Development of aggregate micro-texture during polishing and correlation with skid resistance
Development of aggregate micro-texture during polishing and correlation with skid resistance
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DOI：
10.1080/10298436.2018.1502436
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发表时间：
2020-04-15
影响因子：
3.8
通讯作者：
Oeser, Markus
中科院分区：
文献类型：
--
作者：
Wang, Dawei;Zhang, Zeyu;Oeser, Markus
本文介绍了一项实验室研究，旨在表征不同波长下集料微结构对抗滑性能的影响。为了实现这一目标，我们使用了11种集料来制备集料样品。利用Micro-Deval(MD)和Aachen抛光机(APM)表征了交通荷载引起的集料形态的变化。采用Wehner/Schulze(W/S)试验进行抗滑性能测试。使用高分辨率轮廓仪收集样品的表面形貌。根据采集的表面形貌计算骨料试件的二维功率谱密度，以考察磨损和抛光引起的织构差异。在此基础上，确定了影响路面抗滑性能的关键波长范围。然后将关键波长范围划分为四个子范围；在此基础上，研究了微观织构对抗滑性能的影响。分析表明，MD和APM对织构的不同波长范围有影响。对抗滑性能影响最大的波长范围是32-128微米。矿物性质和集料组成直接影响抗滑性能和抛光性能。
This paper presents a laboratory study aiming to characterise the influences of aggregate micro-texture on the skid resistance under consideration of different wavelengths. To achieve this objective, 11 kinds of aggregates were used to prepare aggregate specimens. Micro-Deval (MD) and Aachen Polishing Machine (APM) were utilised to represent the changes in aggregate morphology which is caused by traffic loading. The Wehner/Schulze (W/S) test was used to measure the skid resistance. A high-resolution profilometer was utilised to collect the surface topography of the specimens. The two-dimensional power spectral density of the aggregate specimens was calculated based on the collected surface topography to investigate the differences in texture resulting from abrasion and polishing. Furthermore, the key wavelength ranges of the pavement surface texture responsible for the skid resistance is identified. The key wavelength range was then divided into four subranges; thereafter, the effect of the micro-texture on the skid resistance is investigated. Analyses show that the MD and APM affected different wavelength ranges of the texture. The most influential wavelength range for the skid resistance is found to be 32-128 mu m. Mineral properties and the composition of aggregate directly affect the skid-resistant performance as well as the polishing resistance.