PHOSPHORIC ACID IN SOIL STABILIZATION III. SOME PRACTICAL ASPECTS

OTHER EQUIPMENT AND PROCEDURES USED ARE DESCRIBED. THE BRABENDER PLASTOGRAPH WAS USED. IT IS A MIXING CHAMBER EQUIPPED TO MEASURE THE TORQUE ON THE MIXING SHAFT AS A FUNCTION OF TIME. PENETRATION TESTS MADE ON THE FIELD-TEST PATCHES WERE CONDUCTED WITH A SOIL TEST CN-419 PROCTOR PENETROMETER. CORROSION INHIBITORS USED WERE OBTAINED FROM SEVERAL COMPANIES. SIXTY-EIGHT TEST CYLINDERS WERE PREPARED REPRESENTING SOME 17 DIFFERENT CONDITIONS OF CHEMICAL TREATMENT OR MODE OF PREPARATION. MIXING ENERGY REQUIREMENTS WITH THE BRABENDER PLASTOGRAPH ARE DISCUSSED. THE IMPORTANCE OF MAINTAINING CLOSE CONTROL ON MOISTURE AS WELL AS DENSITY IS EMPHASIZED. THE EFFECT OF CORROSION INHIBITORS ON PERFORMANCE IS ANALYZED AND IT IS FOUND THAT CORROSION INHIBITORS HAD LITTLE EFFECT ON STABILIZED STRENGTH OR DRY DENSITY OF CLAY SOILS. RESULTS FOR THE PHOSPHORIC ACID TREATMENT SHOWED THAT STRAIGHT REAGENT-GRADE PHOSPHORIC ACID IS THE LEAST EFFECTIVE OF THE PHOSPHORIC ACIDS TESTED, ALTHOUGH IT IS SATISFACTORY AND GAINED STRENGTH WITH AGE, EVEN UNDER THESE EXPOSURE CONDITIONS. COSTS ARE GIVEN OF HYDROFLUORIC PHOSPHORIC ACID MIXTURE AT EQUAL PERFORMANCE LEVELS IN SILTY CLAY. IT IS CONCLUDED THAT THE TECHNICAL FEASIBILITY OF STABILIZING CLAY SOILS WITH PHOSPHORIC ACID HAS BEEN DEMONSTRATED CONCLUSIVELY. DURABILITY OF THE STABILIZED SOIL APPEARS TO BE GOOD. THIS METHODS SHOWS PROMISE OF BECOMING WIDELY ACCEPTED AS A MEANS OF STABILIZING FINE-GRAIN SOILS.

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  • Supplemental Notes:
    • No 318, pp 24-34, 7 FIG, 7 TAB, 1 REF Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Authors:
    • Lyons, J W
  • Conference:
  • Publication Date: 1962

Media Info

  • Monograph Title: Soil stabilization with phosphorus compounds and additives
  • Serial:

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Filing Info

  • Accession Number: 00231359
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:41AM