Correlate aggregate angularity characteristics to the skid resistance of asphalt pavement based on image analysis technology
Correlate aggregate angularity characteristics to the skid resistance of asphalt pavement based on image analysis technology
复制标题
基于图像分析技术将骨料棱角特征与沥青路面抗滑性能关联起来
DOI：
10.1016/j.conbuildmat.2020.118150
复制
发表时间：
2020-05-10
影响因子：
7.4
通讯作者：
Oeser, Markus
中科院分区：
文献类型：
--
作者：
Wang, Hainian;Wang, Chonghui;Oeser, Markus
集料的形态特征对路面抗滑性能的影响起着至关重要的作用，直接关系到行车安全和成本效益。利用第二代聚集成像测量系统(AIMS II)和X射线计算机断层扫描(CT)来评价颗粒的形状并捕捉其形态特征的变化。本文还进行了洛杉矶磨耗(LAA)试验，研究了集料棱角度的变化对沥青混合料抗磨性能的影响。在LAA抛光工艺100、300、500和1000转前后，分别采集不同尺寸的48个颗粒，用AIMS II和XCT进行测量，得到它们的形态特征。提出了AIMS II的参数梯度角度(GA)和集料表面积XCT的三维角度(3DA)。采用方差分析(ANOVA)对两种图像分析系统进行比较。利用所制备的集料进行了砂斑试验和英国摆试验等常规试验，建立了颗粒形态特性与沥青混合料抗滑性能相关参数之间的关系。通过回归分析发现，用形态特征值可以很好地描述沥青混合料的抗压性能。验证了X射线CT分析系统能准确评价沥青混合料路面使用性能的有效性。颗粒形态特征的变化是沥青路面抗滑性能下降的主要原因。(C)2020年由爱思唯尔有限公司出版。
The impact of aggregate morphological characteristics plays a key role in the skid resistance of road surface due to driving safety and cost benefits. The 2nd generation of the Aggregate Imaging Measurement System (AIMS II) and X-ray Computed Tomography (CT) were utilized to evaluate the shape of particles and capture the change in their morphological characteristics. The Los Angeles Abrasion (LAA) Test was also conducted in this paper to investigate the influence of variations in aggregate angularity on the resistant performance of asphalt mixtures. Before and after 100, 300, 500, and 1000 rotations of LAA polishing process, 48 particles from each different size were adopted and measured using AIMS II and XCT to obtain the value of their morphological properties. The parameter gradient angularity (GA) with AIMS II and three-dimensional angularity (3DA) with XCT of aggregate surface area were proposed from these tests. Analysis of Variance (ANOVA) was employed to compare these two image analysis systems. Conventional experiments including the sand patch test and British pendulum test, were applied using the prepared aggregates to establish a correlation between the morphological properties of grains and the parameters related to the skid resistance of asphalt mixtures. It was found that the resistance performance of asphalt mixtures can be well described with a function using the value of morphological properties through regression analysis. The efficacy of the X-ray CT analyzing system was verified to evaluate the performance of asphalt mixture pavement precisely. The changes in morphological characteristics of particles are the main causes for degradation in the skid resistance of asphalt pavement. (C) 2020 Published by Elsevier Ltd.