Zeng Qing-Wei, Gao Pei-Wei, Xu Yang-Fu, Dong Guo-Qing, Chen Man-Man, Zhao Jing-Wei, Jin Guang-Lai
College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
Jiangxi Changtong Highway Co., Ltd., Nanchang 330025, China.
Materials (Basel). 2021 Aug 25;14(17):4828. doi: 10.3390/ma14174828.
To improve the safety of orthotropic steel bridge decks and the construction efficiency of bridge deck pavement by enhancing the performance of pavement materials, a new-generation, high-performance cold-mix resin was prepared by carrying out the combination of micro-characteristic analysis and performance test. Meanwhile, the pavement performance and fatigue performance of high-performance cold-mix resin mixtures and hot-mix epoxy saphalt mixtures as a control group were studied experimentally. The results show that different kinds of epoxy resins show bisphenol structure in essence. The curing exothermic peak temperature of the cold-mix resin increases with the heating rate. Both the specific heat capacity (△) of cold-mix resin and cold-mix resin asphalts exhibit a sudden change between -20 °C and 40 °C. In resin asphalt mixtures, cold-mix resin forms the network structure skeleton whereas the asphalt distributed in the form of tiny particles. The dosage of respective component has a significant effect on the tensile strength and elongation at break of cold-mix resin. Compared with hot-mix epoxy asphalt mixtures, cold-mix resin mixtures exhibit comparable water stability and high and low-temperature performance, as well as greater fatigue life.
为了通过提高路面材料性能来提升正交异性钢桥面板的安全性和桥面铺装施工效率，通过开展微观特性分析与性能测试相结合的方式制备了新一代高性能冷拌树脂。同时，对高性能冷拌树脂混合料以及作为对照组的热拌环氧沥青混合料的路面性能和疲劳性能进行了试验研究。结果表明，不同种类的环氧树脂本质上均呈现双酚结构。冷拌树脂的固化放热峰值温度随升温速率的增加而升高。冷拌树脂及其沥青的比热容（△）在-20℃至40℃之间均出现突变。在树脂沥青混合料中，冷拌树脂形成网络结构骨架，而沥青以微小颗粒的形式分布。各组分用量对冷拌树脂的拉伸强度和断裂伸长率有显著影响。与热拌环氧沥青混合料相比，冷拌树脂混合料具有相当的水稳定性、高低温性能以及更长的疲劳寿命。
