Product
GCL (Geosynthetic Clay Liner)
A thin-section hydraulic barrier working with sodium bentonite placed between two geotextiles; replaces the clay layer in storage, mining pond and infrastructure containment projects.
Product Summary
Thin barrier alternative to compacted clay
GCL provides permeability at the level of ≤ 5×10⁻¹¹ m/s in a 6–10 mm cross-section thanks to sodium bentonite swelling upon hydration. The needle-punched bonded structure provides high internal shear strength, while its self-healing property seals minor damages occurring during deployment.
Structure
Bentonite-Based Geocomposite
Standard
ASTM D5887 / ASTM D6766
Thickness
6 – 10 mm (4000 – 6000 g/m²)
Width
40 – 5.00 m
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Technical Approach
GCL (Geosynthetic Clay Liner) technical specifications highlighting the product
GCL performance depends not only on the amount of bentonite, but also on the bonding method, hydration timing, and overburden loading sequence. When these parameters are not evaluated together, it becomes difficult to achieve the design permeability value.
Self-healing property
High swelling index sodium bentonite infill
less thickness compared to compacted clay
Self-healing is a critical advantage
Minor punctures occurring during deployment are sealed through the re-hydration of bentonite.
Product Structure
A structure meeting engineering requirements in a single product
The product consists of a bottom carrier geotextile, sodium bentonite granules in the middle layer, and a top cover geotextile. The needle-punching procedure builds fiber bridges between the two geotextiles to prevent bentonite displacement and maintains stability on sloped surfaces.
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High resistance to freeze-thaw cycles
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High internal shear strength via needle-punch bonding
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Rapid deployment and low weather dependence
Fields of Application
Solution tailored to industrial and environmental projects
Municipal solid waste and hazardous waste landfill liner systems
Mining tailings and solution ponds
Oil, petrochemical, and fertilizer lagoons
Highway, railway, and airport subgrade containment
Building foundation waterproofing and underground structures
Decorative ponds, water canals, irrigation reservoirs
Documents
Technical data sheets and corporate documents
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