Crushed Glass-Dredged Material (CG-DM) Blends: Role of Organic Matter Content and DM Variability on Field Compaction
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 134, Issue 11
Abstract
Trial embankments comprised of crushed glass-dredged material (CG-DM) blends and a 100% DM embankment were constructed to provide the necessary data sets to determine if a moisture content (MC) correction was required for the nuclear density (ND) gauge, as DM may contain a high organic matter content (OC). The MCs of thin-walled tube samples of CG-DM blends collected immediately below the ND gauge were compared to the corresponding ND gauge readings. A direct correlation between the MC data pairings from the tube samples and ND gauge readings showed that the ND gauge was greater than 97% accurate for MCs up to 55% and OCs up to 10% for the CG-DM blends evaluated in this study. However, the MC determined by the ND gauge was underpredicted (not overpredicted) by approximately 2.5%, contrary to theoretical expectations. A comparison of the average MC results per embankment indicated that the ND gauge was generally within 1% of the tube sample values, again on the low side. Interestingly, the rutting of the individual embankment lifts, often used as an informal metric for compaction compliance also was found to be contrary to expectations. The (re)constructed CG-DM embankments of this study were again shown to satisfy local Department of Transportation embankment construction criteria in most cases.
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Acknowledgments
The USACE-Philadelphia District provided the funds and dredged material to support this research under Contract No. W912BU-05-D-0001 to Schnabel Engineering (West Chester, Pa.). Messrs. Michael Carnivale III, and Thomas W. Groff (USACE) are thanked for their support and involvement. Apex Companies, LLC, provided field construction services and the assistance of Atwood Davis and Michael Oates in several project phases are greatly appreciated. Ms. Robyn Myers (Troxler) provided helpful comments to the manuscript. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the writers and do not necessarily reflect the views of the project sponsors.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 134 • Issue 11 • November 2008
Pages: 1665 - 1675
Copyright
© 2008 ASCE.
History
Received: Jan 12, 2007
Accepted: Jan 7, 2008
Published online: Nov 1, 2008
Published in print: Nov 2008
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