Evaluating the Constrained Modulus and Collapsibility of Loess from Standard Penetration Test
Publication: International Journal of Geomechanics
Volume 7, Issue 4
Abstract
Argentinean loess has mechanical properties highly dependent on moisture content. Sand and silt particles jointed by clay bridges and precipitated salts form macropores which undergo high volume decrease when loaded or wetted. The constrained deformation modulus is an important parameter for the assessment of settlement and to characterize loessical formations. This work analyzes experimental results obtained in double-oedometer test and standard penetration tests (SPT) performed in silty loess. Typical behaviors observed in double-oedometer test are related to the decrease of soil modulus, collapsibility, cementation, and presence of disseminated cementing nodules. Correlations between the constrained modulus, collapsibility, and the blow count from SPT are presented. The influence of disseminated nodules, moisture content, and collapsed soil structure on the constrained modulus and collapsibility of loess is highlighted.
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Acknowledgment
The writer thanks to the Argentinean National Research Council (CONICET) for partial support this research.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 7 • Issue 4 • July 2007
Pages: 307 - 310
Copyright
© 2007 ASCE.
History
Received: Dec 19, 2005
Accepted: Apr 7, 2006
Published online: Jul 1, 2007
Published in print: Jul 2007
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