DISCUSSION OF BEHAVIOR OF SINGLE MINERAL SOILS IN TRIAXIAL SHEAR

A NEW HYPOTHESIS ON BONDING AND EFFECTIVE STRESSES IN SOILS WAS PROPOSED BY MITCHELL ET AL. IN AN ATTEMPT TO UNIFY THE STRENGTH DEVELOPMENT MECHANISM FOR SANDS AND CLAYS. THIS HYPOTHESIS WAS EMPLOYED BY KOERNER IN HIS PAPER ON THE SHEAR BEHAVIOR OF SOIL AND IN AN EARLIER PAPER ON THE EFFECT OF PARTICLE CHARACTERISTICS ON SOIL STRENGTH. SUCH STUDIES ARE DIFFICULT IN THE ABSENCE OF NATURAL SOILS HAVING THE DESIRED CHARACTERISTICS, BUT THE WRITER CONSIDERS THE CRITICISM LEVELLED AT THE USE OF ARTIFICIALLY PREPARED SOILS TO BE NOT ENTIRELY COGENT. IN SUPPORT OF KOERNER, THE WRITER PRESENTS DATA ON SOME STUDIES HE CONDUCTED ON ALLUVIAL ORGANIC CLAY TO DETERMINE THE EFFECT OF PARTICLE CHARACTERISTICS ON SHEAR STRENGTH. THE FINDINGS OF THE WRITER ARE GENERALLY IN ACCORD WITH THOSE OF THE AUTHOR, WITH TWO EXCEPTIONS. THE CONCLUSION OF THE AUTHOR THAT THE SURFACE AREA AND SURFACE ENERGY OF THE PARTICLES MIGHT OFFER AN EXPLANATION FOR THE DIFFERENCES IN FRICTION ANGLE FOR DRY AND SATURATED SOILS APPEARS INSUFFICENTLY SUBSTANTIATED. ALSO, WHILE THE WRITER AGREES THAT THE MAJOR REORIENTATION TAKES PLACE AT SMALL STRAINS AND LOW DENSITIES (ALTHOUGH IT IS ONLY THE ROTATION THAT CONTRIBUTES TO INCREASED STRENGTH IN THIS REGARD), THE AUTHOR'S INTERPRETATION THAT, BECAUSE THE TERMINAL ORIENTATION OF THE PARTICLES WAS HORIZONTAL IN THE CASE OF FLAKY MINERAL THERE IS A STRENGTH CONTRIBUTION FOR PARTICLE REORIENTATION, NEEDS CLOSER EXAMINATION.

  • Supplemental Notes:
    • Vol 97, No SM3, PP 593-595
  • Discussers:
    • Ramanatha, Iyer T S
  • Publication Date: 1971-3

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Filing Info

  • Accession Number: 00235934
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 8 1971 12:00AM