粗集料综合形态特征与抗磨耗性能的关联性

为了研究粗集料的抗磨耗性能与粗集料形态特征之间的关系，基于第二代集料图像测量系统（AIMS Ⅱ）及其形态参数，建立了粗集料抗磨耗性能的评价手段。本文选择5种岩性的11种不同粗集料，集料粒径为9.5-13.2mm，采用AIMS Ⅱ测试11种不同类型的粗集料的形态特征，利用AIMS Ⅱ现有的球度、梯度棱角和表面纹理指标，分析集料样本数量评价的合理性。在此基础上，测试各类型集料样本的磨耗值，结合AIMS II的球度、梯度棱角、表面纹理和形态综合指标（CAAT）分析集料磨耗前后的形态变化规律，进而评价各个样本的抗磨耗性能。结果表明：CAAT与粗集料磨耗值有良好的线性关系，拟合相关系数为0.956，采用CAAT评价集料抗磨耗性能具有一定的合理性。

Study on aggregate abrasion resistance performance based on aggregate image measurement system

In order to study the relationship between the wear resistance of aggregates and the morphological characteristics of aggregates, based on the second generation of Aggregate Image Measurement System (AIMS II) and its morphological parameters, the evaluation method for the wear resistance of aggregates was established. In this paper, 11 different coarse aggregates from 5 lithologies with aggregate particle sizes ranging from 9.5-13.2mm were selected. AIMS II was used to measure the morphological characteristics of these 11 different types of coarse aggregates on aggregates. The AIMS II indexes including sphericity, gradient angularity and surface texture were used to analyze the rationality of aggregate sample quantity in a single test. On this basis, the abrasion values of each type of aggregate samples were tested, and the morphological changes of aggregates after the abrasion were analyzed by combining the indexes of AIMS II including sphericity, gradient angularity, surface texture and comprehensively morphological indexes (CAAT), so as to evaluate the wear resistance of each sample. The results show that there is a good linear relationship between CAAT and the abrasion value of coarse aggregate, and the fitting correlation coefficient is 0.956. It is reasonable to adopt CAAT to evaluate the wear resistance of aggregate.