Fractal crushing of carbonate and quartz sands along the specimen height under impact loading. (10th September 2018)

• Record Type: Journal Article
• Authors: Xiao, Yang; Yuan, Zhengxin; Lv, Yang; Wang, Lei; Liu, Hanlong
• Is Part Of: Construction & building materials. Volume 182(2018)
• Page Start: 188
• Page End: 199
• Publication Date: 2018-09-10
• Subjects: Carbonate sand -- Quartz sand -- Fractal dimension -- Particle breakage -- Impact loading -- Input work; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.06.112
• Languages: English
• ISSNs: 0950-0618

Abstract

Graphical abstract: Highlights: Carbonate sand exhibited more displacement than quartz sand. Grain crushing is inhomogeneous along the specimen height. Carbonate sand undergoes more particle breakage than quartz sand. Quartz sand exhibits more diverse along the specimen height than carbonate sand. Abstract: Particle breakage is a significant phenomenon in civil, transportation and mining engineering. In this study, the evolution of the particle size distribution (PSD) and that of particle breakage of an overall sample and along the specimen height were systematically investigated via a series of impact loading tests for two sands: a carbonate sand (CS) and a quartz sand, i.e., Fujian sand (FS). The test results on the overall sample showed that the CS sample exhibited more changes in void ratio than the FS sample. In addition, the increase in the breakage extent in the overall CS sample at the initial loading stage was greater than that in the overall FS sample, and the final breakage extent in the overall CS sample was 45.8% larger than that in the overall FS sample. The PSD curve in an effective layer for the CS sample or FS sample broadened compared with that in the substratum effective layer, implying that the particle breakage was inhomogeneous along the specimen height. The CS or FS in the topmost effective layer beneath the hammer reached its corresponding ultimate fractal gradation, whereas the CS or FS in the lower layers presented values below the ultimate fractal gradation. Furthermore, the PSD and grain crushing distributions were more inhomogeneous along the FS sample than the CS sample.