Doctoral Dissertations


"A considerable amount of research has been conducted on the strength of both clays and sands, while research on low plasticity silt has been limited. The objective of this experimental study is to evaluate the cyclic behavior and liquefaction potential of low plasticity silts. The cyclic behavior of sand-like and clay-like soils have been compared to the cyclic behavior of low plasticity silts.

The soil used in the study program has been obtained from the Mississippi River Valley and consists of modified loessial silt deposits with a plasticity index of about 6. In order to achieve a soil fabric similar to what occurs in natural deposition, samples have been consolidated from slurry inside a large consolidometer and inside a split mold using top and bottom loading. The liquefaction potential of the low plasticity silt specimens have been evaluated using cyclic triaxial tests. The effects of stress history, confinement pressure, anisotropy, and plasticity have been evaluated in order to better understand their cyclic behavior. The study extends to post liquefaction analysis and strength characteristics of liquefied silt. Finally, laboratory CPT and Vane Shear tests were conducted and the results were compared to triaxial test results"--Abstract, page iii.


Stephenson, Richard Wesley

Committee Member(s)

Luna, Ronaldo
Rogers, J. David
Ge, Yu-Ning (Louis)
Petry, Thomas M.


Civil, Architectural and Environmental Engineering

Degree Name

Ph. D. in Civil Engineering


United States. Bureau of Reclamation


Missouri University of Science and Technology

Publication Date

Spring 2008


xiv, 306 pages

Note about bibliography

Includes bibliographical references (pages 298-305).


© 2008 Ali Mohammad Izadi, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type




Subject Headings

Soil liquefaction
Soil mechanics
Soils -- Plastic properties

Thesis Number

T 9386

Print OCLC #


Electronic OCLC #


Link to Catalog Record

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