Effects of Swelling During Saturation in Triaxial Tests in Clays

Wanjei Cho; Terence P. Holman; Young Hoon Jung; Richard J. Finno

doi:10.1520/GTJ100797

Effects of Swelling During Saturation in Triaxial Tests in Clays

Wanjei Cho, Terence P. Holman, Young Hoon Jung, Richard J. Finno^*

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

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)
Pages (from-to)	378-386
Number of pages	9
Journal	Geotechnical Testing Journal
Volume	30
Issue number	5
DOIs	https://doi.org/10.1520/GTJ100797
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

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10.1520/GTJ100797

Cite this

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title = "Effects of Swelling During Saturation in Triaxial Tests in Clays",

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.",

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author = "Wanjei Cho and Holman, {Terence P.} and Jung, {Young Hoon} and Finno, {Richard J.}",

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AU - Cho, Wanjei

AU - Holman, Terence P.

AU - Jung, Young Hoon

AU - Finno, Richard J.

PY - 2007/4/30

Y1 - 2007/4/30

N2 - 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.

AB - 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.

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Effects of Swelling During Saturation in Triaxial Tests in Clays

Abstract

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Keywords

ASJC Scopus subject areas

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