机制砂颗粒形状的评价方法及其特征研究  

Evaluation Method and Characteristics of Manufactured Sand Particle Shape

作　　者：吴家乐 孙江涛 张稳涛 王林 曾春涛 伍文振 赵立 王亚楠 沈卫国[1,2] WU Jiale;SUN Jiangtao;ZHANG Wentao;WANG Lin;ZENG Chuntao;WU Wenzhen;ZHAO Li;WANG Yanan;SHEN Weiguo(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Poly Changda Engineering Company Limited,Guangzhou 545000,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]武汉理工大学材料科学与工程学院,武汉430070 [3]保利长大工程有限公司,广州545000

出　　处：《硅酸盐通报》2022年第12期4180-4188,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家重点实验室开放课题(FH2018sk201)。

摘　　要：为研究机制砂粒形表征方法及特点,采用集料图像测量系统(AIMS)和数字图像处理(DIP)技术测试了5种机制砂的颗粒形态。基于现有研究存在的不足提出了一种改进的粒形测试方法,并研究了不同粒形表征参数之间的关系。结果表明:随着粒径范围从大到小,机制砂的棱角性呈先增大后减小的趋势,而二维形状值无明显变化规律;0.3~0.6 mm的机制砂可以反映整体粒径范围的棱角性;通过单次投影进行图像处理获取的粒形参数有较大的波动范围,无法准确判断机制砂的颗粒形状;纵横比与凹凸度有较强的相关性,粗糙度与纵横比、圆度、凹凸度的相关性较强,而分形维数与其他几种参数都不具有相关性;通过改进的DIP技术得出的粒形评价结论与AIMS得出的评价结论一致,具有一定的可行性和推广价值。In order to study the particle shape characteristics and characterization method of manufactured sand, the particle shape of five kinds of manufactured sand was tested by aggregate image measurement system(AIMS) and digital image processing(DIP) technology. Based on the shortcomings of existing research, an improved particle shape measurement method was proposed, and the relationship between different particle shape characterization parameters was studied. The results show that the angularity of manufactured sand increases first and then decreases with the particle size range from large to small, while the two-dimensional shape value has no obvious change law. The manufactured sand in the range of 0.3~0.6 mm can reflect the angularity of overall particle size range. The particle shape parameters obtained by single projection image processing have a large fluctuation range, so it is impossible to accurately judge the particle shape of manufactured sand. Aspect has a strong correlation with convexity. Regularity has a strong correlation with aspect, roundness and convexity, while fractal dimension has no correlation with other parameters. The particle shape evaluation conclusion obtained by improved DIP technology is consistent with AIMS, which has certain feasibility and popularization value.

关 键 词：机制砂 粒形 形状参数 集料图像测量系统 数字图像处理技术 相关性 

分 类 号：TU521.1[建筑科学—建筑技术科学]