TIME-DEPENDENT INCREASE IN SHEAR MODULUS OF CLAY

Two time domains for modulus increase have been identified, primary and secondary. Primary is the same as for primary consolidation and secondary is the open interval after primary in which modulus increases continuously with time. It was found that all cohesive soils exhibit secondary modulus increase, i.e., (1) The modulus increase for clays ranges from 3% to 20% per logarithmic cycle of time; (2) confining pressure dependence can be removed by normalizing modulus based on the 1,000-min modulus; and (3) secondary increases in modulus occur at all shear strain amplitudes. The rate of secondary increase is related to the undrained shearing strength and the initial void ratio of the soil. An empirical equation is presented to show this relationship. Thixotropy best explains secondary modulus increase. /ASCE/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Anderson, D G
  • Woods, R D
• Publication Date: 1976-5

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 525-537
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 102
  • Issue Number: GT5
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Clay; Cohesive soils; Consolidation; Equations; Shear modulus; Soils; Thixotropy; Time dependence; Undrained shear strength; Void ratios
• Uncontrolled Terms: Soil consolidation
• Old TRIS Terms: Empirical equations
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00139329
• Record Type: Publication
• Report/Paper Numbers: ASCE #12147 Proceeding
• Files: TRIS
• Created Date: Sep 16 1976 12:00AM