BENTOMAT®

BENTOMAT® Geosynthetic Clay Liners available in a wide range of configurations, meeting your project requirements

When designing with GCLs, engineers should consider shear strength, hydraulic performance and chemical compatibility in order to assure a stable, long-lasting and high-performing liner system. BENTOMAT can be configured with various components in order to ensure maximum value and performance.

Not all projects have the same performance requirements for the lining system. BENTOMAT is available in a variety of product configurations to meet the needs of your project.

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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.

BENTOMAT is also offered in a woven/nonwoven configuration (ST) and in a double nonwoven (DN) configuration. The DN configuration provides maximum performance when the project calls for the highest interface friction values.

Hydraulic performance

BENTOMAT is available in several configurations to meet hydraulic performance requirements. The 200R, ST and DN configurations typically meet hydraulic performance requirements in relatively low hydrostatic conditions. When conditions call for higher performance CETCO offers our INTERLOKTM product. Our Composite Laminate series (CL and CLT) provide the maximum performance.

Compatibility

BENTOMAT GCLs have proven performance and compatibility with a wide range of chemicals when used in typical applications. For maximum compatibility performance CETCO offers our ResistexTM line of GCLs.

Features of BENTOMAT

  • SupergrooveTM technology allows bentonite to migrate out and self-seam at the overlap
  • Granular bentonite creates less dust during installation and is less likely to shift during needlepunch reinforcement
  • Needlepunch reinforcements allows BENTOMAT to withstand shear stresses on steep slopes
  • Fully hydrated GCL has a permeability of 5 x 10-9 cm/sec, approximately 20 times lower than a typical CCL

BENTOMAT® DN

BENTOMAT® DN is a reinforced GCL consisting of a layer of sodium bentonite between two nonwoven geotextiles, which are needlepunched together. CETCO products are the only GCLs that offer Supergroove technology, a groove in the nonwoven fabric that allows the bentonite to migrate out and self-seam at the overlap. This feature eases the installation process by eliminating the need for supplemental bentonite. All CETCO geosynthetic clay liners feature granular bentonite, which creates less dust during installation than powdered bentonite and is more likely to stay in place once deployed.

BENTOMAT® ST

BENTOMAT® ST is a reinforced GCL consisting of a layer of sodium bentonite between a woven and a nonwoven geotextile, which are needlepunched together. CETCO products are the only GCLs that offer Supergroove technology, a groove in the nonwoven fabric that allows the bentonite to migrate out and self-seam at the overlap. This feature eases the installation process by eliminating the need for supplemental bentonite. All CETCO geosynthetic clay liners feature granular bentonite, which creates less dust during installation than powdered bentonite and is more likely to stay in place once deployed.

BENTOMAT® 200R

BENTOMAT® 200R is a non-reinforced needle-punched GCL consisting of a layer of sodium bentonite between woven and nonwoven geotextiles, which are needlepunched together. CETCO products are the only GCLs that offer Supergroove technology, a groove in the nonwoven fabric that allows the bentonite to migrate out and self-seam at the overlap. This feature eases the installation process by eliminating the need for supplemental bentonite. All CETCO geosynthetic clay liners feature granular bentonite, which creates less dust during installation than powdered bentonite and is more likely to stay in place once deployed.

BENTOMAT® CLT

BENTOMAT® CLT is a Composite Laminate reinforced GCL consisting of a layer of sodium bentonite between two geotextiles, which are needlepunched together and laminated to 20 to 60 mil thick textured geomembrane. CETCO products are the only GCLs that offer Supergroove technology, a groove in the nonwoven fabric that allows the bentonite to migrate out and self-seam at the overlap. This feature eases the installation process by eliminating the need for supplemental bentonite. All CETCO geosynthetic clay liners feature granular bentonite, which creates less dust during installation than powdered bentonite and is more likely to stay in place once deployed.

BENTOMAT® CL

BENTOMAT® CL is a Composite Laminate reinforced GCL consisting of a layer of sodium bentonite between two geotextiles, which are needlepunched together and laminated to a thin flexible membrane ranging from 5 to 60 mils. CETCO products are the only GCLs that offer Supergroove technology, a groove in the nonwoven fabric that allows the bentonite to migrate out and self-seam at the overlap. This feature eases the installation process by eliminating the need for supplemental bentonite. All CETCO geosynthetic clay liners feature granular bentonite, which creates less dust during installation than powdered bentonite and is more likely to stay in place once deployed.

Technical Data Sheets

Technical References

Bailey Mine

West Finley, Pennsylvania

Bailey Mine, supplies bituminous coal used in the generation of electricity. At the site, coal laden sediment is pumped to settlement ponds which are typically underlain with clay. As the ponds are extended vertically to increase theircapacity, the side slopes must be lined with clay or geosynthetic clay liner (GCL) to prevent the pumped water from reentering the local aquifer.

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Barrick Goldstrike Mine

Elko, Nevada

The Barrick Goldstrike tailings bottom liner system consisted of an 80 mil HDPE textured geomembrane overlaying BENTOMAT DN GCL. The GCL was used as a replacement for the 1 ft of 1 x 10-6 cm/sec permability compacted clay liner.

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Border Checkpoint Embankment

Zosin, Spain

Zosin – Ustiług is an international border control point for cars and buses. Being located on the eastern bor-der of Poland, it is also one of the checkpoints where foreigners enter the European Union (Schengen area) from Ukraine. Before extension this checkpoint was capable of clearing 1700 automobiles and 6 buses a day. After extension the capacity was doubled and allowed for additional admission of up to 1000 cargo vans a day.

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Carlotta Copper

Carlotta, Arizona, U.S.A.

The Carlota Copper mine is an open-pit copper mine located approximately six miles west of Miami, Arizona. The site produces LME grade copper cathode through the process of heap leaching, in which a chemical solution is ir-rigated through heaps of ore, dissolving the precious metal. The resulting copper-infused liquid (aka the pregnant leach solution) trickles down to a leach pad, where it is collected and pumped to a recovery facility. In order to prevent the pregnant leach solution from leaking out, the leach pads are typically comprised of a composite liner system with a geomembrane overlying a low permeability soil layer.

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Copler Mine

Erzincan Province, Turkey

The Gold Mine Heap Leach project is a large, open pit gold deposit located in central Turkey. The site processes gold ore through leaching, in which a chemical solution is irrigated through heaps of ore, dissolving the precious metal. The resulting gold-infused liquid trickles down to a leach pad, where it is collected and pumped to a recovery facility.

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Cordoba High Speed Rail

Herrera, Spain

In high speed railroad lines, continued rainfall periods may cause problems due to the presence of soils sensitive to moisture changes. The ground can respond by shrinking (settlement) when it dries, or swell-ing (heave) when it becomes wet again. This may result with instability of excavation cuts. Many railroad structures and embankments founded on such sensitive, unprotected soils require constant monitoring and remedial measures to prevent a potential failure.

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Duck Creek Power Plant

Central Illnios

The increased use of coal to generate electricity has brought with it an increased amount of coal combustion by-products (CCBs). Metal ions released from these CCBs can be harmful to the environment and therefore need to be contained.

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Dychów Pumped-storage Power Station

Dychow, Poland

The pumped-storage power station in Dychów was constructed between 1933 and 1936. After 75 years of continuous operation the owner of the facility decided to carry out scheduled maintenance and upgrades. The project was started in 2011 with the renovation of two fissured concrete sections of the approach ca-nal, 9.5 km long in total.

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Fort McMurray Oil Sands

Northeastern Alberta, Canada

The Suncor Pond 1 is an oil sands tailings pond located near Fort McMurray, Alberta, Canada. This region experiences an average winter temperature of -19 °C, with a record low temperature of -50 °C. Full-scale closure and reclamation activities had been underway at the site since 2007. In late 2009, infilling of the pond had been completed.

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Freemont Water Reservior

Fremont, Ohio

Constructed in 1911, the Ballville Dam serves as the source of water for the city of Fremont, Ohio. It also blocks fish movement on the Sandusky River, preventing walleye access to an important spawning habitat. As a result, the City of Fremont teamed up with the Ohio Department of Natural Resources to construct a new water supply reservoir, allowing the Ballville Dam to be removed and walleye movement to be unobstructed.

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Kearnes Meadows Ponds

Jackson, Wyoming

Kearns Meadow consists of 41-acres of land in the middle of Jackson, Wyoming. It contains approximately one mile of Flat Creek, which serves as an important spawning habitat for local cutthroat trout.

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Plank Road Landfill

Patterson, New Jersey

Jersey Brownfield was formerly the site of a chemical recycling facility with soil at the site was heavily contaminated.

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Rasmussen Ridge Phosphate Mine

Soda Springs, Idaho

The Rasmussen Ridge Phosphate Mine Tailing Storage Facility was implemented as part of the on-going Supplemental Reclamation Action as a demonstration project. The cap and cover system was designed to effectively eliminate surface water infiltration and potential runoff of trace concentrations of selenium contained in the waste rock.

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TVA Kingston

Harriman, Tennessee

As part of its emissions control at the Kingston Fossil Plant, flue gas desulfurization is performed, which creates as a by-product a synthetic version of the mineral gypsum and must be stored in a gypsum pond or taken to a landfill.

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Zaragoza High Speed Rail

Zaragoza, Spain

In high speed railroad lines, continued rainfall periods may cause problems due to the presence of soils sensitive to moisture changes. The ground can respond by shrinking (settlement) when it dries, or swell-ing (heave) when it becomes wet again. This may result with instability of excavation cuts. Railroad lines founded on embankments comprising sensitive soils require constant monitoring and, in some cases, may require periodic shutdowns and maintenance.

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