EFFECTS OF SALT CONTENT IN THIXOTOPIC BEHAVIOR OF A COMPACTED CLAY

VARIOUS AMOUNTS OF SALT (SODIUM CHLORIDE) WERE ADDED TO THE CLAY TO STUDY THE EFFECTS OF SALT ON COMPACTION, STRENGTH AND THIXOTROPIC CHARACTERISTICS OF THE CLAY. AN INCREASE IN SALT CONTENT IN THE COMPACTED BANGKOK CLAY RESULTED IN AN INCREASE IN DRY UNIT WEIGHT ON THE DRY SIDE OF OPTIMUM, AN INSIGNIFICANT CHANGE IN DRY UNIT WEIGHT ON THE WET SIDE OF OPTIMUM, AND A REDUCTION IN THE COMPRESSIVE STRENGTH WHEN COMPACTED ON THE WET SIDE OF OPTIMUM. THE EFFECT OF SALT CONTENT ON THE THIXOTROPIC CHARACTERISTICS PROVIDED ADDITIONAL EXPERIMENTAL EVIDENCE IN SUPPORT OF MITCHELL'S HYPOTHESIS. THE RESULTS INDICATED THAT THE MAXIMUM THIXOTROPIC STRENGTH INCREASE OCCURRED AT THE MAXIMUM EXCESS INTERNAL ENERGY, WHICH RESULTED FROM THE SHEAR STRAINS INDUCED BY THE COMPACTION PROCESS. THE MAGNITUDES OF THE SHEAR STRAINS WERE, IN TURN, DEPENDENT UPON THE SOIL STRUCTURE. FROM THE TEST RESULTS IT IS POSTULATED THAT THE MAIN FACTORS INFLUENCING THE SOIL STRUCTURE ARE APPLIED EXTERNAL STRESSES, INTERPARTICLE CONTACTS, AND PHYSICAL INTERFERENCE BETWEEN THE PARTICLES. THE SHORT RANGE INTERPARTICLE FORCES ARE NECESSARILY CONSIDERED ALONG WITH THE LONG RANGE INTERPARTICLE FORCES. /AUTHOR/

  • Authors:
    • Sambhandharaksa, S
  • Publication Date: 0

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  • Accession Number: 00238236
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: Oct 9 1973 12:00AM