Abstract
Effects of swelling during saturation in triaxial tests on compressible Chicago glacial clays are assessed from results of triaxial compression tests on block samples cut from excavations, thin-wall Shelby tube samples, and reconstituted specimens. The results are presented in terms of the stress-strain response during saturation, k0 reconsolidation and shearing. Bender element tests were also performed to investigate the effects of swelling on the shear wave velocities during k0 reconsolidation. Results showed that the swelling during saturation lowered the shear wave velocity, thereby inferring a change in the original structure of natural clay. Responses at strains less than 0.01%were most affected by the saturationinduced swelling. To minimize these changes, it is recommended that the measured residual stress is applied prior to saturating the soil. Based on these results, the saturation stage should be considered as much a part of a triaxial test as consolidation and shearing.
Original language | English (US) |
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Pages (from-to) | 378-386 |
Number of pages | 9 |
Journal | Geotechnical Testing Journal |
Volume | 30 |
Issue number | 5 |
DOIs | |
State | Published - Apr 30 2007 |
Funding
Financial support for this work was provided by National Science Foundation grant CMS-0219123 and the Infrastructure Technology Institute (ITI) of Northwestern University. The support of Dr. Richard Fragaszy, program director at NSF, and Mr. David Schulz, ITI’s director, is greatly appreciated. Professor Paul Mayne of Georgia Institute of Technology conducted the seismic cone tests at the Ford Center. Financial support for this work was provided by National Science Foundation grant CMS-0219123 and the Infrastructure Technology Institute (ITI) of Northwestern University. The support of Dr. Richard Fragaszy, program director at NSF, and Mr. David Schulz, ITI's director, is greatly appreciated. Professor Paul Mayne of Georgia Institute of Technology conducted the seismic cone tests at the Ford Center.
Keywords
- clay
- residual stress
- saturation
- swelling
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology