STRENGTH LOSS IN LIME-STABILIZED CLAY SOIL WHEN MOISTENED AND EXPOSED TO FREEZING AND THAWING

A TOTAL OF 216 SPECIMENS WAS COMPACTED, USING THE HARVARD MINIATURE APPARATUS, WITH SPECIMENS DIVIDED BETWEEN 2 TEST PROCEDURES (OPEN AND CLOSED) AND 2 LEVELS OF LIME ADDITION (0 AND 10 PERCENT). CURING WAS AT 120 F FOR 2 DAYS WHILE SEALED IN ALUMINUM FOIL. HALF OF THE 108 OPEN-SYSTEM SPECIMENS WERE PLACED IN A 70 F, 100 PERCENT HUMIDITY ENVIRONMENT FOR 5 DAYS BEFORE TESTING. ALL OPEN SYSTEM SPECIMENS WERE ALLOWED TO ABSORB MOISTURE WHILE FREEZING AT 0 F FOR 12 HR AND THAWING IN THE 70 F, 100 PERCENT HUMIDITY ENVIRONMENT FOR 12 HR. UNCONFINED COMPRESSIVE STRENGTH, MOISTURE ADSORPTION, LENGTH CHANGES, DEGREES OF SATURATION, AND POROSITIES WERE DETERMINED AT ZERO, 1, 3, OR 5 CYCLES OF FREEZING AND THAWING. HALF OF THE CLOSED-SYSTEM SPECIMENS WERE SOAKED IN WATER FOR 24 HR BEFORE TESTING. ALL SPECIMENS WERE FROZEN AND THAWED 12 HR EACH UNDER THE SAME CONDITIONS AS THE OPEN SYSTEM SPECIMENS EXCEPT FOR BEING SEALED IN ALUMINUM FOIL. RESULTS WERE OBTAINED AT ZERO, 1, 5, OR 20 CYCLES. RESULTS OF THE STUDY INDICATED THAT /1/ THE STRENGTHS OF ALL LIME-STABILIZED SPECIMENS, WHETHER OR NOT EXPOSED TO FREEZING AND THAWING, ARE SEVERAL TIMES GREATER THAN THE STRENGTHS OF NONSTABILIZED SPECIMENS, /2/ MOISTURE TREATMENTS PRIOR TO FREEZING AND THAWING GREATLY INCREASED STRENGTH LOSSES AFTER FREEZING AND THAWING, /3/ MOST STRENGTH LOSS OCCURRED DURING THE FIRST CYCLE OF FREEZING AND THAWING; AND /4/ FREEZING AND THAWING SEEMED TO HAVE LITTLE, IF ANY, EFFECT ON POROSITY. /AUTHOR/

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 1-8
  • Monograph Title: Stabilized soils: mix design and properties
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00231028
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:41AM