Bentonite Waterproof Mat

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Geotextile waterproofing mats are 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. They are made by filling a special composite with highly expansible sodium bentonite.GeotextileGeotextile mats made by needle-punching method between non-woven materials create numerous small fiber spaces, preventing bentonite particles from flowing in one direction. When encountering water, they form a uniform, high-density gel-like waterproof layer within the mat, effectively preventing water leakage. Bentonite waterproof blankets can be categorized according to production technology: needle-punched sodium bentonite waterproof blankets, needle-punched film-coated sodium bentonite waterproof blankets, and adhesive-coated sodium bentonite waterproof blankets. The needle-punched film-coated sodium bentonite waterproof blanket is a non-woven geotextile coated with high-density polyethylene on the outer surface of the needle-punched sodium bentonite waterproof blanket.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.

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

Easy installation, short construction time - Compared to other waterproofing materials, installation is relatively simple and does not require heating or adhesive. Just connect and secure using bentonite powder, nails, washers, etc. No special inspection is needed after installation, and it's easy to repair any waterproofing defects if found.

Unaffected by temperature - won't crack under cold weather conditions.

Integrated - Waterproof materials and objects integration: Sodium bentonite has an expansion capacity of 20-28 times when it comes into contact with water. Even if concrete structures vibrate or settle, 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, has no particular impact on the environment, and boasts 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.

Operable at sub-zero temperatures (-20°C) 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 highly 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) Liner

Hydrological Engineering (Man-made 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 tensile elongation (%) ≥10

GCL tensile elongation at break (%) ≥10

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

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