SWELLING STRAIN DEVELOPMENT IN SEDIMENTARY ROCK IN NORTHERN NEW YORK

SVAI S USHIRENNYM OSNOVANIEM V NABUKHAYUSHCHIKH GRUNTAKH

Unconfined swelling strains developed by sandstones, siltstones, shales, greywackes and interbedded rocks from the Oswego sandstone and Pulaski formation in northern New York state were monitored for periods of up to 150 days. Stratigraphy, mineralogy, test procedure and results of conventional "free swell" testing at constantly high environmental humidity are reported. Additional tests were conducted to investigate the influence of humidities of lower value, changes of humidity and humidity path upon sample performance. Known processes of swell and changes associated with sample extraction and testing are reviewed foundations for industrial structures in Kazakhstan. It is concluded that the samples swelled in response to a combination of several mechanisms. The factor of predominant influence upon the observed swelling strains was history of environmental humidity (humidity path), and the swelling is interpreted to have resulted largely from adsorption of water in response to negative pore pressures (suction) following the decrease of confining pressure associated with extraction. Relatively minor contributions are attributed to hydration of expanding clay minerals and progressive strain energy release. A need to measure the effect of pore air upon swelling pressures is emphasized. (a)

  • Availability:
  • Corporate Authors:

    Pergamon Press, Incorporated

    Headington Hill Hall
    Oxford OX30BW,   England 
  • Authors:
    • Harper, T R
    • Appel, G
    • Pendleton, M W
    • Szymanski, J S
    • TAYLOR, R K
  • Publication Date: 1979-10

Language

  • Russian

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00309622
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jul 22 1980 12:00AM