STP623

    Amelioration of Tunnelling Susceptible Soils in the Hunter Valley, New South Wales, by Modification of Clay Double-Layer Interactions

    Published: Jan 1977


      Format Pages Price  
    PDF (124K) 11 $25   ADD TO CART
    Complete Source PDF (8.0M) 11 $149   ADD TO CART


    Abstract

    The resultant force between van der Waals attraction and net free energy of interacting clay double layers has been calculated for a typical tunnelling susceptible soil in the Hunter Valley, N. S. W., Australia. Double-layer theory accounts adequately for the instability of this soil and for its response to wetting.

    Double-layer theory has been used to derive a sodium absorption ratio versus sum of cations stability diagram for this soil specimen. The slope of the line separating flocculation and dispersion approached seven.

    The soil was prepared with sodium and calcium chloride salts at different concentrations at and around the threshold of flocculation as predicted by double-layer theory. Aggregate stability, dispersal index, and behavior in model dams confirmed the predicted behavior

    Keywords:

    clays, soil stabilization, sodium


    Author Information:

    Elliott, GL
    Soil conservationist, Scone Research Center, Soil Conservation of New South Wales, Scone, N. S. W.


    Paper ID: STP26983S

    Committee/Subcommittee: D18.09

    DOI: 10.1520/STP26983S


    CrossRef ASTM International is a member of CrossRef.