Role of Particle Angularity on the Mechanical Behavior of Granular Mixtures
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Volume 139, Issue 2
Abstract
Particle shape affects the mechanical behavior of soils, including packing density, stiffness, volume change during shear, and strength. Laboratory experiments conducted to study the mechanical response of sand mixtures made of round and angular grains show an increase in void ratio, small strain shear modulus (constant fabric), oedometric compressibility (fabric changes), and friction angle but a decrease in lateral stress coefficient as the mass fraction of angular particles increases. These results reflect variations in particle mobility and highlight the relative role of contact stiffness versus fabric changes.
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Acknowledgments
Support for this research was provided by the National Science Foundation with additional funding from the University of Ulsan and the Goizueta Foundation. Connor Barrett and F. Santamarina reviewed and carefully edited the manuscript.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 139 • Issue 2 • February 2013
Pages: 353 - 355
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Aug 23, 2010
Accepted: May 13, 2012
Published online: May 16, 2012
Published in print: Feb 1, 2013
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