Geosynthetic Clay Liner (GCL)
nounPronunciation: /ˌdʒiːoʊˌsɪnˈθɛtɪk ˈkleɪ ˈlaɪnər/
A manufactured composite material combining a clay layer between geotextile fabrics, used as an impermeable barrier in reclamation applications to prevent contaminant migration. GCLs provide a cost-effective alternative to compacted clay liners with superior hydraulic performance.
Plain English
A factory-made waterproof barrier using clay sandwiched between fabric layers.
Etymology & History
Usage
"The reclamation design specified a geosynthetic clay liner beneath the newly graded tailings surface to prevent seepage."
Style guide notes: Abbreviation GCL widely accepted; always specify material composition (bentonite-based vs. other) when comparing products.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How does a GCL work in mine reclamation?
GCLs use bentonite clay's swelling properties to create a self-healing, impermeable seal preventing groundwater contamination from tailings.
What advantages do GCLs offer over natural clay liners?
GCLs provide faster installation, consistent quality control, better compression resistance, and superior hydraulic conductivity compared to compacted clay.
Why Test Candidates on This?
GCL selection and application are critical in mine closure design and containment system engineering for reclamation projects.
Required skill level: Mid