A TECHNIQUE FOR THE INVESTIGATION OF CLAY MICROSTRUCTURE

DETAILS ARE GIVEN OF A METHOD OF STUDYING CLAY MICROSTRUCTURE BASED ON THE IMPREGNATION OF SAMPLES AND MICROTOME CUTTING. SMALL SPECIMENS OF RAW CLAY ARE TREATED WITH ETHYL ALCOHOL, AND BUTYL-METHYL METHACRYLATE WHICH IS EVENTUALLY POLYMERIZED. THE WATER CONTAINED IN THE ORIGINAL SAMPLE IS REPLACED BY DIFFUSION MECHANISM. SAMPLES TREATED IN THIS WAY ARE SUFFICIENTLY HARD TO SUPPLY CUTTINGS APPROXIMATELY 500 A THICK. IN ORDER TO DETERMINE THE INFLUENCE OF THE PREPARATION METHOD ON CLAY TEXTURE, THE DIMENSIONS OF THE SAMPLE ARE ACCURATELY MEASURED DURING CHEMICAL TREATMENT. THE EFFECT OF SEVERAL SUBSTANCES USED FOR IMPREGNATION ARE COMPARED, AND A HIGH-VOLTAGE ELECTRON MICROSCOPE USED (THE 1, 5MV ELECTRON MICROSCOPE OF THE "LABORATOIRE D'OPTIQUE ELECTRONIQUE" IN TOULOUSE). THE HIGHLY PENETRATING POWER OF THE ELECTRONS FACILITATE THE STUDY OF SAMPLES IMPREGNATED WITH CARBO WAX AND THAT OF SAME SAMPLES IN THE PRESENCE OF WATER. A COMPARISON OF THE NEGATIVES OBTAINED SHOWS THAT ACRYLIC TREATMENT HAS VERY LITTLE EFFECT ON THE CLAY TEXTURE (THE SAME CONCLUSION WAS REACHED AFTER OTHER TESTS). WITH REGARD TO THE EFFECTS OF THE MICROTOME, THEY ARE EASILY SEEN BY EXAMINATION OF MICROGRAPHIES. /A/LCPC/RRL/

  • Supplemental Notes:
    • Vol 6, No 7, PP 963-986, 8 FIG, 7 TAB, 16 PHOT, 8 REF
  • Corporate Authors:

    N/A

    ,   United States 
  • Authors:
    • Pusch, D R
  • Publication Date: 1967

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Filing Info

  • Accession Number: 00237553
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Nov 3 2003 12:00AM