STABILIZATION OF CONTAMINATED CLAYS

THE OBJECTIVE OF THIS STUDY WAS TO DETERMINE THE EFFECTS OF VARIOUS CHLORIDE AND SULFATE SALTS OF COMMONLY OCCURRING SOIL CATIONS ON THE UNCONFINED COMPRESSIVE STRENGTH OF NATURAL, LIME-TREATED, AND CEMENT-TREATED CLAY MINERALS. WITH ONE EXCEPTION, THE PRESENCE OF CHLORIDE AND SULFATE SALTS IN THE NATURAL CLAY MINERALS-KAOLINITE, ILLITE, AND MONTMORILLONITE-RESULTED IN LOWER COMPRESSIVE STRENGTHS. ONLY THE ILLITE-SULFATE SALT ADMIXTURE PRODUCED GREATER STRENGTHS, THE INCREASE BEING AN AVERAGE OF 10 PSI. AN INCREASE IN THE PERCENTAGE OF CHLORIDE OR SULFATE SALT ADDED TO THE NATURAL CLAY MINERALS RESULTED IN A CORRESPONDING DECREASE IN STRENGTH. THE ADDITION OF SALTS TO THE LIME- TREATED CLAY MINERALS PRODUCED VARIED REACTIONS. LIME-SALT- TREATED ILLITE AND MONTMORILLONITE DEVELOPED STRENGTHS GREATER THAN THOSE OF THE MINERALS TREATED WITH LIME ALONE; WHILE LIME-SALT-TREATED KAOLINITE UNDERWENT A DECREASE IN STRENGTH. VARIED REACTIONS ALSO OCCURRED WITH THE ADDITION OF SALTS TO THE CEMENT-TREATED CLAY MINERALS. FOR KAOLINITE AND ILLITE THE RESULTANT STRENGTHS SURPASSED THOSE OF THE MINERALS TREATED WITH CEMENT ALONE. HOWEVER, MONTMORILLONITE SHOWED A DECREASE IN STRENGTH. NO DISTINCT TRENDS WERE NOTED FOR ANY ONE CATIONIC SALT. /AUTHOR/

  • Corporate Authors:

    Construction Engineering Research Laboratory

    Army Corps of Engineers, P.O. Box 4005
    Champaign, IL  United States  61820
  • Authors:
    • Aufmuth, R E
  • Publication Date: 1972-6

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 9 p.
  • Serial:
    • Issue Number: 9

Subject/Index Terms

Filing Info

  • Accession Number: 00233314
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 15 1973 12:00AM