Geostatistical Analysis for Spatially Referenced Roller-Integrated Compaction Measurements
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 136, Issue 6
Abstract
An approach to quantify nonuniformity of compacted earth materials using spatially referenced roller-integrated compaction measurements and geostatistical analysis is discussed. Measurements from two detailed case studies are presented in which univariate statistical parameters are discussed and compared to geostatistical semivariogram modeling parameters and analysis. The univariate and geostatistical parameter values calculated from the roller-integrated measurements are also compared to traditional spot test acceptance criteria. Univariate statistical parameter values based on roller-integrated measurement values provide significantly more information than traditional point measurements, while geostatistics can be used to identify regions of noncompliance and prioritize areas for rework.
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Acknowledgments
The writers acknowledge the support of the Minnesota Department of Transportation (Mn/DOT), the Federal Highway Administration (FHWA), and Caterpillar Inc. (CAT) for funding these studies. Numerous people from Mn/DOT provided assistance in identifying and providing access to grading projects. John Siekmeier and Ruth Roberson from Mn/DOT and several Mn/DOT field engineers provided assistance in organizing the compaction data. The writers thank Mark Thompson, Heath Gieselman, Michael Kruse, Amy Heurung, and Michael Blahut at Iowa State University and Paul Corcoran, Tom Congdon, Donald Hutchen, Allen Declerk, and Glen Feather at CAT for providing assistance with the field and laboratory testing.
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© 2010 ASCE.
History
Received: Jul 3, 2008
Accepted: Nov 9, 2009
Published online: Nov 13, 2009
Published in print: Jun 2010
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