Strength and Deformation of Rockfill Material Based on Large-Scale Triaxial Compression Tests. II: Influence of Particle Breakage
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 140, Issue 12
Abstract
The amount of particle breakage of Tacheng rockfill material (TRM) in the process of shearing was quantitatively measured by a relative breakage index. The fractal dimension of TRM at the final state of the tests was found to be linearly related to the void ratio and logarithm of the confining pressure. The influences of the relative breakage index on the friction angle, modulus, and deformation were investigated based on a series of large-scale triaxial compression tests on TRM. An increase in the relative breakage index leads to an increase in the volumetric strain and to decreases in the peak state friction angle, critical state friction angle, deviatoric strain, and critical state void ratio. The test results were used to propose simple formulations pertaining to the relative breakage index for the strength and deformation indexes (e.g., peak state friction angle, critical state friction angle, initial elastic modulus, secant modulus at 50% of the peak strength, volumetric strain, deviatoric strain, and critical state void ratio).
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Acknowledgments
The authors thank the 111 Project (Grant No. B13024), Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT1125), the National Natural Science Foundation of China (Grant No. 51379067), and Fundamental Research Funds for the Central Universities (Grant No. 2011B14514) for the financial support. The authors also thank Dr. W. G. Zhang and Dr. J. He, School of Civil and Environmental Engineering, Nanyang Technological University, for improving the language used in this paper.
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Journal of Geotechnical and Geoenvironmental Engineering
Volume 140 • Issue 12 • December 2014
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© 2014 American Society of Civil Engineers.
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Received: Oct 19, 2013
Accepted: Jul 15, 2014
Published online: Aug 21, 2014
Published in print: Dec 1, 2014
Discussion open until: Jan 21, 2015
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