Bentonite Waterproof Mat

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Geosynthetic waterproofing mats are a type of soil engineering material used for preventing leakage in artificial lakes, landfill sites, underground parking garages, rooftop gardens, ponds, oil storage chemical yards, and more. They are made by filling high-expansive sodium bentonite into specially formulated composites.GeotextileBetween non-woven materials, the needle-punched bentonite waterproofing mat forms numerous small fiber spaces, preventing bentonite particles from flowing in one direction. When encountering water, it creates a uniform, high-density gel-like waterproof layer within the mat, effectively preventing water leakage. Bentonite waterproof geomembranes can be categorized by production process into: needle-punched sodium bentonite waterproof geomembrane, needle-punched and film-coated sodium bentonite waterproof geomembrane, and adhesive sodium bentonite waterproof geomembrane. The needle-punched and film-coated sodium bentonite waterproof geomembrane is a sodium bentonite waterproof geomembrane with a non-woven geotextile surface coated with a layer of high-density polyethylene.Geotextile membrane。

Performance Features:

Compactness – Sodium-based bentonite forms a high-density diaphragm under hydraulic pressure. At a thickness of approximately 3mm, its permeability is below &×10ˉ11m/sec, equivalent to the compactness of 100 times a 30cm thick clay, and it possesses strong self-water-retaining properties.

The waterproof property is enduring due to the sodium-based bentonite being an inorganic material. It does not undergo aging or corrosion even after a long time or changes in the surrounding environment, ensuring long-lasting waterproof performance.

Easy construction and short lead time — compared to other waterproofing materials, installation is relatively simple and doesn't require heating or bonding. Just connect and secure using bentonite powder, nails, washers, etc. No special inspection is needed after installation, and it's easy to repair if any waterproofing defects are found.

Unaffected by temperature – will not脆break in cold climates.

Integrated - Waterproofing materials and objects integration: Sodium bentonite has an expansion capacity of 20-28 times when in contact with water. Even if the concrete structure vibrates or settles, the bentonite within the GCL can repair cracks on the concrete surface up to 2mm in width.

—— Bentonite is an inorganic material, harmless to humans and has no particular impact on the environment, with excellent properties.

High performance-to-price ratio, with a wide range of applications. The product range can reach 6 meters, significantly enhancing construction efficiency.

Application Scope and Conditions: Suitable for municipal (landfill), hydraulic, and artificial lake construction, as well as underground waterproofing and seepage prevention projects.

Operable at sub-zero temperatures (-20℃) where traditional waterproofing materials cannot be applied; applicable on damp substrates (without standing water); not suitable for construction during rain or snow; not recommended for use with strongly acidic or alkaline solutions for seepage prevention; as bentonite is an inorganic material, it boasts better durability than organic waterproofing materials.

Application:

Civil engineering (basement, green roof) waterproofing and seepage prevention

Engineering (Landfill) Leak Prevention

Water Conservancy Engineering (Artificial Lakes, Dams) Seepage Prevention
Product Specifications:
Unit area ≥ 4000g/m², width 4m-6m.
Bentonite Waterproof Mat Technical Standards:

Bentonite expansion coefficient (ml/2g) ≥ 24

GCL unit area quality (g/m²) ≥ 4000

GCL longitudinal tensile strength (KN/m) ≥ 6

GCL lateral tensile strength (KN/m) ≥ 6

GCL longitudinal tensile elongation (%) ≥10

GCL transverse tensile elongation (%) ≥10

GCL vertical permeability coefficient (cm/s) ≤ 5×10^-11

GCL剥离 strength (N/100mm) ≥ 40; GCL static water pressure test 0.4MPa, 1 hour, no leakage.