STRESS-STRAIN AND VOLUME CHANGE CHARACTERISTICS OF TAILINGS MATERIALS (CRITICAL VOID RATIO, LIQUEFACTION, SILTY SANDS).

Persistent Link:
http://hdl.handle.net/10150/187763
Title:
STRESS-STRAIN AND VOLUME CHANGE CHARACTERISTICS OF TAILINGS MATERIALS (CRITICAL VOID RATIO, LIQUEFACTION, SILTY SANDS).
Author:
CHEN, HSIEN WU.
Issue Date:
1984
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The stress-strain and volume (or pore pressure) change characteristics of a Southern Arizona copper mine tailings material were investigated in the laboratory by conducting static loading triaxial compression tests. The tailings material is silty sand with highly angular grain shapes, rough grain surface texture and approximately 37% by weight passing No. 200 sieve. Isotropically consolidated drained (CID) and isotropically consolidated undrained (CIU) tests were performed on laboratory compacted samples. The test samples were loaded to relatively large axial strains (20-35%) to study the residual shear strength and the shear stress induced pore pressure change or volume change at steady state. Test sample densities and effective confining stresses were systematically varied in these tests. The definition of critical void ratio and "lower" critical void ratio were reviewed and their values for different effective confining stresses were obtained from the CID tests. Stress-strain and volume (or pore pressure) change curves and strength parameters obtained by using conventional and lubricated loading end platens were compared and discussed. Steady state lines and undrained brittleness indices were obtained from the CIU tests with strain-controlled and load-controlled loading methods. The liquefaction potential of the tailings material was then evaluated. These results were compared with others reported in the literature. The significance of the results was discussed with respect to tailings material behavior.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Strains and stresses.; Tailings (Metallurgy); Tailings embankments -- Arizona.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Civil Engineering and Engineering Mechanics; Graduate College
Degree Grantor:
University of Arizona
Advisor:
van Zyl, Dirk

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleSTRESS-STRAIN AND VOLUME CHANGE CHARACTERISTICS OF TAILINGS MATERIALS (CRITICAL VOID RATIO, LIQUEFACTION, SILTY SANDS).en_US
dc.creatorCHEN, HSIEN WU.en_US
dc.contributor.authorCHEN, HSIEN WU.en_US
dc.date.issued1984en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe stress-strain and volume (or pore pressure) change characteristics of a Southern Arizona copper mine tailings material were investigated in the laboratory by conducting static loading triaxial compression tests. The tailings material is silty sand with highly angular grain shapes, rough grain surface texture and approximately 37% by weight passing No. 200 sieve. Isotropically consolidated drained (CID) and isotropically consolidated undrained (CIU) tests were performed on laboratory compacted samples. The test samples were loaded to relatively large axial strains (20-35%) to study the residual shear strength and the shear stress induced pore pressure change or volume change at steady state. Test sample densities and effective confining stresses were systematically varied in these tests. The definition of critical void ratio and "lower" critical void ratio were reviewed and their values for different effective confining stresses were obtained from the CID tests. Stress-strain and volume (or pore pressure) change curves and strength parameters obtained by using conventional and lubricated loading end platens were compared and discussed. Steady state lines and undrained brittleness indices were obtained from the CIU tests with strain-controlled and load-controlled loading methods. The liquefaction potential of the tailings material was then evaluated. These results were compared with others reported in the literature. The significance of the results was discussed with respect to tailings material behavior.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectStrains and stresses.en_US
dc.subjectTailings (Metallurgy)en_US
dc.subjectTailings embankments -- Arizona.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineCivil Engineering and Engineering Mechanicsen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorvan Zyl, Dirken_US
dc.contributor.committeememberJimenez, Rudolf A.en_US
dc.contributor.committeememberScheele, Friedrichen_US
dc.identifier.proquest8424918en_US
dc.identifier.oclc691379722en_US
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