Bentonite Waterproof Mat

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Geosynthetic waterproofing mat is a type of soil engineering material used for preventing leakage in artificial lakes, landfill sites, underground garages, rooftop gardens, ponds, oil storage chemical yards, and more. It is made by filling high-expansive sodium bentonite into a specially formulated composite.GeotextileBetween non-woven materials, the needle-punched bentonite waterproofing mat forms numerous small fiber spaces, preventing the 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 waterproofing mats can be categorized by production process into: needle-punched sodium bentonite waterproofing mats, needle-punched and coated sodium bentonite waterproofing mats, and adhesive sodium bentonite waterproofing mats. The needle-punched and coated sodium bentonite waterproofing mat is a non-woven geotextile coated with high-density polyethylene on the outer surface of the needle-punched sodium bentonite waterproofing mat.Geotextile membrane。

Performance Features:

Compactness - Sodium-based bentonite forms a high-density diaphragm under hydraulic conditions. 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 performance 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 construction, short project timeline—Compared to other waterproofing materials, it is relatively simple to install without the need for heating or adhesive. Simply connect and secure with bentonite powder, nails, and washers. No special inspection is required after installation, and any waterproofing defects are easily repairable.

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

Integrated - Waterproof materials and objects integration: Sodium bentonite has an expansion capacity of 20-28 times when encountering water. Even if the concrete structure experiences vibrations and settlements, 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 special impact on the environment, with excellent properties.

High performance-to-price ratio, with a wide range of applications. The product width 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.

Operates at temperatures below traditional waterproofing materials' limits (-20℃); can be applied on damp substrates (without standing water); not suitable for application during rain or snow; not recommended for use with strong acidic or alkaline solutions; its durability is superior to organic waterproofing materials due to the inorganic nature of bentonite.

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 Shear Strength (KN/m) ≥ 6

GCL longitudinal tensile elongation (%) ≥10

GCL lateral tensile elongation (%) ≥ 10

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

GCL剥离 strength (N/100mm) ≥ 40; GCL hydrostatic resistance test 0.4MPa, 1h, no leakage.