Composite structure
Combines a nonwoven geotextile layer with a geomembrane to provide multiple engineering functions within one product.
Composite Geomembrane
Geotextile–geomembrane composite for seepage control, separation and reinforcement in civil and hydraulic engineering projects.
Composite geomembrane combines nonwoven geotextile layers with a polymer geomembrane to provide barrier and geotextile functions within a single composite system.
Product Overview
0104
Composite geomembrane is manufactured by combining nonwoven geotextile with a polymer geomembrane layer. Depending on the required structure, the product can be supplied as one geotextile with one geomembrane, two geotextiles with one geomembrane, or multi-layer composite configurations.
The composite structure combines the seepage-control function of the geomembrane with the separation, protection and reinforcement functions of the geotextile. Typical applications include water-conservancy works, canals, dykes, reservoirs, traffic tunnels and other civil-engineering projects requiring a composite barrier system.
Product facts
- Base layer
- Nonwoven geotextile
- Geomembrane material
- Polyethylene or other specified polymer membrane
- Available structures
- One geotextile + one geomembrane
Two geotextiles + one geomembrane
Multi-layer composite structures - Width
- 1–6 m
- Length
- According to project requirements
- Primary functions
- Seepage control, separation, protection and reinforcement
- Applicable standard
- GB/T 17642-2008
- One geotextile + one geomembrane
- Mass per unit area: 200–2000 g/m²
Geomembrane thickness: 0.1–2.0 mm - Two geotextiles + one geomembrane
- Mass per unit area: 300–3000 g/m²
Geomembrane thickness: 0.1–2.5 mm - Three geotextiles + two geomembranes
- Mass per unit area: 500–1000 g/m²
Geomembrane thickness: 0.1–0.8 mm
Key Features
Seepage-control layer
The geomembrane component provides the barrier function required for seepage-control applications.
Geotextile functions
The nonwoven geotextile component provides separation, protection and reinforcement functions around the membrane layer.
Mechanical performance
Breaking strength, CBR puncture strength and tearing-strength requirements are defined according to the selected nominal strength grade.
Multiple configurations
Available in one-geotextile, two-geotextile and multi-layer composite configurations for different project requirements.
Technical Specifications
Primary technical standard
GB/T 17642-2008
Standard description
Geosynthetics — Geocomposites Made of Nonwoven Geotextile and Geomembrane
Technical data reference: customer-provided Composite Geomembrane technical performance table under GB/T 17642-2008.
| Property | Nominal breaking strength — kN/m | |||||||
|---|---|---|---|---|---|---|---|---|
| 5 | 7.5 | 10 | 12 | 14 | 16 | 18 | 20 | |
| MD/CD breaking strength — kN/m | ≥ 5.0 | ≥ 7.5 | ≥ 10.0 | ≥ 12.0 | ≥ 14.0 | ≥ 16.0 | ≥ 18.0 | ≥ 20.0 |
| Elongation corresponding to nominal breaking strength, MD/CD — % | 30–100 | 30–100 | 30–100 | 30–100 | 30–100 | 30–100 | 30–100 | 30–100 |
| CBR puncture strength — kN | ≥ 1.1 | ≥ 1.5 | ≥ 1.9 | ≥ 2.2 | ≥ 2.5 | ≥ 2.8 | ≥ 3.0 | ≥ 3.2 |
| MD/CD tearing strength — kN | ≥ 0.15 | ≥ 0.25 | ≥ 0.32 | ≥ 0.40 | ≥ 0.48 | ≥ 0.56 | ≥ 0.62 | ≥ 0.70 |
| Property | Requirement |
|---|---|
| Static water pressure resistance — MPa | According to the Hydrostatic Pressure table. |
| Peel strength — N/cm | ≥ 6 |
| Vertical permeability coefficient — cm/s | According to project design or contract requirements. |
| Width deviation — % | −1.0 |
| Composite configuration | Geomembrane thickness — mm | |||||||
|---|---|---|---|---|---|---|---|---|
| 0.2 mm | 0.3 mm | 0.4 mm | 0.5 mm | 0.6 mm | 0.7 mm | 0.8 mm | 1.0 mm | |
| One-side geotextile composite | ≥ 0.4 MPa | ≥ 0.5 MPa | ≥ 0.6 MPa | ≥ 0.8 MPa | ≥ 1.0 MPa | ≥ 1.2 MPa | ≥ 1.4 MPa | ≥ 1.6 MPa |
| Two-side geotextile composite | ≥ 0.5 MPa | ≥ 0.6 MPa | ≥ 0.8 MPa | ≥ 1.0 MPa | ≥ 1.2 MPa | ≥ 1.4 MPa | ≥ 1.6 MPa | ≥ 1.8 MPa |
Technical Notes
- Mechanical performance grades are classified by nominal breaking strength and should not be confused with product mass per unit area or geomembrane thickness.
- Static water pressure resistance depends on geomembrane thickness and composite configuration as shown in the Hydrostatic Pressure table.
- Vertical permeability requirements are determined according to project design or contract requirements.
Discuss your product requirements
Send us your application, required specification, quantity and delivery destination for product review and quotation.
Useful information to provide
- Application
- Required composite structure
- Required mass per unit area
- Required geomembrane thickness
- Required width
- Required nominal breaking strength
- Quantity
- Project location
- Delivery destination
- Applicable standard or project specification