For waterproofing of earthen structures (vertical walls as well as flat areas), the sealing action of the Bentofix® Geosynthetic Clay Liner is ideal. When used with concrete, the bentonite-filled cover nonwoven of the Bentofix® fills and seals micro cracks that may exist in the concrete, creating an additional sealing layer. Because reinforced concrete structures are porous by nature and are susceptible to cracking, natural sodium bentonite is an ideal sealing material due to its ability to swell when in contact with water, creating an impermeable barrier. The gel-like consistency of hydrated sodium bentonite, especially the bentonite impregnated into the nonwoven, allows it to mould to the profile of the reinforced concrete element, sealing small surface cracks as well as those occurring when the structure is in service. For this system to function correctly, it is essential that the bentonite barrier has direct contact with the reinforced concrete element it is protecting. So it prevents fluid flow between the elment surface and the sealing system itself. BENTOFIX® BFG 5000 is ideally suited for waterproofing applications since the outer layer of the nonwoven geotextile is impregnated with an additional layer of natural sodium bentonite over its entire surface area. The product is installed with the nonwoven geotextile abutting the concrete element. This gives continuity and an intimate contact over the entire area where the bentonite meets the surface of the reinforced concrete structure. Once hydrated, the sodium bentonite impregnated into the outer surface of the nonwoven geotextile swells into small cracks or imperfections, sealing them from the ingress of water. Also, this ensures that all overlaps of the BENTOFIX® BFG 5000 are sealed, even if panels are cut to size or trimmed to fit around protrusions. A special patented manufacturing process allows the stable encapsulation of bentonite powder inside the nonwoven pores.

Carbofix® high density polyethylene (HDPE) concrete protection liner systems have been specially developed for corrosion protection and as a liquid barrier for concrete structures. They are particularly effective in protecting the concrete structure from chemical attack and in preventing environmental contamination from hazardous chemical liquids permeating through the concrete structure. As a liquid retention structure, the Carbofix® concrete system offers the strength and durability of concrete combined with the excellent mechanical and chemical resistance properties due to the quality resin of the selected thermoplastics.

By employing complete geosynthetic solutions from NAUE, a dryearthen structureel can be created with state-of-the-art materials and technology. Carbofol® and Carbofix® geomembranes as well as Bentofix® Geosynthetic Clay Liners are used for sealing applications. Secutex® nonwovens are used for filtration, separation and protection. Secudrain® is used for drainage while Secugrid® geogrids are ideal for reinforcement.