Xiang Hao, Wang Zhengxing, Deng Mingyang, Tan Silu, Liang Haoning
College of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China.
Key Laboratory of Engineering Materials of Ministry of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100038, China.
Materials (Basel). 2025 Feb 23;18(5):981. doi: 10.3390/ma18050981.
To investigate the adhesion properties of asphalt binder-aggregate interfaces, contact angle tests were performed on base, aged, and SBS# asphalt with limestone and basalt aggregates. A molecular dynamics simulation model was established to analyze interfacial adhesion characteristics. The results indicate good consistency between the experimental and molecular dynamics simulation findings. SBS# asphalt exhibited superior surface free energy and adhesion properties compared with base asphalt, whereas aging reduced the adhesion performance. The interfacial energy between the asphalt and aggregates is closely related to their molecular compositions. When moisture penetrates the asphalt mixture, the interfacial energy between limestone and asphalt significantly increases, compared with that of basalt, with SBS# asphalt exhibiting stronger adhesion than base asphalt. The modifier enhanced the adhesion between the asphalt and aggregates, thereby providing resistance to moisture damage. The findings of this study possess referential value for the selection, modification, and performance optimization of asphalt pavement materials.
为研究沥青结合料与集料界面的粘附性能，对基质沥青、老化沥青和SBS#沥青与石灰岩和玄武岩集料进行了接触角试验。建立了分子动力学模拟模型来分析界面粘附特性。结果表明，实验结果与分子动力学模拟结果具有良好的一致性。与基质沥青相比，SBS#沥青表现出更高的表面自由能和粘附性能，而老化会降低粘附性能。沥青与集料之间的界面能与其分子组成密切相关。当水分渗入沥青混合料时，与玄武岩相比，石灰岩与沥青之间的界面能显著增加，SBS#沥青比基质沥青表现出更强的粘附力。改性剂增强了沥青与集料之间的粘附力，从而提供了抗水损害能力。本研究结果对沥青路面材料的选择、改性和性能优化具有参考价值。
