NaBento offers a reliable and economical alternative to conventional mineral liners. The approx. 1 cm thick composite product comprises a securely encapsulated, highly swellable clay - either sodium or calcium bentonite - sandwiched between textile cover and supporting layers so as to prevent displacement and erosion. The components are sewn together in such a way as to achieve composite action and high internal shear strength. Once the liner is sewn together, the joint action of the geotextiles and high-grade bentonite - consisting mainly of the clay mineral montmorrillonite - guarantees outstanding long-term impermeable performance.
NaBento is custom-manufactured for this particular application. Specifiable parameters include the type of bentonite, synthetic raw materials, weight per unit area and fabrication details. Through optional application of a special surface coating, enhanced protection is provided against drying-out and the shear strength at junctions with adjacent materials is increased. It is also possible to fit NaBento with a special root barrier.
Suitability assessments of NaBento RL-C (calcium bentonite) and RL-N (sodium bentonite) conducted by LAGA (Waste Working Group of German Federal and State Governments) for use as a mineral liner in Class I and II landfill cover lining systems showed the products to offer a guaranteed service life, in terms of mechanical resistance and sealing performance, of over 100 years. Thanks to its ease of use, NaBento allows for quick installation. Bentonite powder/paste is normally used to seal the joints between adjacent sheets. A special adhesive can also be supplied if required. Compliant with requirements of LAGA (Waste Working Group of German Federal and State Governments) and RiStWag (German Guidelines for Roadbuilding Works in Water Protection Areas). NaBento is a registered trademark of HUESKER Synthetic GmbH.
- Flexible, large-area impermeable barrier
- Low susceptibility to settlement and high erosion resistance
- High internal shear strength
- Straightforward and largely weather-independent installation
- Factory-made, quality-controlled clay liner