Shandong Longxiang New Materials Co., Ltd.
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Composite EVA Geomembrane with Geotextile Backing for Drainage & Protection
Classification :
PRODUCT DETAILS
1. Product Overview
Waterproofing + Protection + Drainage in One Roll. Our Composite EVA Geomembrane combines the superior impermeability of EVA resin with a protective layer of Non-woven Geotextile (typically 200g-400g/m²). This innovative dual-layer design serves multiple functions: the EVA sheet prevents water ingress, while the geotextile backing cushions the liner against sharp rocks on the substrate and facilitates the drainage of groundwater to side drains.
2. Key Features
Built-in Puncture Protection: The geotextile layer acts as a buffer, significantly reducing the risk of the EVA liner being punctured by sharp shotcrete or rebar during installation.
Integrated Drainage Path: The geotextile creates a transmissive layer that allows hydrostatic pressure to dissipate, preventing water buildup behind the liner.
Installation Efficiency: Installing a composite roll is 50% faster than laying geotextile and geomembrane separately.
Enhanced Friction: The rough geotextile surface increases friction against the civil structure, preventing slippage during placement.
3. Technical Specifications
Specification Item | Unit | Description / Value |
|---|---|---|
Structure Type | - | EVA Sheet + Nonwoven Geotextile (Heat Bonded) |
EVA Layer Thickness | mm | 1.0mm, 1.2mm, 1.5mm, 2.0mm |
Geotextile Weight | g/m² | 200g, 300g, 400g, 500g (Customizable) |
Total Weight | g/m² | Based on combination |
Peel Strength (Bonding) | N/mm | ≥ 6.0 (High Integrity) |
Tensile Strength (Composite) | KN/m | ≥ 18 (Varies by geotextile) |
Roll Width | m | 2.0m - 4.0m |
Roll Length | m | 50m (Standard) |
4. Applications
Vaulted Ceilings: Tunnels and underground storage where drainage is critical.
Basement Walls: Exterior waterproofing where backfill protection is needed.
Roof Gardens: Root barrier systems requiring extra cushioning.
Geomembrane FAQs
1.What is a geomembrane used for?
Geomembranes primarily serve as low-permeability barriers and are widely utilized in the base lining and capping of landfills, tailings dam containment, and the construction of landscape ponds and water reservoirs. In municipal and transportation engineering, they are frequently employed for tunnel waterproofing, basement damp-proofing, and roadbed reinforcement to prevent the seepage of liquids and hazardous substances, thereby safeguarding the safety of groundwater environments.
2. HDPE vs LLDPE vs PVC geomembrane: which should I choose?
Thanks to its exceptional chemical stability and UV resistance, HDPE is the preferred choice for long-term projects such as landfills. LLDPE offers superior flexibility and elongation properties, making it suitable for complex terrains and irregularly shaped containment applications. PVC, known for its excellent conformability, is frequently used in non-exposed applications—such as tunnels or underground structures—for leak repair and sealing purposes.
3. What thickness of geomembrane do I need for a pond or landfill liner?
The selection of thickness must be based on pressure testing results and specific geological conditions. Typically, a minimum thickness of 0.75 mm (30 mil) is recommended for landscape ponds. For high-risk projects such as landfills, the GRI-GM13 standard recommends a base liner thickness of no less than 1.5 mm (60 mil). If the site involves sharp rock fragments or is subject to extremely high hydrostatic pressure, the thickness should be increased to 2.0 mm, accompanied by the use of a protective geotextile layer.
4. What QA/QC documents should a geomembrane manufacturer provide?
Manufacturers are required to provide a Material Test Report (MTR) that includes batch tracking records and covers key performance indicators such as tensile properties, tear strength, carbon black content, and OIT (Oxidative Induction Time). Additionally, the documentation must include a Certificate of Conformity (COC) adhering to ISO/ASTM standards, reports on the raw resin materials used, and records of in-process monitoring data collected during manufacturing.
5. How are geomembrane seams welded and tested?
Dual-track thermal fusion welding is the industry-standard method; this process utilizes extrusion or a hot wedge to create a pair of parallel weld seams, leaving an air channel between them. Testing is categorized into non-destructive methods (such as vacuum box testing or air pressure testing, which ensure stable pressure within the air channel) and destructive methods (such as peel and shear tests), ensuring that the weld strength meets or exceeds 90% of the base material's standard value.
6. What is the service life of an HDPE geomembrane liner?
In a buried environment, a compliant HDPE geomembrane has a theoretical service life exceeding 100 years at a constant temperature of 20°C. When used in exposed applications, the service life is influenced by ultraviolet radiation and typically ranges between 20 and 30 years. Its durability depends primarily on the antioxidant content within its formulation and the rate at which these antioxidants are depleted under environmental stress.
We produce the following types of geomembranes:
Main Products
PROJECT CASES
APPLICATION AREAS
Geotechnical material series are widely used in various fields such as highways, railways, tunnels, water conservancy of reservoirs and canals, artificial lakes, environmental protection, sewage treatment, landfills, anti-seepage of tailings reservoir areas, and livestock breeding.
Water conservancy projects
Geosynthetics play a vital role in water conservancy projects such as dams and reservoirs, canals and channels, and riverbank protection.
Breeding industry
In the aquaculture industry, geosynthetics such as geomembranes and geotextiles can be used to create healthy aquaculture ponds, ensure stable water quality and reduce water resource consumption. All geosynthetics provided by can be customized according to customer needs.
Road construction
The geosynthetics such as geomembranes, geotextiles, geogrids, geocells, etc. provided by play an irreplaceable role from roadbed treatment to pavement protection, from drainage systems to environmental protection isolation.
Agricultural
In agricultural irrigation and biogas digester scenarios, geosynthetics such as geomembranes and geotextiles play a key role due to their respective characteristics. The products provided by Factory meet the standards and can be customized according to requirements.
Coastal Engineering
In coastal engineering, geosynthetics such as geobags, cement blankets, and geogrids play an important role in coastal engineering from coastal protection, structural reinforcement to slope stability, and effectively respond to the challenges brought by the complex geology and environment of coastal areas.
Environmental Protection
Factory provides customers with high-standard geosynthetics to meet their needs for building landfills.
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Email : longxiang@lxgeosynthetics.com
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