Estimating Compaction of Cohesive Soils from Machine Drive Power
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Volume 134, Issue 12
Abstract
To evaluate roller-integrated machine drive power (MDP) technology for predicting the compaction parameters of cohesive soils considering the influences of soil type, moisture content, and lift thickness on machine power response, a field study was conducted with test strips using three cohesive soils and several nominal moisture contents. Test strips were compacted using a prototype CP-533 static padfoot roller with integrated MDP technology and tested using various in situ compaction measurement devices. To characterize the roller machine-soil interaction, soil testing focused on measuring compaction parameters for the compaction layer. Variation in both MDP and in situ measurements was observed and attributed to inherent variability of the compaction layer and measurement errors. Considering the controlled operations to create relatively uniform conditions of the test strips, measurement variability observed in this study establishes a baseline for acceptable variation in production operations using MDP technology in cohesive soils. Predictions of in situ compaction measurements from MDP were found to be highly correlated when moisture content and MDP-moisture interaction terms were incorporated into regression models.
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Acknowledgments
The FHWA Federal Technology and Innovation Program, Caterpillar, Inc., the Highway Division of the Iowa Department of Transportation (Iowa DOT), and the Iowa Highway Research Board (IHRB) sponsored this study under Contract No. UNSPECIFIEDTR-495. Further, this material is based upon work supported under a National Science Foundation Graduate Research Fellowship.NSF The writers are grateful for this sponsorship. They would also like to thank Professor Max Morris and Kari Jovaag for their contribution to the statistical analyses. The writers would also like to acknowledge Tom Congdon, Allen DeClerk, Paul Corcoran, Liqun Chi, Tom Cackler, Ed Jaselskis, and Vern Schaefer. Isaac Drew, Lifeng Li, Matt Veenstra, Heath Gieselman, and Muhannad Suleiman provided assistance with field testing.
References
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 134 • Issue 12 • December 2008
Pages: 1771 - 1777
Copyright
© 2008 ASCE.
History
Received: Oct 12, 2006
Accepted: Oct 10, 2007
Published online: Dec 1, 2008
Published in print: Dec 2008
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