With the purpose of guaranteeing the construction reliability and standard requirement, the allowable reserved time and traffic opening time were determined as 3.5–4 h and 2 h, respectively. The study proved the feasibility and advantages for the investigation utilizing WUPC as cold-patching materials in bituminous pavement maintenance.

补冷材料广泛用于修补涉及道路维护作业的坑洞和局部故障。考虑到冷拌和冷补材料在强度形成慢、粘结性低和高温性能方面的研究较少，本研究提出了一种水性不饱和聚酯混凝土（WUPC）冷拌和冷补材料。根据马歇尔设计程序以及马歇尔试验、内聚力试验、车辙试验、低温弯曲试验、抗湿损试验结果对比分析，确定了坑洞修补材料的组成比例和制备工艺测试，紫外线辐射老化测试和抗疲劳性能测试。结果表明，具有最佳树脂石比的WUPC具有优异的抗变形性、湿敏性和抗疲劳性。为保证施工可靠性和标准要求，允许预留时间和通车时间分别确定为3.5~4 h和2 h。该研究证明了利用WUPC作为冷补材料进行沥青路面养护研究的可行性和优势。