Composite Geotextile / Impermeable Geotextile
Composite Geotextile, also known as Impermeable Geotextile, is a composite geosynthetic material combined with geotextile and geomembrane, widely used in environmental, hydraulic, and civil engineering projects for anti-seepage, isolation, drainage, and protection applications.
Introduction
Composite Geotextile are one of the most practical integrated geosynthetic materials used to prevent liquid leakage and stabilize soil structure in various engineering projects. They provide excellent impermeability and comprehensive mechanical durability in harsh environments.
What is Composite Geotextile?
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Composite Geotextile is a layered composite fabric bonded by nonwoven geotextile and HDPE geomembrane through thermal compounding process. It is commonly composed of virgin polyester fiber and high-density polyethylene raw resin.
These composite materials are essential for preventing water seepage, isolating pollutants, draining accumulated water and protecting anti-seepage layers from mechanical damage in geotechnical construction.
Types of Composite Geotextiles
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One Cloth One Film: basic composite structure, common anti-seepage projects
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Two Cloth One Film: double protection layer, high puncture resistance
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One Cloth Two Film: double-sided impermeability, strict anti-leakage requirement
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Reinforced Composite Geotextile: high strength for complex geological conditions
Key Features of Composite Geotextile
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Excellent impermeability and stable anti-seepage performance
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High resistance to chemicals, acid, alkali and UV exposure
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Strong tensile and puncture resistance for double-layer protection
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Long service life in humid and corrosive geological conditions
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Adaptability to complex terrain and diversified construction requirements
Technical Specifications
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Weight: 200g/m² – 1500g/m²
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Width: up to 8 meters
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Material: Polyester Fiber + HDPE Resin
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Craft: Thermal composite integrated bonding
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Standards: ASTM, ISO
Applications of Composite Geotextile
Composite Geotextiles are widely used in various industries:
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Landfill anti-seepage, covering and isolation projects
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River, reservoir and dam water storage anti-leakage
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Artificial lake, wetland and landscape water conservancy
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Aquaculture pond and shrimp farm anti-seepage lining
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Tunnel, underground garage and basement waterproofing
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Mining tailings pond and industrial sewage anti-leakage systems
Advantages of Composite Geotextile
Compared with single geomembrane and geotextile, composite geotextiles offer several advantages:
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Dual functions of anti-seepage and protection in one material
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Avoid membrane puncture and extend engineering service life
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Simplify construction procedures and save project cost
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Easy cutting, transportation and on-site installation
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Stable anti-aging and corrosion resistance for long-term use
Installation and Laying
Composite geotextiles are flatly laid and overlapped on smooth base layers. The membrane joints are welded tightly and fabric edges are fixed firmly to avoid displacement. Standard laying ensures perfect anti-seepage effect and long-term structural stability.
How to Choose Composite Geotextile?
When selecting composite geotextile, consider the following factors:
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Project anti-seepage grade and construction environment
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Cloth gram weight and membrane thickness requirements
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Environmental conditions (humidity, chemical corrosion)
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Structure type: one cloth one film or two cloth one film
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Compliance with international anti-seepage standards
FAQ
What is composite geotextile used for?
It is used for anti-seepage, isolation, drainage and protection in hydraulic, environmental and underground engineering.
What is the difference between composite geotextile and ordinary geotextile?
Composite geotextile is impermeable combining cloth and film, while ordinary geotextile is single permeable fabric for filtration and drainage.
How long does composite geotextile last?
It can last 40–70 years under buried conditions depending on raw material quality.
Can composite geotextile be customized?
Yes, gram weight, membrane thickness and width can be customized for specific projects.
Conclusion
Composite Geotextiles are integrated composite materials for modern engineering projects requiring reliable anti-seepage and isolation solutions. Their dual protection performance, stability and cost-effectiveness make them a preferred choice for water conservancy and environmental industries.
