SOIL STABILIZATION EXPERIMENTS WITH PLASTIC RESINS (IN ENGLISH)

THE POSSIBILITIES FOR STABILIZING SILTY AND PURE SAND SOILS WITH SYNTHETIC RESINS HAVE BEEN INVESTIGATED IN THE LABORATORY AND HAVE BEEN REPORTED IN THE PAPER. A VARIETY OF SYNTHETIC RESIN COMPOUNDS AND CATALYTIC AGENTS WERE USED WITH ADMIXTURES RANGING FROM FIVE TO FIFTEEN PERCENT BY WEIGHT OF SOIL. THESE COMPOUNDS WERE (1) UREA RESIN WITH A FORMALDEHYDE RATIO OF 1 TO 1.5, (2) UREA RESIN WITH FORMALDEHYDE RATIO OF 1 TO 2, (3) MELANMINE RESIN WITH FORMALDEHYDE RATIO OF 1 TO 2.5, (4) MELANMINE RESIN WITH FORMALDEHYDE RATIO OF 1 TO 2.5 WHERE THE SOLIDS CONTENT OF THIS RESIN IS SLIGHTLY HIGHER THAN THAT OF THE PREVIOUS ONE. EXCEPT FOR THE LAST RESIN, ALL THE RESINS HAVE AN EXTREMELY LOW VISCOSITY NEARING THAT OF WATER. WITH THE ADDITION OF THE CATALYTIC AGENT, THE RESIN HARDENS AND ASSUMES A CELLULAR FOAM STRUCTURE. IN GENERAL IT IS SHOWN THAT THE COMPRESSIVE STRENGTH OF THE STABILIZED SOIL INCREASES WITH THE ADDITION OF ANY OF THE RESINS, AND INCREASES WITH INCREASING RESIN CONTENT BY WEIGHT OF SOIL. IT IS PERHAPS UNFORTUNATE THAT IN THE PLOTTING OF THE GRAPHS BY THE AUTHOR, POINTS HAVE BEEN EXTRAPOLATED TO ZERO RESIN COMPOUND COMPONENT WHICH SHOW THAT THE SOIL POSSESSES ZERO COMPRESSIVE STRENGTH WITH A ZERO PERCENT OF RESIN COMPOUND. THIS EXTRAPOLATION IS BY NO MEANS ADMISSIBLE. IT MUST BE POINTED OUT THAT THE MATERIAL STRUCTURE OF RESIN IS NOT CLEARLY UNDERSTOOD AS YET AND THEREFORE ANY APPRECIATION OF THEIR MATERIAL IMPROVEMENT CHARACTERISTICS MUST DEPEND UPON THE COLLECTION OF PHYSICAL MEASUREMENTS AND DATA. THE SUCCESSFUL APPLICATION OF RESINS FOR STABILIZATION IN WATERPROOFING OF SOILS IS SEEN TO BE INFLUENCED BY A NUMBER OF FACTORS, MOST IMPORTANT OF WHICH ARE THE GRAIN SIZE DISTRIBUTION OF THE SOIL, CONCENTRATION OF THE RESIN, THE PERIOD OF GEL FORMATION, AND THE PH VALUE OF THE MEDIUM IN WHICH THE HARDENING PROCESS TAKES PLACE. IN GENERAL IT IS SHOWN THAT HIGHER STRENGTH VALUES ARE OBTAINED IN FINER GRAIN SOILS. HOWEVER, WHEN THE SOIL FRACTION IN THE FINE RANGE REACHES THE FINE CLAY SIZE, THE GAIN IN STRENGTH IS REDUCED. CLAY CONTENTS EXCEEDING 3 PERCENT MAY PRODUCE AN APPRECIABLE LOSS IN STRENGTH. PH VALUES HIGHER THAN 7 OR 8 IN THE PORE FLUID WILL HAVE AN ADVERSE EFFECT ON BOTH THE GAIN IN STRENGTH AND WATERPROOFING. IN GENERAL, RESULTS SHOW THAT SYNTHETIC RESINS ARE SUPERIOR TO SODIUM SILICATE IN SOIL STABILIZATION BOTH AS FAR AS STRENGTH AND RANGE OF EFFECTIVENESS ARE CONCERNED. AT THE SAME TIME THE COST IN STABILIZATION ARE COMPARABLE TO THOSE OF THE METHODS INVOLVING THE USE OF SODIUM SILICATE. /AMR/

  • Supplemental Notes:
    • Vol 14, No 4, PP 621-637
  • Authors:
    • Petrasovits, G
  • Publication Date: 0

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  • Accession Number: 00232735
  • Record Type: Publication
  • Source Agency: Applied Mechanics Review
  • Files: TRIS
  • Created Date: Aug 15 2004 2:44AM