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Bentonite Waterproofing Blankets: Superior Sealing for Modern Construction

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Bentonite Waterproofing Blankets: Superior Sealing for Modern Construction
3-layer structure of needle-punched bentonite waterproofing blanket diagram
Geosynthetic Clay Liner (GCL)
Geosynthetic Clay Liner (GCL)

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Description

Bentonite Waterproofing Blankets: The Self-Sealing Solution for Critical Containment

Managing water and contaminants in construction and environmental projects requires fail-safe solutions. Traditional impermeable barriers can be complex to install and prone to failure at seams. Haoyang Environment Co, Ltd offers advanced bentonite waterproofing blankets – engineered geosynthetic clay liners (GCLs) that provide a robust, self-healing hydraulic barrier for your most demanding applications.

What is a Bentonite Waterproofing Blankets?

A bentonite waterproofing blanket is a factory-manufactured composite liner. It consists of a uniform layer of high-swelling sodium bentonite clay encapsulated between two layers of geotextile fabric. When hydrated, the bentonite swells to form a dense, low-permeability gel that effectively seals against water and many chemicals. This needle-punched structure creates a durable, flexible mat that is easy to install.

Our Product Range

1. Standard Bentonite Blankets (GCL)
  • Structure:​ Needle-punched nonwoven geotextile/bentonite/nonwoven geotextile.
  • Bentonite Loading:​ 3.5 – 5.0 kg/m².
  • Applications:​ Landfill caps, pond liners, secondary containment.
  • Key Features:​ Excellent self-sealing, high shear strength, cost-effective.
2. Reinforced Bentonite Blankets (GCL-GM)
  • Structure:​ Bentonite layer laminated to a HDPE or LLDPE geomembrane.
  • Applications:​ Primary liner for landfills, mining leach pads, and toxic waste containment.
  • Key Features:​ Ultra-low permeability, enhanced chemical resistance, and high tensile strength.
Technical Specifications
Parameter
Standard GCL
Reinforced GCL (GCL-GM)
Bentonite Mass​
3.5 – 5.0 kg/m²
4.0 – 5.5 kg/m²
Permeability (Hydrated)​
≤ 5 x 10⁻¹¹ m/s
≤ 1 x 10⁻¹² m/s
Tensile Strength​
≥ 8 kN/m
≥ 12 kN/m
Swell Index​
≥ 24 mL/2g
≥ 24 mL/2g
Roll Dimensions​
4.5m x 30m (standard)
Custom widths available

Key Advantages & Benefits

Superior Self-Sealing:​ Swells to seal punctures up to 30mm, ensuring long-term integrity.
Environmental Safety:​ Uses natural sodium bentonite, a non-toxic mineral.
Rapid Installation:​ Lightweight rolls deploy quickly, cutting installation time by up to 60% vs. compacted clay.
Exceptional Durability:​ Resists freeze-thaw cycles, wet-dry cycles, and chemical attack.
Cost-Effective:​ Reduces material and labor costs compared to traditional clay or geomembrane-only systems.

Applications

Environmental Protection
  • Landfill base liners and final closure caps
  • Decorative and fire protection ponds
  • Secondary containment for tanks and basins
Mining & Industrial
  • Tailings storage facility (TSF) liners
  • Heap leach pad liners
  • Industrial wastewater lagoon containment
Civil & Infrastructure
  • Tunnel and underground structure waterproofing
  • Foundation waterproofing
  • Green roof root barriers

Why Choose Our Bentonite Waterproofing Blankets?

Proven Performance & Quality
  • Manufactured to meet/exceed GRI-GCL3, ASTM, and other international standards.
  • Rigorous factory quality control ensures consistent bentonite loading and panel integrity.
  • Third-party certification available for critical projects.
Technical Expertise & Support
  • Our engineering team provides application-specific design support.
  • We offer detailed installation guidelines and best practice manuals.
  • Available for on-site consultation during installation for complex projects.
Sustainability
  • Contains natural, abundant bentonite clay.
  • Significantly reduces the carbon footprint associated with quarrying and transporting compacted clay.
Request Your Solution & Samples Today
Contact our technical specialists for:
  • Free product samples​ and performance data sheets
  • Project-specific technical consultation​ and system design
  • A competitive quote​ tailored to your project specifications
  • Installation guidance​ and support
📧 Email:​ [email protected]
🌐 Website:​ www.hyhdpemembrane.com

FAQ Section

Q: How does the self-sealing property work?
A: When the sodium bentonite hydrates, it can swell to 10-15 times its dry volume, forming a dense gel that automatically seals around punctures, small rips, or uneven subgrades.
Q: Can bentonite blankets be installed in cold or wet weather?
A: Yes, with proper precautions. We provide cold-weather installation guidelines. The blanket must be protected from premature hydration during storage and installation.
Q: What is the typical design life of your GCLs?
A: When properly installed and protected, our bentonite waterproofing blankets have a design life exceeding 50 years for most applications.
Haoyang Environment Co, Ltd – Engineering Confidence. Containing the Future.

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