Product category
GCL Bentonite
Geosynthetic clay liners rely on the swelling and sealing behaviour of sodium bentonite placed between geotextiles for containment and waterproofing.
Main applications
- Landfill liners
- Ponds and reservoirs
- Civil engineering waterproofing
Product forms
- Granular
- Powder
Packaging options
- 25 kg bags
- Big bags (jumbo bags)
- Bulk supply on request
Technical data & laboratory analysis
Technical specifications
Bentonite used in GCL production is the mineral component that provides watertightness between geotextile layers. The natural sodium bentonite based product swells on contact with water to form a low-permeability barrier.
| Parameter | Target / reference |
|---|---|
| Bentonite type | Natural sodium bentonite |
| Swelling index | Min. 24 ml/2 g |
| Fluid loss | Max. 18 ml |
| Moisture | Per manufacturer and customer specification |
| Montmorillonite | To be determined by analysis |
| Grain size | Per GCL production process |
| Fineness | Per ASTM D5890 sample preparation |
Typical target values – subject to laboratory confirmation.
Key features & applications
- Landfills
- Waste storage areas
- Ponds and water channels
- Tunnels and underground structures
- Foundation and basement waterproofing
- Mining and environmental engineering
Recommended laboratory tests
ASTM D5890 swell index, ASTM D5891 fluid loss, moisture and grain size.
Laboratory analysis scope
Physical analysis
Moisture, grain size, bulk density
Mineralogical analysis
Montmorillonite and other clay minerals
Chemical analysis
SiO₂, Al₂O₃, Fe₂O₃, CaO, MgO, Na₂O, K₂O
Performance analysis
Product-specific absorption, swelling, filtration, binding or strength
Test standards
ASTM, API, ISO and customer specification
Quality documents
COA, TDS and SDS
Quality documents
Technical Data Sheet
Available on request
Safety Data Sheet
Available on request