A STUDY OF ABSORBED WATER ON CLAY BY STEADY STATE NUCLEAR MAGNETIC RESONANCE

THE CONCEPT OF WATER FILM STRENGTH REPORTED BY TERZAGHI IS SUMMARIZED AS FOLLOWS: (1) AN ABSORBED FILM OF STRONGLY ORIENTED WATER MOLECULES IS FIRMLY BOUND TO THE CLAY SURFACE, (2) THE WATER MOLECULE ORIENTATION EXTENDS FOR SOME DISTANCE INTO INTERPARTICLE WATER, AND (3) THE ORIENTED WATER MOLECULES RESIST DEORIENTATION AND THIS RESISTANCE TO DEORIENTATION IS A SIGNIFICANT PART OF THE SHEAR STRENGTH OF A WET CLAY SOIL. OPPOSING THE DEVELOPMENT OF ORIENTATION IS THE BROWNIAN MOVEMENT WHICH IS DESCRIBED. STEADY STATE NUCLEAR MAGNETIC RESONANCE (NMR) MEASURES TWO RELAXATION TIMES. THIS NONDESTRUCTIVE TECHNIQUE MEASURES WATER FILM STRENGTH DIRECTLY. CLAYS OF WELL-KNOWN PROPERTIES WERE PREPARED AND TESTED BY NMR. IT IS CONCLUDED THAT THE MAJOR BONDING FORCES IN CLAYS ARE OTHER THAN WATER FILM STRENGTH. THE LITHIUM MONTMORILLONITE, AFTER HEATING, HAS NO INTRALAYER WATER. THE SILANED CLAY HAS INTRALAYER WATER, BUT HAS NO EXTERIOR WATER FILM. NO DIFFERENCE WAS OBSERVED IN MODE OR ENERGY OF BONDING BETWEEN THE TWO SYSTEMS.

Media Info

  • Monograph Title: Discussions on Water and Its Conduction in Soils
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00235362
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 16 1994 12:00AM