Engineered Hydraulic Barriers for Superior Containment
Product Definition
A composite material combining:
- Bentonite clay layer: 5kg/m² sodium-activated montmorillonite (CEC ≥75 meq/100g)
- Geotextile carriers: Needle-punched PP/PET nonwovens (200-500g/m²)
- Reinforcement options: Woven scrim or film laminates
Key Performance Data
ParameterValue RangeTest StandardHydraulic Conductivity≤5×10⁻¹¹ m/sASTM D5887Peel Strength≥400 N/mGRI-GCL13Shear Strength≥25 kPa (@50kPa)ASTM D6243UV Resistance6 months exposedASTM D4355
Standard Size
| Parameter | Common Specifications | Remarks |
|---|---|---|
| Roll Width | 4.0m – 5.2m (13ft – 17ft) | Custom widths up to 6m available |
| Roll Length | 30m – 60m (100ft – 200ft) | Mining projects may require 100m+ |
| Thickness (Dry) | 6mm – 10mm | Expanded to 25mm+ when hydrated |
| Bentonite Load | 3.5kg/m² – 5.0kg/m² | Higher loads for aggressive chemistries |
| Weight (Total) | 4.2kg/m² – 7.5kg/m² | Includes geotextiles + bentonite |
Competitive Advantages
✔ Installation Efficiency: 3x faster deployment vs. compacted clay (5000m²/day crew)
✔ Self-healing: Swells to 10x dry volume when hydrated (per EN 14150)
✔ Chemical Compatibility: pH 2-14 stability (tested per EPA 9090)
Applications
- Landfill liners/caps: Meets EPA Subtitle D (1.0×10⁻⁹ m/s max)
- Mining heap leach pads: Acid-resistant formulations available
- Water reservoirs: NSF-61 certified potable water versions