Zhang Chen, Zeng Lihao, Wang Huimin, Qu Xin
Guangxi Transportation Science and Technology Group Co., Ltd., Nanning, Guangxi, China.
Xi'an Aeronautical Institute, Xi'an, Shaanxi, China.
PLoS One. 2024 Dec 26;19(12):e0308721. doi: 10.1371/journal.pone.0308721. eCollection 2024.
This study aimed to investigate the influence of different coarse aggregate mineral compositions on the skid resistance performance of asphalt pavement. The imprint method was utilized to assess the contact probability between various graded asphalt surface aggregates and tires. Additionally, macroscopic adhesive friction coefficients between polished surfaces of three types of rock slabs (basalt, limestone, granite) and rubber were determined using a pendulum friction tester. Molecular dynamics simulations were employed to model the main aggregate minerals and rubber, and a "sandwich" type constrained shear model was constructed to evaluate micro-scale adhesive friction coefficients. Results indicated a 40% contact probability between aggregate and tire in a unit area of the road surface, highlighting the importance of studying adhesive friction between minerals and rubber. Macroscopically, basalt exhibited the highest adhesive friction coefficient, followed by limestone and granite. At the molecular level, feldspar showed the highest micro-scale friction coefficient with rubber, while quartz exhibited the lowest. The micro-scale adhesive friction coefficients correlated well with the macroscopic findings (correlation coefficient of 0.81), providing theoretical support for optimizing coarse aggregate selection to enhance skid resistance in road applications.
本研究旨在探究不同粗集料矿物成分对沥青路面抗滑性能的影响。采用印记法评估不同级配沥青表面集料与轮胎之间的接触概率。此外，使用摆式摩擦测试仪测定了三种岩石板（玄武岩、石灰岩、花岗岩）抛光表面与橡胶之间的宏观粘附摩擦系数。采用分子动力学模拟对主要集料矿物和橡胶进行建模，并构建了“三明治”型约束剪切模型来评估微观尺度的粘附摩擦系数。结果表明，在路面单位面积内集料与轮胎的接触概率为40%，凸显了研究矿物与橡胶之间粘附摩擦的重要性。宏观上，玄武岩的粘附摩擦系数最高，其次是石灰岩和花岗岩。在分子水平上，长石与橡胶的微观尺度摩擦系数最高，而石英最低。微观尺度的粘附摩擦系数与宏观结果具有良好的相关性（相关系数为0.81），为优化粗集料选择以提高道路应用中的抗滑性能提供了理论支持。
