Bentonite Waterproof Mat

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A膨润 waterproof mat is a geosynthetic material used for preventing leakage in artificial lakes, landfill sites, underground parking garages, rooftop gardens, ponds, oil storage chemical yards, and other applications. It is filled with highly expansive sodium bentonite in a specially designed composite structure.GeotextileBetween non-woven fabrics, the needle-punched bentonite impermeable mat forms numerous small fiber spaces, preventing the bentonite particles from flowing in one direction. When encountering water, it forms a uniform, high-density gel-like waterproof layer within the mat, effectively preventing water leakage. Bentonite waterproof geomembranes can be classified according to production processes into: needle-punched sodium bentonite waterproof geomembrane, needle-punched coated sodium bentonite waterproof geomembrane, and adhesive sodium bentonite waterproof geomembrane. The needle-punched coated sodium bentonite waterproof geomembrane is a non-woven geotextile coated with a layer of high-density polyethylene on the outer surface of the needle-punched sodium bentonite waterproof geomembrane.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 the thickness of 30cm clay, and it possesses strong self-water-retaining properties.

Its waterproof property is durable due to the inorganic nature of sodium-based bentonite, which does not undergo aging or corrosion even after a long time or changes in the surrounding environment.

Easy installation, short construction period - Compared to other waterproofing materials, it's relatively easy to install without the need for heating or adhesive. Simply connect and secure using bentonite powder, nails, washers, etc. No special inspection is required after installation, and any waterproofing defects are easy to repair.

Unaffected by temperature – will not crack under cold weather conditions.

Integrated - Waterproof materials and objects integration: Sodium bentonite has an expansion capability of 20-28 times when it meets water. Even if the concrete structures undergo vibration and settlement, 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 the environment with no particular impact, and possesses 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: Applicable to municipal (waste landfill), hydraulic, artificial lake construction, 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 rainy or snowy weather; not recommended for use with strong acidic or alkaline solutions for seepage prevention; due to its inorganic nature, bentonite offers better durability than organic waterproofing materials.

Application:

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

Engineering (Landfill) Leak Prevention

Hydrological 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 transverse tensile strength (KN/m) ≥6

GCL longitudinal elongation at break (%) ≥ 10

GCL lateral 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, 1h, no leakage.