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BENTOMAT® Geosynthetic Clay Liners

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. 

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

Configurations

STANDARD REINFORCED GCLs

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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
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DN9

  • The next evolution in high shear strength performance 
  • Built on DN technology, DN9 offers the highest shear strength performance
  • Superior peak shear strength properties for slope stability
  • High density needlepunch reinforcement
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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
bentomat-dn-geosynthetic-clay-liner-cetco

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

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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

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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
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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
bentomat-cl-geosynthetic-clay-liner-cetco

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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    Brochures
    Case Studies
    Drop-In Spec

    We build all of our GCLs to be compliant with GRI-GCL3 and their guide specifications can be found for use on the Geosynthetic Institute website.

     

    In the News

    Helena-Lewis and Clark National Forest Finish Repairs on Park Ditch - KTVH, June 2020

    CETCO Launches BENTOMAT DN-HS GCL to Achieve Superior Peak Shear Strength Properties - CETCO, February 2020
    Creating a Garden Pond: How to Choose the Right Lining - Telegraph, September 2015
    Design Considerations for GCLs in Leach Pad Liner Systems - Geosynthetics Magazine, October 2014
    Dynamic Shear Strength of Geosynthetic Clay Liners - Geosynthetics Magazine, October 2013
    Evaluations of Engineered Cover Systems for Mine Waste Rock and Tailings - Geosynthetics Magazine, June 2013
    Static Shear Strength of Geosynthetic Clay Liners - Geosynthetics Magazine, February 2013
    New Geosynthetics Advocacy Aimed at State and Local Levels - Geosynthetics Magazine, February 2013
    Shear Strength of Geosynthetic Clay Liners: Part 1 - Strength Measurement - Geosynthetics Magazine, October 2012
    Use of Geosynthetics in Deicing Facilities at the Cleveland Airport - Geosynthetics Magazine, June 2007
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