Zhao Hua, Wei Fulu, Wang Ce, Li Shuo, Shan Jie
School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China.
School of Construction Management Technology, Purdue University, West Lafayette, IN 47907, USA.
Materials (Basel). 2021 Nov 15;14(22):6895. doi: 10.3390/ma14226895.
Surface friction is currently the most common metric for evaluating the performance of high friction surface treatment (HFST). However, friction test methods such as the locked wheel skid tester (LWST) commonly provide a spot measurement. Large variations may arise in the LWST testing on curves. Based on 21 actual HFST projects, a study was performed to use a macrotexture metric, i.e., the mean profile depth (MPD) to evaluate HFST's performance and improve its quality control (QC)/quality assurance (QA) procedures. The material properties were presented to understand the aspects of HFST. The method for calculating MPD was modified to account for the variations of macrotexture measurements. A vehicle-based test system was utilized to measure MPD periodically over an 18-month period since HFST installation. Statistical analysis was performed on the MPD measurements to identify the effects of influencing factors. Compared with the friction from LWST, MPD was equally effective in evaluating HFST performance. However, the use of MPD eliminated the errors as arisen in LWST testing and made it possible to detect surface distresses, including aggregate loss, delamination, and cracking. The expected overall MPD may be calculated by combining the MPD measurements made three months after installation at different HFST sites and used as a metric for evaluating HFST performance and QC/QA.
表面摩擦力是目前评估高摩擦表面处理（HFST）性能最常用的指标。然而，诸如锁轮防滑测试仪（LWST）等摩擦测试方法通常提供的是单点测量值。在弯道上进行LWST测试时可能会出现较大差异。基于21个实际的HFST项目，开展了一项研究，使用宏观纹理指标，即平均轮廓深度（MPD）来评估HFST的性能并改进其质量控制（QC）/质量保证（QA）程序。介绍了材料特性以了解HFST的各个方面。对计算MPD的方法进行了修改，以考虑宏观纹理测量的变化。自HFST安装以来，利用基于车辆的测试系统在18个月内定期测量MPD。对MPD测量值进行统计分析，以确定影响因素的影响。与LWST的摩擦力相比，MPD在评估HFST性能方面同样有效。然而，使用MPD消除了LWST测试中出现的误差，并能够检测表面病害，包括集料损失、分层和开裂。预期的总体MPD可以通过将不同HFST地点安装后三个月的MPD测量值进行合并来计算，并用作评估HFST性能和QC/QA的指标。
