POLYMER STABILIZED SOIL-CEMENT

THEORETICALLY THE USE OF POLYMERS IN SOIL-CEMENT HAS GREAT POTENTIAL. THE METHOD OF INCORPORATING POLYMERS INTO SOIL-CEMENT MATRIX MAY BE THE CRITICAL FACTOR. IF THE POLYMER IS FORMED IN SITU BY ADDING A MONOMER AND THEN EFFECTING A POLYMERIZATION, A DIFFICULT OPERATION ARISES IN OBTAINING HIGH MOLECULAR WEIGHT. USUALLY GAMMA IRRADIATION OR CURING OVENS ARE USED BUT BOTH ARE INCOMPATIBLE WITH CURRENT FIELD CONSTRUCTION PRACTICES. WHEN MONOMERS WERE USED HERE, CATALYSTS THAT ARE ACTIVE AT NORMAL TEMPERATURES WERE USED. HOWEVER, POLYMERIZATION DID NOT PROCEED TO THE REQUIRED EXTENT. THE ADDITION OF PREPOLYMERIZED POLYMER EITHER DISSOLVED IN WATER, OR AS A FINELY DISPOSED POWDER, LED TO UNDESIRABLE VISCOELASTIC RESISTANCE TO COMPACTION. THE FINAL COMPACTED DENSITY OF THE SPECIMENS WAS BELOW THE DENSITY OF THE SAMPLES CONTAINING NO POLYMER. A THIRD TECHNIQUE OF INCORPORATING THE POLYMER AS A LOW MOLECULAR WEIGHT OLIGOMER WHICH THEN REQUIRED A MINIMUM OF POLYMERIZATION TO OBTAIN POLYMER OFFERED THE MOST POTENTIAL. THE RESISTANCE TO COMPACTION COULD BE OFFSET BY CANCELLING OUT SOME OF THE NEGATIVE CHARGES ON THE SURFACE OF THE CLAY PARTICLES. THIS CHARGE NEUTRALIZATION WAS OBTAINED BY ADDING EITHER A MONOVALENT IONIZABLE CATION SUCH AS SODIUM HYDROXIDE OR BY USING A CATIONIC WETTING AGENT. WHEN THE LATTER APPROACH WAS USED THE RESULTING DENSITIES WERE EQUAL TO OR IN SOME CASES BETTER THEN THE BLANKS. /AUTHOR/

  • Corporate Authors:

    Louisiana State University and Agriculture & Mechanical College, Baton Rouge

    Baton Rouge, LA  United States  70803

    Louisiana Department of Highways

    P.O. Box 44245, Capitol Station
    Baton Rouge, LA  United States  70804

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Callihan, C
    • Armas, A
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00230741
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: 68-26
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Aug 8 1971 12:00AM