Analysis of mineral composition and microstructure of gravel aggregate based on XRD and SEM

作者：Wu, Jiangfeng; Wang, Linbing^*; Meng, Lingjian

来源：Road Materials and Pavement Design, 2017, 18(sup3): 139-148.

DOI：10.1080/14680629.2017.1329869

• X-ray diffraction
• scanning electron microscopy
• phase identifying
• energy dispersive spectrum analysis
• fractal dimension

The microscopic properties of gravel material have significant influences on its macro service performance. In this paper, five different gravel aggregates, namely quartzite, gneiss, sandstone, basalt, and gneiss are selected for X-ray diffraction (XRD) experiments. The tested data are analysed by JADE 6.0 software with phase search and match on aggregate mineral composition. Aggregate morphology analysis is conducted using scanning electron microscopy (SEM). Results show that the combined XRD and SEM techniques can be used in aggregate morphology characteristics and chemical composition determination. The fractal dimensions of different types of rock particles are calculated using MATLAB software with the box counting method, which can be used as an evaluation index to distinguish different types of rocks.

• 出版日期2017
• 单位北京科技大学; Virginia Tech; 美国弗吉尼亚理工大学(Virginia Tech)