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BentIzol® SB 4 bentonite mat — lightweight liner on natural bentonite
BentIzol

BentIzol® SB 4 bentonite mat — lightweight liner on natural bentonite

Bentonite waterproofing

The BentIzol® SB 4 mat is the lightweight version of the natural sodium bentonite series: with a lower clay content it maintains a permeability coefficient of no more than 0.9×10⁻¹¹ m/s. Static puncture resistance is at least 1.8 kN, hydrostatic pressure up to 7 atm, chemical resistance pH 4–11. The material is used for anti-seepage liners of canals, ponds, fire-fighting ponds, MSW landfills and heap leach pads; it self-heals when punctured or cut.

Specifications

ManufacturerBentIzol — OOO “BentIzol”, Vvedenskoye
Typebentonite waterproofing
Usehydraulic structures and dams, tanks and pools
Basegeosynthetic roll material: needle-punched carrier of woven (160 µm) and nonwoven (200 µm) polypropylene with bentonite granules (natural sodium bentonite); polymer additives are not permitted
Packagingroll 5 × 40 m, weight 880 kg; on a core in a sealed polyethylene film sleeve
Application methodcompact the base or embankment and clear it of debris, stones and vegetation; unroll the roll with the “black side” down; longitudinal overlap at least 15 cm, transverse at least 30 cm, stagger transverse joints by at least 30 cm; spread bentonite granules evenly in the overlap, about 0.5 kg per linear m; protective cover layer at least 30 cm; laminated layer facing the more aggressive side, overlaps “mat to mat”, “film to film”; on slopes steeper than 1/4–1/5 (depending on soil type) — a cellular geogrid with anchors through the mat, sprinkle puncture points with granules; on vertical surfaces — construction stapler, fastening gun
Application temperatureinstallation in any season at any temperature
Key propertiesbentonite content 4.0 kg/m²; mass per unit area 4,310 g/m²; permeability coefficient no more than 0.9×10⁻¹¹ m/s; flux no more than 2.5×10⁻⁹ m³/m²·s; static puncture resistance at least 1.8 kN; tensile load at least 12 (longitudinal) / 7 (transverse) kN/m; tear strength at least 400 N/m; dynamic perforation (cone drop) no more than Ø10 mm; thickness at 2 kPa 5.7 mm; flexibility down to −70 °C without damage; resistance to aggressive media pH 4–11; withstands hydrostatic pressure up to 7 atm; service from −70 to +60 °C; self-healing of punctures and cuts; unlimited service life
Layer thicknessthickness at a pressure of 2 kPa 5.7 mm
Shelf liferecommended storage period no more than two years from the date of manufacture; in covered warehouses or under sheds, protected from moisture, sun, mechanical and chemical damage; no more than 5 rolls high
StandardsSTO 87299967.003-2022 “Geosynthetic bentonite roll materials of the BentIzol® type. Specifications”; GOST R certificate of conformity; environmental compliance certificate; seismic resistance certificate; QMS GOST ISO 9001:2015; ITB certificate (Instytut Techniki Budowlanej, Poland); opinion of NIIES (RusHydro); opinion of the K.D. Pamfilov AKKh (Academy of Municipal Economy)

Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.

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