DEFLOCCULATING AGENTS FOR MECHANICAL ANALYSIS OF SOILS

SOIL SAMPLES FROM DIFFERENT PARTS OF THE UNITED STATES WERE USED IN MECHANICAL ANALYSIS EXPERIMENTS FOR COMPARING THE EFFECTIVENESS OF SEVERAL CHEMICALS AS DEFLOCCULATING AGENTS. SODIUM METAPHOSPHATE WAS FOUND MOST PROMISING. SINCE DIFFERENT VARIETIES OF THIS CHEMICAL ARE MANUFACTURED, EXPERIMENTS WERE CONDUCTED TO EVALUATE COMPOUNDS AVAILABLE THROUGH CHEMICAL SUPPLY HOUSES. THE RECOMMENDED COMPOUND WAS FURTHER STUDIED TO DETERMINE THE EFFECT OF AMOUNT AND AGE OF THE DEFLOCCULATING SOLUTION USED ON EFFICIENCY OF DISPERSION. EXPERIMENTS WERE ALSO PERFORMED TO DETERMINE THE CHANGE IN VISCOSITY AND DENSITY OF A SOIL SUSPENSION DUE TO THE USE OF SODIUM METAPHOSPHATE. THE VISCOSITY OF THE SOIL SUSPENSION IN THE STANDARD METHODS OF MECHANICAL ANALYSIS IS ASSUMED TO BE THAT OF WATER. VISCOSITY MEASUREMENTS IN THIS STUDY INDICATE THAT CORRECTION FACTORS FOR THE INFLUENCE OF BOTH THE DEFLOCCULATING AGENT AND SOIL FINES ARE DESIRABLE. THE EFFECT OF SODIUM METAPHOSPHATE ON THE DESNITY OF THE SOIL SUSPENSION WAS ALSO FOUND TO BE APPRECIABLE, AND A METHOD FOR DETERMINING A CORRECTION FACTOR IS PRESENTED. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/95/95-002.pdf
• Supplemental Notes:
  • No 95, pp 15-26, 4 FIG, 9 TAB, 9 REF, APP Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Chu, T Y
  • Davidson, D T
• Publication Date: 1955

Language

• English

Media Info

• Monograph Title: Laboratory analysis of soils: grain size and liquid limit
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 95
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Chemical analysis; Density; Measurement; Mechanical analysis; Phosphates; Sampling; Sodium compounds; Soil chemistry; Soils; Suspended sediments; Viscosity
• Old TRIS Terms: Deflocculants; Dispersion; Soil analysis; Soil sampling; Soil suspension
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00229623
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 15 2004 2:39AM