Chapter
Apr 26, 2012
Small-Strain Stiffness Behavior of Unsaturated Compacted Subgrade
Authors: A. Sawangsuriya, Ph.D. [email protected], T. B. Edil [email protected], P. J. Bosscher [email protected], and X. Wang [email protected]Author Affiliations
Publication: Unsaturated Soils 2006
Abstract
This paper presents an experimental investigation of the small-strain stiffness behavior of an unsaturated compacted subgrade soil. The small-strain stiffness tests were performed under two testing schemes, namely as-compacted state (at the initial compaction condition during construction) and post-compacted state (service life after construction when subject to moisture regime changes). A non-destructive elastic wave propagation technique using bender elements was utilized to monitor and to evaluate the shear wave velocity and corresponding small-strain shear modulus (Go) of the compacted soil specimens. A new test apparatus was designed to control two stress state variables, the net confining pressure and the matric suction, during the Go measurements. Finally, a model was proposed for the small-strain stiffness behavior of unsaturated compacted subgrade soil.
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© 2006 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Compacted soils
- Compaction (material)
- Continuum mechanics
- Dynamics (solid mechanics)
- Engineering mechanics
- Geomechanics
- Geotechnical engineering
- Infrastructure
- Material mechanics
- Materials characterization
- Materials engineering
- Pavements
- Seismic waves
- Shear waves
- Soil mechanics
- Soil modulus
- Soil properties
- Soils (by type)
- Solid mechanics
- Stiffening
- Strain
- Structural behavior
- Structural engineering
- Subgrades
- Transportation engineering
- Waves (mechanics)
Authors
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Student, Department of Civil and Environmental Engineering, University of Wisconsin-Madison, 2226 Engineering Hall, 1415 Engineering Drive, Madison, WI 53705. E-mail: [email protected]
Professor, Department of Civil and Environmental Engineering, University of Wisconsin-Madison, 2226 Engineering Hall, 1415 Engineering Drive, Madison, WI 53705. E-mail: [email protected]
Professor, Department of Civil and Environmental Engineering, University of Wisconsin-Madison, 2226 Engineering Hall, 1415 Engineering Drive, Madison, WI 53705. E-mail: [email protected]
Laboratory Manager; Department of Civil and Environmental Engineering, University of Wisconsin-Madison, 2226 Engineering Hall, 1415 Engineering Drive, Madison, WI 53705. E-mail: [email protected]
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