EFFECTIVE STRESS THEORY OF SHRINKAGE PHENOMENA

THE VARIOUS FACTORS EFFECTING SHRINKAGE PHENOMENA ARE DISCUSSED, AND THE THEORETICAL AND EXPERIMENTAL STUDIES OF THE PHYSICAL MECHANISM INVOLVED IN THE SHRINKAGE OF A CLAY SOIL ARE DEALT WITH. THE RELATIVE IMPORTANCE OF THE DIELECTRIC CONSTANT (IN EFFECTING THE ELECTRICAL ATTRACTIVE AND REPULSIVE FORCES) AND THE SURFACE TENSION ON THE SHRINKAGE OF A CLAY HAS BEEN BROUGHT OUT, USING VARIOUS ORGANIC SOLVENTS AS PORE FLUIDS. KAOLINITE HAS BEEN USED IN THE EXPERIMENTAL INVESTIGATION WHICH INCLUDES CONVENTIONAL SHRINKAGE LIMIT TESTS, TESTS ON SAMPLES CONSOLIDATED TO 1 TON/SQUARE FT. (1.093 KG/SQUARE CM) WITH DIFFERENT FABRIC AS WELL AS THE SAME INITIAL FABRIC, TESTS ON SAMPLES CONCOLIDATED TO DIFFERENT PRESSURES, AND TESTS ON SAMPLES WITH CONSTANT EXTERNAL APPLIED PRESSURE. THE EXPERIMENTAL RESULTS REVEAL THAT A MODIFIED EFFECTIVE STRESS CONCEPT PROPOSED GOVERNS THE SHRINKAGE PHENOMENA. THOUGH SURFACE TENSION IS BELIEVED TO BE THE CAUSE OF SHRINKAGE, IT HAS BEEN SHOWN THAT THE VOID RATIO AT THE SHRINKAGE LIMIT IS GOVERNED BY THE CONTACT STRESS AT PARTICLE CONTACT AND (OR) BETWEEN PARTICLES, AS DEFINED BY THE MODIFIED EFFECTIVE STRESS CONCEPT. THE ROLE OF FABRIC AND EXTERNALLY APPLIED LOAD ON SHRINKAGE IS DISCUSSED. /RATAOC/

  • Supplemental Notes:
    • Vol 8, No 4, PP 503-13, 4 FIG, 2 TAB, 28 REF
  • Authors:
    • Sridharan, A
    • Rao, G V
  • Publication Date: 1971-11

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Filing Info

  • Accession Number: 00233884
  • Record Type: Publication
  • Source Agency: Roads & Transportation Assoc /Canada
  • Files: TRIS
  • Created Date: Apr 8 1973 12:00AM