Influence of Mineral Composition on the Simple Shear Response of Sands: Experimental Study
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 134, Issue 12
Abstract
Experiments were conducted to evaluate the role of mineral composition on the direct simple shear response (i.e., volume change during shear) of uniform sands composed of “strong” quartz grains and “weak” calcareous grains. The dry specimens were loaded in a custom-made direct simple shear apparatus and separated after testing with respect to grain size by sieving and with respect to mineral composition by dissolving the calcareous grains retained on each sieve. The results indicate that the presence of weak grains affects the direct simple shear response of predominately strong-grained sands: at low stresses, the response is controlled by particle shape; at high stresses, the response is controlled by weak particle breakage.
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Acknowledgments
This research project was sponsored by the National Science Foundation (NSFCMMI 700914). The writers thank Tyler Petersen and Greg Morris for constructing the direct simple shear apparatus and acknowledge the helpful suggestions and comments offered by Monte Marshall and Ken Walsh.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 134 • Issue 12 • December 2008
Pages: 1820 - 1824
Copyright
© 2008 ASCE.
History
Received: Sep 4, 2007
Accepted: Feb 4, 2008
Published online: Dec 1, 2008
Published in print: Dec 2008
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