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

	ST The ST configuration is the industry standard for GCLs. It consists of a layer of sodium bentonite clay between a woven and non-woven geotextile, which are needlepunched together. This configuration provides high tensile and internal shear strength.
	DN The DN "double non-woven" configuration consists of a layer of sodium bentonite clay between two non-woven geotextiles, which are needlepunched together. This configuration provides the highest internal and interface friction properties.
	SDN The SDN "double non-woven" configuration consists of a layer of sodium bentonite clay between two non-woven geotextiles, which are needlepunched together. This configuration provides the high internal and interface friction properties while offering an economical alternative to the DN configuration.
	200R The 200R configuration consists of a layer of our proprietary polymer-modified bentonite between a woven and nonwoven geotextile, which are lightly needlepunched together. This configuration provides an eclaminonomical alternative when internal shear strength is not a design consideration.
	CL The composite laminate series consists of sodium bentonite clay and a flexible plastic membrane. The bentonite clay is encapsulated between two geotextiles that are needlepunched together. The flexible plastic membrane is laminated to the outer geotextile. This configuration provides a maximum permeability 10 times less than standard bentonite-based GCLs and is designed for the highest performance in hydraulic conditions.

NEW!

BENTOMAT DN-HS is the newest addition to the BENTOMAT product Line. Using proprietary, high-density needle-punching technology to generate superior peak shear strength properties for slope stability.