TEMPERATURE EFFECTS ON THE UNCONFINED SHEAR STRENGTH OF SATURATED, COHESIVE SOIL

TEMPERATURE-CONTROLLED, UNDRAINED AND UNCONFINED COMPRESSION TESTS WERE CONDUCTED ON RECONSTITUTED CLAY. THE RECONSTITUTED CLAY STUDIED, ONE-HALF CHAMPION AND ONE-HALF CHALLENGER (KNOWN BY ITS TRADE NAME AS C & C), HAD PREVIOUSLY DEMONSTRATED A LINEAR RELATIONSHIP BETWEEN THE LOGARITHM OF SHEAR STRENGTH AND MOISTURE CONTENT AT ROOM TEMPERATURE. THE EXPERIMENTS WERE AIMED TOWARD STUDYING THE EFFECT OF TEMPERATURE ON THIS RELATIONSHIP. THE SAMPLES WERE CONSOLIDATED AT ROOM TEMPERATURE AND WERE FAILED IN UNDRAINED, UNCONFINED COMPRESSION AT TEMPERATURES OF 75, 100, 125, AND 150 F. THE RESULTS INDICATE THAT, FOR A SOIL OF CONSTANT MOISTURE CONTENT, AN INCREASE IN TEMPERATURE CAUSES A REDUCTION IN SHEAR STRENGTH, AND FOR THE SAME TEMPERATURE DIFFERENCE, THE ABSOLUTE REDUCTION IN THE ORIGINAL STRENGTH INCREASES AS THE INITIAL MOISTURE CONTENT OF THE SOIL DECREASES. THE RELATION BETWEEN THE LOGARITHM OF SHEAR STRENGTH AND MOISTURE CONTENT APPEARS TO BE LINEAR FOR CONSTANT TEMPERATURE OVER THE RANGE OF TEMPERATURES TESTED. TWO DIFFERENT EQUATIONS DESCRIBING THE SHEAR STRENGTH OF THE CLAY AS A FUNCTION OF BOTH MOISTURE CONTENT AND TEMPERATURE ARE PROPOSED. THE FIRST RELATES AN INCREASE IN TEMPERATURE TO AN EQUIVALENT INCREASE IN MOISTURE CONTENT BY AN EXPERIMENTALLY DETERMINED FACTOR. THE SECOND RELATES THE DECREASE IN STRENGTH TO THE RATIO OF ABSOLUTE REFERENCE AND TEST TEMPERATURES AND TO THE DENSITIES OF THE PORE FLUID CORRESPONDING TO THESE TEMPERATURES. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 267-272
  • Monograph Title: Effects of temperatures and heat on engineering behavior of soils
  • Serial:

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Filing Info

  • Accession Number: 00237772
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Aug 25 1994 12:00AM