Aging of Crushed Glass-Dredged Material Blend Embankments
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 134, Issue 11
Abstract
Four crushed glass (CG) and dredged material (DM) [(CG-DM)] blend embankments constructed (2004) and reconstructed (2005) to local DOT specifications were subjected to cone penetrometer tests (CPT). The CPT resistance of the original set of embankments was evaluated shortly after construction and approximately later, immediately prior to being demolished for purposes of a second study. Cone tip resistances were observed to double to triple with aging. For the CG-DM blend, a [40 tons per square foot (tsf)] or threefold increase in CPT tip resistance was measured. Likewise, isotropically consolidated, undrained triaxial shear tests were performed on relatively undisturbed thin-walled tube specimens of the aged CG-DM blend materials. The triaxial tests revealed that the effective friction angles of the aged materials increased by up to 8° over freshly prepared laboratory CG-DM blend specimens. The strength gains appeared to be more strongly linked to (amorphous) silica cementation rather than the formation of carbonates. Disturbance (demolition and reconstruction) generally reduced the in situ CPT behavior to that of the originally constructed embankments.
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Acknowledgments
The USACE-Philadelphia District provided the funds and dredged material to support this research under Contract No. UNSPECIFIEDW912BU-05-D-0001 to Schnabel Engineering (West Chester, Pa.). Mr. Michael Carnivale III, and Mr. Thomas W. Groff (USACE, retired) are thanked for their support and involvement. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the writer(s) and do not necessarily reflect the views of the project sponsors. Thanks to Dr. Craig Benson, Dr. John Bowders, Jr., Dr. Richard Deschamps, Dr. Anthony DiGioia, Dr. Tuncer Edil, and Mr. Robert Collins who participated in discussions regarding the possible existence of aging data in Class F ash fills.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 134 • Issue 11 • November 2008
Pages: 1676 - 1684
Copyright
© 2008 ASCE.
History
Received: Mar 29, 2007
Accepted: Jan 7, 2008
Published online: Nov 1, 2008
Published in print: Nov 2008
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