Advertisement

Clay chemistry — colloidal chemistry

  • R. Söderblom
Colloids
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 76)

Abstract

The changes in properties and behaviour of clays when exposed to the influence of various substances are known to a very limited extent, in particular with regard to clays in undisturbed condition. Most of the colloid chemical laws established for diluted colloid solutions are unsuitable for explaining the behaviour of undisturbed clays. Thus the Schultze-Hardy rule for predicting colloid stability when adding electrolytes, and which has hitherto been regarded as a background for different stabilizing processes, is not valid for undisturbed clays. One important factor in this connection is the clay structure. Experiments have been carried out to establish a clay structure by means of dielectric dispersion, comparing clays with artificial lamellar model systems. The investigations of the undisturbed clays were carried out both in the laboratory on extract samples and in situ by pumping different chemicals into the ground with subsequent sampling. It was found that rheopexy occurred in some clays and caused difficulties in mesuring the strength properties. Model studies of rheopexy were carried out. Various experiments regarding the importance of the double layer for stability properties were also initiated.

Key words

Clay colloid stability clay structure model systems infiltration experiments electric double layer 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Verwey EJW, Overbeek JThG (1948) Theory of the Stability of Lyophobic Colloids. Elsevier, New YorkGoogle Scholar
  2. 2.
    Langmuir I (1938) J Chem Phys 6:873CrossRefGoogle Scholar
  3. 3.
    Lambe TW (1958) Proc Am Soc Civ Eng 84:1654Google Scholar
  4. 4.
    Moum J, Löken T, Torrance JK (1971) Géotechnique 21:329CrossRefGoogle Scholar
  5. 5.
    Woo SM, Moh ZC (1977) Proc 9th Intern Conference Soil, Mech Found Engng, Special session 11, MAA Publishing Company, Taipei, 451:464Google Scholar
  6. 6.
    Jerbo A (1972) Stat Järnv Centralf Geot Kontoret Medd 28Google Scholar
  7. 7.
    Aylmore L, Quirk JP (1960) Nature, London 187:1046CrossRefGoogle Scholar
  8. 8.
    Olsen HW (1962) Proc 9th Nat Conf Clays Clay Miner 19:131–161Google Scholar
  9. 9.
    Stepkowska ET (1982) Arch Hydrotechn 29:469Google Scholar
  10. 10.
    Söderblom R, Sandelin CJ, Thornér K, Sjöblom J, Lundström I (1984) Proc Nord Geot m 1984, Swedish Geotechnical Institute, Linköping, 2:949–955Google Scholar
  11. 11.
    Adestam L (1981) Proc 10th Int Conf Soil Mech Found Eng, Belkema A A, Rotterdam 2:413–418Google Scholar
  12. 12.
    Madshus PA, Janbu N (1984) Proc Nord Geot m 1984, Swedish Geotechnical Institute, Linköping 2:921–930Google Scholar
  13. 13.
    Chen Y, Schnitzer M (1978) Soil Sci 125:7CrossRefGoogle Scholar
  14. 14.
    Letey J, Osborn J, Pelishek RE (1962) Soil Sci 93:149CrossRefGoogle Scholar
  15. 15.
    Jirgensons B, Straumanis ME (1962) A short textbook of colloid chemistry. Pergamon Press, New YorkGoogle Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1988

Authors and Affiliations

  • R. Söderblom
    • 1
  1. 1.Swedish Geotechnical InstituteLinköpingSweden

Personalised recommendations