First-exposure performance of the bentonite component of a GCL in a low-pH, calcium-enriched environment
- West Virginia Univ., Morgantown, WV (United States). Dept. of Civil and Environmental Engineering
- Univ. of Texas, Austin, TX (United States). Dept. of Civil Engineering
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.
- OSTI ID:
- 543570
- Report Number(s):
- CONF-9601137-; ISBN 0-8031-2471-6; TRN: IM9748%%185
- Resource Relation:
- Conference: Symposium on testing and acceptance criteria for geosynthetic clay liners, Atlanta, GA (United States), 29 Jan 1996; Other Information: PBD: 1997; Related Information: Is Part Of Testing and acceptance criteria for geosynthetic clay liners; Well, L.W. [ed.]; PB: 279 p.; ASTM special technical publication 1308
- Country of Publication:
- United States
- Language:
- English
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