You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.


    First-Exposure Performance of the Bentonite Component of a GCL in a Low-pH, Calcium-Enriched Environment

    Published: Jan 1997

      Format Pages Price  
    PDF (252K) 16 $25   ADD TO CART
    Complete Source PDF (4.9M) 16 $55   ADD TO CART


    Testing was conducted on the bentonite portion of a Geosynthetic Clay Liner (GCL) for application to an environment characterized as having high concentrations of dissolved calcium ions. This environment presents conditions that might affect the long-term hydraulic function of the GCL as a component in a barrier system. Experiments were conducted to investigate first-exposure compatibility of a sodium bentonite GCL subject to the affects of acidic groundwater and second from the combined affects of acidic groundwater enriched with calcium. Relationships between the ionic exchange of sodium, potassium, magnesium and calcium species in the bentonite, and changes in hydraulic conductivity and electrical conductance are reported and discussed.


    geosynthetic clay liner, hydraulic conductivity, ion exchange, bentonite, cation exchange capacity

    Author Information:

    Quaranta, JD
    Engineering Scientist, West Virginia University, Morgantown, WV

    Gabr, MA
    Associate Professor, West Virginia University, Morgantown, WV

    Bowders, JJ
    Research Civil Engineer and Senior Lecturer, University of Texas, Austin, TX

    Committee/Subcommittee: D35.04

    DOI: 10.1520/STP11801S

    CrossRef ASTM International is a member of CrossRef.