THE DEVELOPMENT OF NON-HOMOGENOUS FLOW CONDITIONS DURING ELECTRO-OSMOSIS IN A SATURATED CLAY MATERIAL

THE POSSIBILITY OF DEVELOPING A NON-HOMOGENEOUS FLOW CONDITION BASED ON AN ANALYSIS OF THE CHARACTERISTICS OF THE ELECTRO-OSMOTIC SYSTEM IS DISCUSSED. THE ANALYSIS INDICATES THAT, DUE TO THE UNIQUE CHARACTERISTICS OF THE HYDROGEN ION IN AQUEOUS SOLUTION, ITS ELECTRO-OSMOTIC FLOW RATE PER UNIT OF CURRENT MAY BE LESS THAN THAT OF OTHER IONS IN THE CLAY WATER SYSTEM. THE ELECTRO-OSMOTIC FLOW RATE PER UNIT OF CURRENT IS PRESENTED FOR SEVERAL HOMO-IONIC MODIFICATIONS OF NORTH CAROLINA KAOLIN INCLUDING HYDROGEN. THE FLOW RATE FOR THE VARIOUS CATIONS IS IN ACCORD WITH THE FOLLOWING SEQUENCE: HYDROGEN: IRON: CALCIUM: SODIUM: ALUMINUM, WHEREIN EACH IS GREATER THAN ITS PREDECESSOR. THE CHANGE IN THE ELECTRO-OSMOTIC FLOW RATE DURING THE TRANSITION FROM A HYDROGEN TO A CALCIUM CLAY IS PRESENTED. DATA ARE PRESENTED TO SHOW THAT THE SURFACE CHARACTERISTICS OF AN HYDROGEN CLAY SATURATED WITH DISTILLED WATER CHANGE WITH TIME AND THAT THIS CHANGE IS INDICATED BY A GREATLY INCREASED ELECTRO- OSMOTIC FLOW RATE. THE EFFECT OF VARIOUS CONCENTRATIONS OF ALUMINUM CHLORIDE AND CALCIUM CHLORIDE ON THE ELECTRO- OSMOTIC FLOW RATE OF ALUMINUM OF AND CALCIUM CLAYS IS SHOWN. THESE RESULTS SHOW THAT A WIDE VARIATION IN THE ELECTRO- OSMOTIC FLOW RATE CAN OCCUR THROUGHOUT THE CLAY WATER SYSTEM DURING ELECTRO-OSMOSIS AND SUCH CONDITIONS OFFER AN EXPLANATION FOR SUCH PHENOMENA OCCURRING DURING ELECTRO- OSMOSIS SUCH AS THE DEVELOPMENT OF A MOISTURE GRADIENT, VOLUME CHANGE, AND CHANGES IN INTERGRANULAR STRESSES AND PORE PRESSURES. THESE DATA ALSO IMPLY THAT THE ELECTRO- OSMOTIC FLOW RATE FOR A SYSTEM MAY BE LIMITED TO THE FLOW RATE FOR A HYDROGEN SATURATED MATERIAL. /AUTHOR/

  • Supplemental Notes:
    • Vol 35, pp 686-692, 5 FIG, 2 TAB, 15 REF
  • Authors:
    • Rollins, R L
  • Publication Date: 1956

Media Info

  • Monograph Title: Proceedings of the Thirty-Fifth Annual Meeting of the Highway Research Board, Washington, D.C., January 17-20, 1956
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00237996
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 1971 12:00AM