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Analysis of High-Friction Surface Texture with Respect to Friction and Wear

机译：关于摩擦和磨损的高摩擦表面纹理分析

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High Friction Surfaces (HFS) are applied to increase friction capacity on critical roadway sections, such as horizontal curves. HFS friction deterioration on these sections is a safety concern. This study deals with characterization of the aggregate loss, one of the main failure mechanisms of HFS, using texture parameters to study its relationship with friction. Tests are conducted on selected HFS spots with different aggregate loss severity levels at the National Center for Asphalt Technology (NCAT) Test Track. Friction tests are performed using a Dynamic Friction Tester (DFT). The surface texture is measured by means of a high-resolution 3D pavement scanning system (0.025 mm vertical resolution). Texture data are processed and analyzed by means of the MountainsMap software. The correlations between the DFT friction coefficient and the texture parameters confirm the impact of change in aggregates’ characteristics (including height, shape, and material volume) on friction. A novel approach to detect the HFS friction coefficient transition based on aggregate loss, inspired by previous works on the tribology of coatings, is proposed. Using the proposed approach, preliminary outcomes show it is possible to observe the rapid friction coefficient transition, similar to observations at NCAT. Perspectives for future research are presented and discussed.
机译：施加高摩擦表面（HFS）以增加临界道路部分的摩擦能力，例如水平曲线。 HFS对这些部分的摩擦恶化是安全问题。本研究涉及聚集损失的表征，使用纹理参数来研究其与摩擦关系的主要失败机制之一。测试在选定的HFS斑点上进行，在国家沥青技术中心（NCAT）测试轨道中具有不同的聚合损失严重程度。使用动态摩擦测试仪（DFT）进行摩擦测试。通过高分辨率3D路面扫描系统（0.025mm垂直分辨率）测量表面纹理。通过MountainMap软件处理和分析纹理数据。 DFT摩擦系数与纹理参数之间的相关性证实了聚集体的变化（包括高度，形状和材料体积）对摩擦的影响。提出了一种基于总损失的基于总损失的HFS摩擦系数转变的新方法，由先前的涂层摩擦学的影响。使用所提出的方法，初步结果表明，可以观察到快速摩擦系数转变，类似于NCAT的观察。提出和讨论了未来研究的观点。

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