EFFECT OF FREEZING AND THAWING ON UNCONFINED COMPRESSIVE STRENGTH OF LIME-STABILIZED SOILS

THE EFFECT OF A CLOSED-SYSTEM FREEZING-AND-THAWING TEST ON THE CONFINED COMPRESSIVE STRENGTH OF A LIME-STABILIZED SILT AND A CLAY SOIL WAS THE OBJECT OF THIS STUDY. THE CLAY SOIL WAS CLASSIFIED AS A-7-5/18/ AND THE SILT SOIL AS A-5/8/. THE PERCENTAGES OF HYDRATED LIME USED WERE 0, 5 AND 10 BY DRY WEIGHT OF SOIL. ALL SPECIMENS WERE WRAPPED IN ALUMINUM FOIL, SEALED WITH PARAFFIN, AND CURED FOR 48 HR AT 120 F. IN ONE SERIES OF TESTS, THE SPECIMENS WERE FROZEN IN A STANDARD DEEP-FREEZE UNIT TO A TEMPERATURE OF 0 F AND THEN THAWED IN A 100 PERCENT HUMIDITY ROOM AT 70 F. ALL SPECIMENS WERE KEPT SEALED IN ALUMINUM FOIL UNTIL TESTED IN UNCONFINED COMPRESSION. THE COMPRESSION TESTS WERE RUN AT THE END OF 0, 5, AND 10 CYCLES OF FREEZING AND THAWING. IN A SECOND SERIES OF TESTS, AUTOMATIC EQUIPMENT WAS USED TO FREEZE AND THAW SPECIMENS ALTERNATELY BETWEEN 0 AND 40 F. THESE SPECIMENS WERE TESTED AT THE END OF 29 CYCLES OF FREEZING AND THAWING. RESULTS SHOWED THAT THE STRENGTH OF CLAY SOIL WAS GREATLY INCREASED BY THE ADDITION OF LIME BUT SUFFERED LARGE DECREASES IN STRENGTH WHEN EXPOSED TO FREEZING AND THAWING. THE STRENGTH OF THE SILT SOIL WAS AFFECTED VERY LITTLE BY THE ADDITION OF LIME OR BY ALTERNATE CYCLES OF FREEZING AND THAWING. WITH THE UNTREATED SOILS, THE CLAY LOST MOST OF ITS STRENGTH AFTER FREEZING AND THAWING, AND THE SILT LOST LITTLE OF ITS STRENGTH. ATTENTION IS GIVEN TO THE POSSIBLE ROLE OF AN ACTIVITY SIMILAR TO THAT DESCRIBED BY POWERS HYPOTHESIS FOR CONCRETE, TAKING PLACE IN THE STABILIZED SOIL DURING FREEZING AND THAWING. A DISCUSSION OF CLOSED-SYSTEM AND OPEN-SYSTEM TYPES OF FREEZING-AND-THAWING TESTS IS ALSO INCLUDED. /AUTHOR/

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  • Authors:
    • Walker, Richard D
    • Karabulut, Cetin
  • Discussers:
    • Mateos, Manuel
    • Anday, M C
    • Walker, Richard
    • Karabulut, Cetin
  • Publication Date: 1965

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 1-11
  • Monograph Title: Lime stabilization
  • Serial:

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Filing Info

  • Accession Number: 00237193
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 29 1994 12:00AM