ACCELERATION OF LIME-CLAY REACTIONS WITH SALT. DISCUSSION

IN A DISCUSSION OF THE SUBJECT IT IS NOTED THAT LIQUID LIMIT VALUES OF SOILS TREATED WITH CALCIUM HYDROXIDE OR SODIUM HYDROXIDE REFLECTED CHANGES IN PH WHEN TESTED OVER A PERIOD OF 2 YEARS. THE SOILS UTILIZED IN THE STUDY WERE PREDOMINANTLY CALCIUM SOILS I.E., THE PRIMARY ABSORBED ION IN THESE SOILS WAS CALCIUM. TREATMENT OF THESE SOILS WITH SODIUM CHLORIDE PRODUCED NO SHORT-TIME ELEVATION OF PH. ALKALIES HAVE BEEN SHOWN TO HAVE THE ABILITY TO EXTRACT SILICA FROM CLAY MINERALS. THE LIKELIHOOD OF SODIUM CHLORIDE TO AFFECT THE AMORPHOUS SILICA IN THE CLAY NUMERALS, IS REGARDED AS AN ALTERATION OF THE BASIC CLAY MINERALS IN THE SOIL. ALTHOUGH IT IS RECOGNIZED THAT DIFFERENTIAL THERMAL ANALYSIS MUST BE SUPPORTED BY X-RAY DIFFRACTION AND CHEMICAL ANALYSIS TO PERMIT POSITIVE IDENTIFICATION OF CLAY MINERALS AND MINERALS FORMED THROUGH POSSOLANIC REACTIONS, TO DO THIS WAS NOT WITHIN THE SCOPE OF THIS STUDY. SODIUM CHLORIDE PERCENTAGES WERE ESTABLISHED ON THE BASIS OF BENEFICIAL EFFECTS OBTAINED. ALTHOUGH THE EFFECTS OF SODIUM CHLORIDE ON LIME SOIL MIXTURES WERE FOUND TO BE CATALYTIC IN NATURE, IT MAY NOT ACT AS A CATALYST SINCE THERE WAS NO EVIDENCE OF FREE SODIUM CHLORIDE AFTER SOIL-ADDITIVE REACTIONS HAD OCCURRED. TRACE ADDITIVES FOR THE ENHANCEMENT OF SOIL-LIME MIXTURES IS CONSIDERED A PROMISING FIELD FOR INVESTIGATION.

  • Authors:
    • Marks, B D
    • Haliburton, T A
  • Publication Date: 1973-11

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Filing Info

  • Accession Number: 00233452
  • Record Type: Publication
  • Report/Paper Numbers: Tech Notes
  • Files: TRIS
  • Created Date: Apr 3 1974 12:00AM