Abstract The morphological parameters of coarse aggregates, including the angularity, flat and elongated (FE) and particle size, strongly influence the performance of asphalt concrete. At present, the measurement of the angularity of coarse aggregate is affected by the particle size and the FE. To achieve independent characterization of angularity, the compression method is used to eliminate the influence of FE on angularity. In this paper, the angularity index (AI) is calculated by fitting ellipse method, which can eliminate the influence of aggregate particle size on the angularity of coarse aggregate. The research results show that the independent characterization of the angularity of coarse aggregates can improve the measurement accuracy of the angularity of coarse aggregates.

中文翻译：

---

粗骨料棱角的独立表征与试验研究

摘要 粗集料的形态参数，包括棱角、扁平细长（FE）和粒径，对沥青混凝土的性能有很大影响。目前，粗骨料棱角的测量受粒径和FE的影响。为了实现角度的独立表征，采用压缩方法来消除有限元对角度的影响。本文采用拟合椭圆法计算棱角指数（AI），可以消除骨料粒度对粗骨料棱角的影响。研究结果表明，粗集料棱角的独立表征可以提高粗集料棱角的测量精度。