Stick-slip of Lightly Loaded Limestone

The phenomenon of stick-slip of a limestone tested in direct shear at a constant rate of strain under normal loads of 0.75-20.0 kg/cm² and temperatures from 30-200°C was investigated. Stick-slip was found to depend on temperature, normal load, and prior frictional history of the rock. Stick-slip could always be induced from smooth slip by raising the temperature. Temperatures above that required to induce stick-slip result in larger slips, longer sticks, and higher shear load relaxations. At normal loads above 3.00 kg/cm², stick-slip began at 30°. Accumulation of debris has the same effect as lightening normal load, allowing smooth slip below 100°C. Smooth slip below this temperature is attributed to adsorbed water. The dependence of stick-slip on temperature and reaction to the creation or introduction of debris led to the conclusion that stick-slip of limestone is a result of asperity to asperity bonding.

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  • Corporate Authors:

    Iowa State University, Ames

    Earthworks Engineering Research Center, 2711 South Loop Drive, Suite 4700
    Ames, IA  United States  50010
  • Authors:
    • Drennon, C B
    • Handy, Richard L.
  • Publication Date: 2008

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 226-239
  • Monograph Title: The Papers of R.L. Handy. A Geotechnical Legacy of Iowa State University

Subject/Index Terms

Filing Info

  • Accession Number: 01144417
  • Record Type: Publication
  • ISBN: 9780982014400
  • Files: TRIS
  • Created Date: Nov 13 2009 5:21PM