Bentofix® GCL – Standard

The use of liners in civil and environmental applications is becoming more widespread as there develops a greater understanding of the effects of contaminated ground conditions on structures and the environment.

Global Synthetics are able to offer a wide range of liners that are compatible with the diverse range of applications and contaminants likely to be encountered.

Product Information: Bentofix® Geosynthetic Clay Liner (GCL) is a factory produced wide width rolls of bentonite “sandwiched” between layers of geotextile. GCL’s are an engineered replacement for traditional clay lining of proposed containment structures. Bentofix® Thermal Lock geosynthetic clay liners (GCLs) – also known as geosynthetic clay barriers (GBR-C) – are needle-punched, reinforced composites that combine two durable geotextile outer layers and a uniform core of high-swelling powder sodium bentonite clay. This forms a uniform, multi-directional, shear-resistant hydraulic barrier with self-sealing and re-healing characteristics.

Global Synthetics Geosynthetic Clay Liners offer the designer an engineered equivalency to clay without the costly import and placement and quality control costs associated with this traditional method. The volume of containment may be significantly increased with the use of a Global Synthetics Geosynthetic Clay Liner as the product offers equivalency to very thick layers of compacted clay.

Bentofix Geosynthetic Clay Liners – NSP Series

Bentofix® GCL with non woven cover geotextile and woven carrier geotextile. Self-sealing side overlaps (with embedded bentonite 500mm from side edge of roll). Most common grade compliant with Best Practice Environmental Management (BPEM) policy. Ideal for base liners, cappings and used mainly as a replacement of thick, difficult to build, compacted clay liners.

Bentofix® GCLs outperform significantly thicker layers of compacted clay. The exceptional, immediate swelling characteristic of powdered sodium bentonite provides a long-term barrier that can “self-seal and re-heal” (e.g., swell to fill potential punctured/damaged zones) and rehydrate to renew the barrier even if it has been exposed to desiccation. The highly engineered geotextile outer layers provide outstanding protection against piping of the bentonite, durability to resist damage, and strength to manage the challenges inherent in barrier designs, such as for security on slopes and against fluctuating heads.

The Thermal Lock process permanently locks the needle-punched fibres of the non woven geotextile layer with the Bentofix® carrier layer of GCL-types without PE coating and improves the hydraulic conductivity performance at low confining stresses. It also increases the pull-out resistance of the fibres – a durability-improving measure that increases inter-face friction, ensures long-term shear resistance and immediate fibre-strength during hydration.

Applications - Sealing

• Landfill caps, closures and base seal

• Environmental protection under roads, railways, airports

• Dams and dykes

• Water containment and pond applications

• Structural waterproofing

• Secondary containment

• Mining applications

• Tunnels

Features of Bentofix® GCL

• Versatile sealing applications possible

• Immediate sealing and long-term performance with high swellable sodium bentonite powder

• Outperforms compacted clay liners

• Robust geotextiles encapsulate and contain the bentonite

• Uniform needle-punching provides multi-directional shear strength

• Thermal Lock process increases internal shear strength and interface friction angles

• Self-sealing length overlaps;

• Quick, easy and cost effective to install