Bentomat - Geosynthetic Clay Liner
From Environmental Products - Geosynthetic Clay Liners - Bentomat
The Global Standard for GCLs: Sodium bentonite-based GCLs provide an excellent hydraulic barrier in applications where leachate in direct contact with the GCL is relatively non-aggressive, or in composite lining applications where the GCL is overlain by a thermally welded geomembrane and hydrates from uptake of innocuous moisture from the subgrade.
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Product Details
Interface and internal shear strength
Depending on the site conditions, the interface and internal shear strength requirements may vary. BENTOMAT is available in a non-reinforced configuration to allow maximum value for your site. It is also available with the industry leading highest needle-punch density providing maximum performance when high internal shear strength is needed.
Common Applications for Bentomat GCLS
- Impoundments
- Leach Pads
- Capping
Advantages
Over compacted clay liner systems:
- Self-healing and self-seaming
- Better hydraulic performance
- Easier installation in varying weather conditions
- Faster deployment
- Requires less material/lower carbon foot print
- Design certainty with engineered materials
Configurations
DN
- Commonly used in canyon landfills where slopes are as steep as 1.5H:1V
- Suitable for applications requiring high internal and interface shear strengths
- Consists of a layer of sodium bentonite between two heavier weight nonwoven geotextiles
- Needlepunch reinforcement
DN-HS
- The next evolution in high shear strength performance
- Built on DN technology, DN-HS offers the highest shear strength performance
- Superior peak shear strength properties for slope stability
- High density needlepunch reinforcement
ST
- Ideal for applications involving slopes up to 3H:1V
- Most commonly specified GCL
- Consists of a layer of sodium bentonite between a woven and nonwoven geotextile
- Needlepunch reinforcement
STM
- Commonly specified in mining applications
- Reduced bentonite loading is more cost-effective and easier to transport to remote mining sites
- Good alternative for projects where hydraulic requirements may not be as stringent
- Consists of a layer of sodium bentonite between a woven and nonwoven geotextile
- Needlepunch reinforcement
Non-Reinforced GCLs
200R
- Acts as a low-permeability liner under a geomembrane in applications with slopes up to 10H:1V, or where high internal shear strength is not critical
- Excellent cost-effective alternative to compacted clay
- Consists of a layer of sodium bentonite between a woven geotextile and a lightweight nonwoven geotextile
- Needlepunch bonded
Composite Laminate GCLs
CLT
- Ideal for more demanding landfill covers and liquid containment applications involving steep slopes
- Consists of a layer of sodium bentonite between two geotextiles laminated to a textured HDPE geomembrane
- Needlepunch reinforcement
CL
- Used in landfill covers, ponds, and liquid containment
- Ideal for applications involving slopes up to 3H:1V
- Excellent hydraulic performance and has puncture and tensile strengths beyond conventional plastic membranes
- Consists of two carrier geotextiles encapsulating a layer of sodium bentonite with a polyethylene geofilm laminated to one side
- Needlepunch reinforced
600CL (non-reinforced)
- Used for flat areas of landfill caps and high hydraulic head conditions in liquid containment applications
- Suitable for low shear strength applications
- Consists of two lightweight geotextiles encapsulating a layer of sodium bentonite with a polyethylene geofilm laminated to one of the geotextiles
- Needlepunch bonded
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