Characterization of Fines Produced by Sand Crushing
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 133, Issue 12
Abstract
Sand particle crushing generates coarse fragments with size and fine fragments, i.e., “fines,” with size . Yet, postcrushing fines are seldom characterized due to testing constraints. An experimental study was conducted to examine the size distribution evolution of fine fragments generated by crushing two uniform sands with contrasting degrees of mineral composition heterogeneity, in one-dimensional compression. The determination of fine fragment sizes was made possible by using a particle size analyzer that employs a small sample. The results indicate that the degree of mineral composition heterogeneity affects the load–deformation behavior of crushing sands and the resulting amounts and size distribution evolutions of the produced coarse and fine fragments. In particular, the trends gathered suggest that fines generation occurs by abrasion of parent particles, coarse fragment breakage, and subsequent breakage of fine fragments with sizes larger than the comminution limit.
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Acknowledgments
This research project was sponsored in part by the U.S. Department of Energy. The writers acknowledge the helpful suggestions and comments offered by Khaled Morsi and Ken Walsh.DOE
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 133 • Issue 12 • December 2007
Pages: 1626 - 1630
Copyright
© 2007 ASCE.
History
Received: Jul 17, 2006
Accepted: Mar 3, 2007
Published online: Dec 1, 2007
Published in print: Dec 2007
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