THE PREPARATION OF CLAY SOILS FOR DETERMINATION OF STRUCTURE

MOST METHODS FOR THE DETERMINATION OF STRUCTURE REQUIRE THE SOIL TO BE FULL OF WATER AND YET TO RETAIN ITS ORIGINAL CHARACTER. THE METHODS OF FREEZE-DRYING AND CRITICAL POINTDRYING ARE EXAMINED, AND IT IS CONCLUDED THAT THEY ARE NOT GENERALLY SATISFACTORY. IT IS POSSIBLE TO PRESERVE THE SOIL FABRIC WHILE WATER IS SLOWLY EXCHANGE WITH AN ORGANIC SOLVENT (E.G. METHANOL OR DIOXAN). THE FABRIC IS HARDENED AND THE DEGREE OF HARDENING IS INCREASED BY SUBSEQUENT EXCHANGE WITH CERTAIN WATER-IMMISCIBLE SOLVENTS (E.G. DIETHYL ETHER). SOME SHRINKAGE MUST BE TOLERATED WHEN IT IS DESIRED TO REMOVE THE LIQUID FROM THE FABRIC. THE BEST METHOD WAS FOUND TO BE INFILTRATION BY LIQUID CARBON DIOXIDE AND ITS REVOVAL ABOVE ITS CRITICAL TEMPERATURE. DESPITE SOME SHRINKAGE THE FABRIC SEEMS UNCHANGED. /AUTHOR/

Media Info

  • Features: References;
  • Pagination: p. 277-83
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00230376
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Jul 31 1974 12:00AM