SUMMARY REVIEWS OF SOIL STABILIZATION PROCESSES: MIXING PRINCIPLES, TECHNIQUES AND EQUIPMENT

A REVIEW OF MIXING AND MIXER DEVELOPMENT IS PRESENTED, WITH PARTICULAR REFERENCE TO THE ASPECTS OF THE PRINCIPLES AND TECHNIQUES INVOLVED THAT MAY LEAD TO MORE EFFICIENT PROCESSES FOR INCORPORATING POTENTIAL STABILIZING MATERIALS INTO WET, FINE-GRAINED SOILS. EXAMINATION OF MANY DIFFERENT TYPES OF SOIL STABILIZATION MIXING EQUIPMENT INDICATES THAT NEARLY ALL ARE DESIGNED FOR USE UNDER THE MOST FAVORABLE CONDITIONS OF SOIL TYPE AND MOISTURE CONTENT. NO SINGLE ITEM OF MIXING EQUIPMENT CURRENTLY EXISTS THAT IS CAPABLE OF EFFICIENT MIXING OF WET, PLASTIC, CLAY SOILS. AMONG THE MANY VARIABLES WHICH MAY INFLUENCE THE EFFICIENCY OF A SOIL STABILIZATION MIXER, THE MORE IMPORTANT APPEAR TO BE BLADE CONFIGURATION, SPEED AND DIRECTION OF ROTOR, FORWARD SPEED OF THE MIXING UNIT, NUMBER OF ROTORS, SOIL TYPE AND CONDITION, TYPE OF STABILIZING MATERIAL, AND DURATION OF MIXING. BASED ON THE RESULTS OF LABORATORY MIXING INVESTIGATIONS INVOLVING FINE-GRAINED SOILS, THE RHEOLOGICAL PROPERTIES OF A MIXTURE WERE DETERMINED TO HAVE THE MOST SIGNIFICANT EFFECT ON THE RAPIDITY AND EFFICIENCY OF MIXING. THE ULTIMATE STRENGTH AND, PERHAPS OF GREATER SIGNIFICANCE, THE VARIATION IN THE STRENGTH CHARACTERISTICS OF A STABILIZED-SOIL MASS ARE DEPENDENT UPON THE UNIFORMITY OF HOMOGENEITY ACHIEVED DURING THE MIXING PROCESS. CONTINUOUS- TYPE MIXERS EMPLOYING THE PRINCIPLES OF KNEADING AND SMEARING APPEAR TO BE THE MOST EFFECTIVE FOR WET, PLASTIC SOILS. /AUTHOR/

  • Supplemental Notes:
    • Misc Paper NO 3-122, VII & 33 PP, 40 REF
  • Corporate Authors:

    U.S. Army Waterways Experiment Station

    3909 Halls Ferry Road
    Vicksburg, MS  USA  39180-6199
  • Authors:
    • Freitag, D R
  • Publication Date: 0

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Filing Info

  • Accession Number: 00231171
  • Record Type: Publication
  • Source Agency: Clearinghouse Fed Sci & Tech Info
  • Files: TRIS
  • Created Date: Aug 15 2004 2:23AM