Advertisement

Clays and Clay Minerals

, Volume 14, Issue 1, pp 271–287 | Cite as

Quantitative Fabric of Wet Kaolinite

  • R. Torrence Martin
General

Abstract

A method is described for quantitatively expressing orientation of kaolinite particles in a wet clay mass. Wet clay is impregnated with a polyalcohol which permits grinding of a very flat surface (without disrupting the original fabric) for quantitative X-ray measurement. In the specific procedure discussed, a Norelco diffractometer equipped with a pole figure device and a Geiger detector was employed to measure by reflection the diffracted intensity of the 002 and 020 kaolinite reflections. The amplitude of the 002 peak to the amplitude of the 020 peak is called the peak ratio, PK, which quantitatively expresses particle orientation at any chosen angle to the specimen surface. Limits of orientation are random and maximum orientation. For the kaolinite tested, truly random orientation was achieved which gave a PR = 2.0. Maximum orientation found experimentally was PR = 200 for thoroughly dispersed slurry slowly dried on a glass slide. Vertical and lateral variations can be measured either continuously or in steps of any chosen size.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Brindley, G. W. (1953) An X-ray method for studying orientation of micaceous minerals in shales, clays, and similar materials: Min. Mag. 30, 71–78.Google Scholar
  2. Brindley, G. W., and Kurtossy, S. S. (1961) Quantitative determination of kaolinite by X-ray diffraction: Amer. Min. 46, 1205–15.Google Scholar
  3. Hayes, J. B. (1963) Kaolinite from Warsaw geodes, Keokuk region, Iowa: Iowa Acad. Sci. 70, 261–72.Google Scholar
  4. Mitchell, J. K. (1956) The fabric of natural clays and its relation to engineering properties: Proc. High. Res. Bd. 35, 693–713.Google Scholar
  5. Raitburd, C. M. (1958) The use of X-ray structural analysis in the study of the crystal-lographic orientation of clay minerals: Conf. on Research Use Clays, May–June 1957, 779–94; Translation by Alice A. Parcel, U.S.G.S., Menlo Park, California.Google Scholar
  6. Raitburd, C. M. (1960) Study of microstructure of clay by the X-ray method: Akad. Nauk. CCCR, Kom no Izucheniyer Glin Otdel. Geol.-Geograf. Nauk., 108–17; Translation by Alice A. Parcel U.S.G.S., Menlo Park, California.Google Scholar

Copyright information

© Clay Minerals Society 1966

Authors and Affiliations

  • R. Torrence Martin
    • 1
  1. 1.Department of Civil Engineering Massachusetts Institute of TechnologySoil Mechanics LaboratoryCambridgeUSA

Personalised recommendations