Self-Sealing Property - Sodium bentonite swells upon contact with water to form an impermeable gel barrier.
Flexible Installation - Adapts to irregular surfaces and minor substrate movements.
Environmentally Friendly - Natural clay material with no harmful chemicals.
Puncture Resistance - Heals minor damages through bentonite migration.
Cost-Effective Solution - Lower installation costs compared to traditional membranes.
Product Introduction:
Bentonite, with the mineralogical name montmorillonite, is naturally classified into two main types based on its chemical composition: sodium-based and calcium-based. Sodium-based bentonite is known for its high swelling capacity and strong waterproofing properties, making it ideal for applications like sealing and containment. Calcium-based bentonite, while less expansive, is often used in industrial and environmental applications due to its stability and adsorption capabilities.
Product Applications:
1. Landfill Impermeable Closure Treatment: Ensures effective seepage control and environmental protection in waste management systems.
2. Water Features and Artificial Landscapes: Provides waterproofing for ponds, lakes, and decorative water elements.
3. Underground Oil Storage Tank Seepage Control: Prevents leaks and contamination in oil storage facilities.
4. Reservoir and Pool Seepage Control: Ensures water retention and prevents leakage in reservoirs and storage pools.
5. Channel and Canal Seepage Control: Maintains water flow efficiency and prevents seepage in irrigation and drainage systems.
6. Subway Projects: Provides waterproofing for subway tunnels and underground structures.
7. Tunnel Projects: Ensures seepage control and structural integrity in tunnels.
8. Underground Structures and Foundations: Offers waterproofing for basements, foundations, and other underground constructions.
Product Features:
1. Compactness: Sodium bentonite forms a dense, 3 mm-thick diaphragm under water pressure, with permeability as low as α × 10⁻¹¹ m/sec, equivalent to 100 times the compactness of 30cm clay.
2. Durable Waterproofing: As a natural inorganic material, sodium bentonite resists aging and corrosion, ensuring long-lasting waterproof performance.
3. Easy Construction: Simple installation without heating or pasting. Requires only bentonite powder, nails, and washers for connection and fixing. Repairs are easy, and GCL has the shortest construction period among waterproofing materials.
4. Temperature Resistance: Remains effective even in cold climates without becoming brittle.
5. Self-Healing: Sodium bentonite expands 13-16 times when in contact with water, repairing cracks up to 2mm in concrete structures caused by vibration or settlement.
6. Eco-Friendly: Bentonite is a natural, non-toxic, and environmentally friendly material, posing no harm to humans or the environment.
Product Parameters:
| Serial No. | Item | GCL-NP Technical Specification | GCL-OF Technical Specification | GCL-AH Technical Specification |
| 1 | Bentonite waterproofing blanket mass per unit area(g/m2) | ≥204000 and not less than the specified value | ≥ 24000 and not less than the specified value | ≥ 24000 and not less than the specified value |
| 2 | Bentonite expansion index(mL/2g） | ≥24 | ≥24 | ≥24 |
| 3 | Amount of blue absorption (g/100g） | ≥30 | ≥30 | ≥30 |
| 4 | Tensile Strengths(N/100mm) | ≥600 | ≥700 | ≥600 |
| 5 | Elongation Under Maximum Load(%) | ≥10 | ≥10 | ≥8 |
| 6 | Peel Strength(N/100mm)Nonwovens and Woven Fabrics | ≥40 | ≥40 | - |
| 7 | Peel Strength(N/100mm)PE Film And Nonwovens | - | ≥30 | - |
| 8 | Bandpass Factor(m/s） | ≤5.0×10-11 | ≤5.0x10-12 | ≤1.0×10-12 |
| 9 | Hydrostatic pressure resistance | 0.4MPa,1h, Not Addicted To | 0.6MPa,1h, Watertight | 0 . 6 M P a . 1 h , No Hysteresis |
| 10 | Water Loss(m/L) | ≤18 | ≤18 | ≤18 |
| 11 | Bentonite Durability(mL/2g) | ≥20 | ≥20 | ≥20 |
| Testing Program | Test Methods | Technical indicators |
| coefficient of expansion | ASTh D 5890 | 24mL/2g |
| Fluid Loss | ASTh I 5891 | 18mL |
| Mass of bentonite per unit area | ASTM D 5993 | 4.8kg/m 2 |
| Tensile Strength | ASTM D 4632 | ≥400N |
| Peel Strength | ASTM D 4632 | ≥65N |
| Indicative flow rate | ASTh D 5887 | ≤1 ×10 -8m 3 /m 2/sec |
| Permeability | ASTMD 5887 | ≤5 ×10 -9 cm/sec |
| Tensile strength after wetting | ASTh D 5321 | >24kPa typical |
Business Strength:
Haoyang Environmental Technology is at the forefront of geosynthetic innovation, producing advanced materials like needle-punched geotextiles with superior tensile strength and puncture resistance. Their product range also features seamless wide-width geomembranes, ideal for containment applications, as well as hybrid geocomposites that combine filtration, drainage, and reinforcement functions. By leveraging advanced polymer technologies, the company delivers durable, chemically resistant materials for demanding environmental and construction projects.
