What is a Composite Geomembrane?

Composite geomembranes are used in channel anti-seepage projects. Geosynthetics have been used in civil engineering, especially in flood control and emergency rescue projects, and have played an important role in anti-seepage, reverse filtration, drainage, reinforcement, and protection.

Composite geomembrane definition

Composite geomembrane is an impermeable material composed of geotextile and geomembrane liners. It is used for anti-seepage. The composite membrane is divided into one geotextile and one geomembrane and two geotextiles and one geomembrane. 1500g/m2, high physical and mechanical performance indicators such as tensile strength, tear resistance, bursting, etc., can meet the needs of civil engineering such as water conservancy, municipal administration, construction, transportation, subway, tunnel, etc. Since the composite geomembrane liner is made of polymer materials and an anti-aging agent is added in the production process, it can be used in an unconventional temperature environment.

Composite Geomembrane
Composite Geomembrane

Composite geomembrane properties

The composite geomembrane (composite anti-seepage geomembrane) is divided into one geotextile and one geomembrane and two geotextiles and one geomembrane. The width is 4-6m, the weight is 200-1500g/square meter, and the physical and mechanical performance indicators such as tensile resistance, tear-resistance, and bursting High, the product has the characteristics of high strength, good elongation, large deformation modulus, acid and alkali resistance, corrosion resistance, aging resistance, and good anti-seepage performance. It can meet the needs of civil engineering such as anti-seepage, isolation, reinforcement, crack prevention, and reinforcement in water conservancy, municipal administration, construction, transportation, subway, tunnel, and engineering construction. It is often used for the anti-seepage treatment of dams and drainage ditches, and anti-fouling treatment of waste yards.

Composite Geomembrane Specifications

1. One geotextile and one geomembrane(geotextile: 100-1000g/m2; geomembrane thickness: 0.1-1.5mm)

2. Two geotextiles and one geomembrane(geotextile: 80-600g/m2; geomembrane  thickness: 0.2-1.5mm)

3. One geotextile and two geomembranes (geotextile: 100-1000g/m2; geomembrane  thickness: 0.1-0.8mm)

4. Many geotextiles and many geomembranes (geotextile: 100-1000g/m2; geomembrane  thickness: 0.1-0.8mm)

Composite Geomembrane
Composite Geomembrane Specifications
From left to right are:
One geotextile and one geomembrane
Two geotextiles and one geomembrane
One geotextile and Two geomembranes

composite geomembrane Features

1. High puncture resistance and high friction coefficient;

2. Good aging resistance, adapt to a wide range of ambient temperatures;

3. Excellent anti-drainage performance;

4. Applicable to water conservancy, chemical industry, construction, transportation, subway, tunnel, garbage disposal, and other projects.

composite geomembrane Application

1. Composite geomembrane is suitable for water conservancy. Such as anti-seepage, plugging, reinforcement of dams of rivers, lakes, and reservoirs, anti-seepage of canals, vertical core walls, slope protection, etc.

2. Composite geomembrane can be used for environmental protection and sanitation. Such as landfills, sewage treatment plants, power plant conditioning pools, industrial, hospital solid waste, etc.

3. Composite geomembrane can be used in gardens, artificial lakes, rivers, reservoirs, pond bottoms of golf courses, slope protection, green lawns, etc.

4. Composite geomembrane can also be used for municipal engineering, subway, underground engineering of buildings, planting roofs, seepage prevention of roof gardens, and sewage pipes.

5. Composite geomembrane is suitable for mining, washing tank, heap leaching tank, ash dump, dissolution tank, sedimentation tank, storage yard, tailings bottom lining anti-seepage, etc.

6. Petrochemical, chemical plants, refineries, oil storage tanks, seepage prevention, chemical reaction tanks, sedimentation tank linings, secondary linings, etc. can still use composite geomembrane.

7. The composite geomembrane is also used in aquaculture, intensive, factory farming ponds, fish ponds, lining of shrimp ponds, sea cucumber circle slope protection, and other fields.

8. Salt industry, salt field crystallization pond, brine pond cover, salt film, salt pond plastic film.

9. Composite geomembrane is also used in agriculture, reservoirs, drinking water pools, storage ponds, and anti-seepage irrigation systems.

10. Transportation facilities, foundation reinforcement of highways, and seepage prevention of culverts can be constructed with a composite geomembrane.

Composite geomembrane construction

The composite geomembrane is heated by far-infrared in an oven on one side or both sides of the geomembrane, and the geotextile and the geomembrane are pressed together by a guide roller to form a composite geomembrane. With the improvement of production technology, there is also a process of making composite geomembrane by casting method. Its form has one cloth and one film, two cloths and one film, two films and one cloth, etc.

The geotextile is used as the protective layer of the geomembrane to protect the impermeable layer from damage. To reduce ultraviolet radiation and increase anti-aging performance, it is best to use the buried method.

During construction, first, use sand or clay with a smaller diameter to level the base surface, and then lay the geomembrane. The geomembrane should not be stretched too, and the buried soil at both ends is corrugated. Finally, a transition layer of about 10cm is laid on the geomembrane with fine sand or clay. A 20-30cm block stone (or prefabricated concrete block) is built as an impact protection layer. During construction, try to avoid the stones hitting the geomembrane, and it is best to construct the protective layer while laying the geomembrane. The connection between the composite geomembrane and the surrounding structures should be anchored by expansion bolts and steel plate battens, and the connection parts should be painted with emulsified asphalt (thickness 2mm) to prevent leakage.

Composite geomembrane construction matters

1. The use must be embedded: the thickness of the cover should not be less than 30cm.

2. The renovation anti-seepage system should consist of: a cushion layer, anti-seepage layer, transition layer, and protective layer.

3. The soil body should be solid, to avoid uneven subsidence, cracks, and the turf and tree roots within the anti-seepage range should be removed. Sand or clay with small particle size is laid on the contact surface with the membrane as a protective layer.

4. When laying, the geomembrane should not be pulled too. It is better to embed the soil at both ends into a corrugated shape, especially when it is anchored with rigid materials, there should be a certain amount of expansion and contraction.

5. During construction, stones should be avoided, and heavy objects should be smashed on the geomembrane. It is best to lay the membrane and cover the protective layer during construction.

Composite geomembrane

Composite geomembrane design material (can be customized)

1. Select the appropriate type and specification according to the project nature, category, application site, use conditions, design requirements, etc.

2. Determine the thickness of the geomembrane according to the required strength of the water pressure in the engineering design, as well as the application conditions such as exposure, buried pressure, climate, and service life.

3. Determine the width and length of the geomembrane according to the actual size, area, construction conditions, and construction capacity of the project, and the principle of smallest seams during


4. When the base layer is a concrete structure, it is advisable to choose a filament non-woven composite soil geomembrane that can be bonded to the cement base layer.

5. It is used for anti-seepage treatment on highways. Generally, one geotextile and one geomembrane 200-300g/m are used for anti-seepage at the lower part of the central divider.

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