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Our Βusinesses
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    Imerys Absorbents
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    Steel Casting Fluxes
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    Civil Engineering Additives
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    NYCO
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    Bentonite & Perlite Intermediates
Our Applications
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    Ceiling Tiles & Boards
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      Boards
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      Ceiling Tiles
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    Civil Engineering
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      Diaphragm/Slurry Wall
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      Horizontal Directional Drilling
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      Landfill and Sealing Liners
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      Pipe Jacking
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      Shield Tunnelling
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    Construction materials
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      Plasters & Mortars
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    Food – Feed
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      Phosphates
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    Foundry
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      Core Sand Binders and Additives
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      Green Sand Additives
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      Technical Support
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    Glass & Ceramics
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      Ceramics
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    Adhesives and Sealants
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    Cryogenics
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    Elastomers
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    Friction
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    Ironmaking
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    Mold Fluxes Raw Materials
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Our Natural Resources
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    Zeolite
Our Industrial Solutions
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    ASPECT® – Chemically Modified/Untreated, Fine Particle Size, High Aspect Ratio Wollastonite
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    Bentonite Clumping Pet Litter
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    Blends
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    Casting Fluxes
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    Cement Stable Bentonite
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    Civil Engineering Flocculants
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    Clumping, Non-clumping and Organic Pet Litter
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    Construction Pozzolan
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    Construction Wollastonite
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    Core Sand Additives
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    Covering Materials
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    Drilling Bentonite
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    ENVIBOND® System
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    Green Molding Sand Expertise
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    HARRP – Coarse Grades of Untreated Wollastonite
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    HDD Bentonite
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    Horticultural Raw Perlite
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    Horticultural Zeolite
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    Inorganic Core Sand Binders
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    Iron Ore Pelletizing Bentonite
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    Laboratory Analysis
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    Lustrous Carbon Formers
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    Metallurgical Active Slags
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    Micrasil®
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    Mold Flux Feeders
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    Moulding Sand Binders
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    NYAD® – Untreated Wollastonite
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    NYGLOS® – Chemically Modified/Untreated Wollastonite
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    NYLITE™ – Wollastonite Blend and Additive
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    Oilfield, agricultural & other industrial products
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    Other Foundry Products
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    Phosphate Production Additive
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    PHYLLOCOAT™ – Chemically Modified Aluminosilicate (Experimental)
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    PHYLLOMAT™ – A Lamellar-Shaped Aluminosilicate
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    Pipe Jacking Bentonite
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    Raw Graded Perlite
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    RIKO®
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    Sealing Bentonite
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    Service Lab Analysis Database
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    Slag Binders
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    Slurry Wall Bentonite
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    Technical Support and Innovation
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    Tunneling Bentonite
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    ULTRAFIBE® – Chemically Modified/Untreated Wollastonite for Friction Materials
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    ULTRAFINE NYAD – Ultrafine Wollastonite, untreated
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    WOLLASTOCOAT® – Chemically Modified Wollastonite
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    Wollastonite 95 – special grades for ceramics applications
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    Zeolite Pet Litter

Landfill and Sealing Liners

Landfill Sealing Bentonite Application

Imerys Civil Engineering offers Sealing Bentonites, which come in a range of specifications for a variety of sealing applications for landfills, lakes and waste deposits as well as in earth construction and water engineering. Bentonite quality and installation technique will vary depending on a number of factors, including local soil quality and the presence or potential presence of pollution and any accompanying safety requirements.

Since the advent of bentonite as a landfill sealing material in the U.S. in the 1930s, the technology has evolved into a range of highly advanced applications. But the principle is the same: Bentonite has the ability to absorb seven to eight times its weight in water and retain the absorbed water even after compaction. The hydrated bentonite does not allow water to penetrate it or pass through it, thus creating an impermeable barrier. Used as a landfill liner, the bentonite protects subsoil and groundwater from seepage of harmful substances.

In its simplest application, existing soil is mixed with a certain percentage of bentonite (depending on soil properties), before being hydrated to maximum absorption and compacted. More advanced solutions include multiple barriers, or geosynthetic clay liners (GCL), where a woven textile matt is simply filled with bentonite and hydrated, providing the added advantage of ease of installation. Imerys Civil Engineering has the appropriate palette of bentonite based products and expertise to cover all requirements. Especially for GCLs, Imerys provides the appropriate qualities depending on the processing and requirements of the customer.