VISCOELASTIC RESPONSE OF A KAOLINITE

RECOGNITION OF THE FACT THAT CLAYS EXHIBIT BOTH VISCOUS AND ELASTIC RESPONSE CHARACTERISTICS HAD LED TO THE USE OF THE THEORY OF VISCOELASTICITY FOR DESCRIBING THEIR MECHANICAL BEHAVIOR. THIS PAPER PRESENTS A BRIEF OUTLINE OF PERTINENT CONCEPTS FROM THIS THEORY TO ESTABLISH A FRAMEWORK FOR THE PRESENTATION AND INTERPRETATION OF THE EXPERIMENTAL RESULTS. THE EXPERIMENTAL PROGRAM WAS CONDUCTED ON A WATER-WASHED GEORGIA KAOLIN AT NORMAL MOISTURE CONTENTS OF 60, 75, AND 100 PERCENTS, AND INCLUDED A SERIES OF OSCILLATORY SHEAR TESTS OVER A FREQUENCY RANGE OF TWO DECADES. THESE TESTS WERE PERFORMED ON A WEISSENBERG RHEOGONIOMETER WITH A CONE-AND-PLATE SAMPLE HOLDER. THIS ARRANGEMENT PRODUCES ESSENTIALLY HOMOGENEOUS SHEAR STRAINS THROUGH THE SPECIMEN. THE EXPERIMENTAL RESULTS SHOW THAT THE STRESS-STRAIN RESPONSE OF THE CLAY IS FREQUENCY-DEPENDENT AND IS DEFINITELY NONLINEAR, EVEN AT SMALL STRAINS. THE GREATEST FREQUENCY DEPENDENCE, AS MANIFESTED IN THE COMPLEX SHEAR MODULUS AND PHASE ANGLE, OCCURS IN A REGION CHARACTERISTICS OF MANY POLYMER SYSTEMS. THE LOGARITHM OF THE COMPLEX SHEAR MODULUS IS FOUND TO VARY APPROXIMATELY AS THE WATER CONTENT OR CONSISTENCY OF THE CLAY-WATER MIXTURE. /AUTHOR/

• Authors:
  • Krizek, R J
  • Franklin, A G
• Conference:
  • Clays & Clay Minerals Conference Proc
• Publication Date: 1966

Subject/Index Terms

• TRT Terms: Behavior; Clay; Frequency (Electromagnetism); Kaolinite; Mechanics; Moisture content; Oscillation; Shear tests; Theory; Viscoelasticity
• Old TRIS Terms: Reaction
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00228981
• Record Type: Publication
• Report/Paper Numbers: pp 227-240
• Files: TRIS
• Created Date: Aug 15 2004 1:48AM