SOIL STABILIZATION WITH LIME-FLY ASH MIXTURES: SPECIAL DISCUSSION

THE PAPER PRESENTED BY DR. T.Y. CHU AND ASSOCIATES IS DISCUSSED. IT IS POINTED OUT THAT IN CONNECTION WITH THE CURING OF THE LABORATORY SAMPLES IT IS OF DEFINITE BENEFIT TO INCLUDE IN THE PROGRAM CONDITIONS OF ALTERNATE WETTING AND DRYING CYCLES OR EVEN HIGH-LOW HUMIDITY CYCLES. IN CONNECTION WITH THE AUTHOR'S COMMENTS RELATED TO HIGH- TEMPERATURE CURING, LIME-FLY ASH REACTIONS ARE KNOWN TO PROCEED OVER LONG PERIODS OF TIME. A SUGGESTION IS MADE REGARDING COMTEMPLATED FREEZING AND THAWING STUDIES, NAMELY THAT CONSIDERATION BE GIVEN TO THE USE OF NONDESTRUCTIVE SONIC METHODS OF TESTS. A CLOSURE STATEMENT BRINGS OUT THE FOLLOWING DEVELOPMENTS: (1) ALTERNATE WETTING AND DRYING IN SOME CASES BENEFITS STRENGTH GAIN MORE THAN ORDINARY MOIST CURING, (2) LIME IS LESS SOLUBLE AT HIGH TEMPERATURES, AND RECRYSTALLIZATION OF LIME UNDOUBTEDLY ADDS TO STRENGTH, (3) RECENT RESEARCH HAS TRIED TO FURTHER MINIMIZE THE EFFECT FROM CARBONATION TO MORE CLOSELY DUPLICATE CONDITIONS IN A ROAD, AND (4) WORK INDICATES THAT HIGH TEMPERATURE CURING, WHILE HIGHLY DESIRABLE FROM THE STANDPOINT OF TIME, MAY OCCASIONALLY GIVE ERRONEOUS RESULTS. REFERENCES: T. Y. CHU, D. T. DAVIDSON, W. L. GEOCKER, AND Z. C. MOH, HIGHWAY RESEARCH BOARD BULLETIN NO. 108.

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  • Accession Number: 00232526
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:43AM