Compression and Shear Behavior of Mudstone Aggregates
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 130, Issue 5
Abstract
In this paper, a staged compression–immersion–direct shear test was conducted on the compacted samples of crushed mudstone aggregates, and its compressive and shear behavior are discussed with attention to cementation effects. Compression behavior of the compacted samples was influenced significantly by the compaction degree as expected. So were the shear behavior and shear strength. Immersion caused an additional compression and a reduction in mobilized shear stress and in the dilatant nature during shear at low applied pressure levels. Moreover, immersion reduced significantly the peak shear strength parameter c with only a little change in ϕ. The compression lines and critical state lines of the nonimmersed and immersed specimens seem to parallel each other, and the compression line of the nonimmersed and the critical state line of the immersed form the upper and lower bounds, respectively. A gap between the shear stress–void ratio lines of the specimens with and without immersion can be considered to represent a combined effect of cementation retained in a crushed mudstone aggregate itself and an interlocking effect of aggregates.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 130 • Issue 5 • May 2004
Pages: 519 - 525
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Nov 8, 2002
Accepted: Jul 30, 2003
Published online: Apr 15, 2004
Published in print: May 2004
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