Influence of Particle Breakage on Critical State Line of Rockfill Material
Publication: International Journal of Geomechanics
Volume 16, Issue 1
Abstract
The influences of particle breakage on the position of the critical state line (CSL) were systematically investigated in this paper through a series of large-scale triaxial compression tests on Tacheng rockfill material (TRM). It was found that the critical-state stress ratio of TRM (i.e., the gradient of the CSL in the space) was approximately regarded as a constant. In the space, the CSL of TRM descended with a decrease in the initial void ratio, whereas the gradient of the CSL was constant. A procedure was established for evaluating the critical state point at a same particle breakage, which comprised the breakage critical state line (BCSL). An increase of the particle breakage led to not only a vertical translation but also a rotation on the BCSL of TRM in the space, which was similar to the observation of Dog’s Bay sand. Consequently, the initial gradation (or the corresponding initial void ratio) was the dominant factor that affected the position of the CSL of TRM in the space.
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Acknowledgments
The authors would like to acknowledge the financial support from the 111 Project (Grant No. B13024), the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT1125), the Project supported by the National Natural Science Foundation of China (Grant No. 51379067), and the Fundamental Research Funds for the Central Universities (Grant No. 106112015CDJXY200008).
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International Journal of Geomechanics
Volume 16 • Issue 1 • February 2016
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© 2015 American Society of Civil Engineers.
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Received: Jul 24, 2014
Accepted: Apr 21, 2015
Published online: Jun 16, 2015
Discussion open until: Nov 16, 2015
Published in print: Feb 1, 2016
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