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Composite geomembrane selection tips

RELEASE TIME :

2021-07-06 14:38

At present, there is no composite geomembrane suitable for all occasions. From the perspective of its wide application and design innovation, there is no need for uniformity. Therefore, there is a matter of choice. To correctly design and select the type of composite geomembrane, first of all, it is necessary to clarify its role in specific use and put forward technical requirements, and then according to the specific use environment and the functions and properties that should be possessed at this time, the type of composite geomembrane should be determined. reverse.

复合土工布的选择窍门

There are many types of composite geomembranes, which have different functions and functions in different applications. It can be used in transportation, water conservancy, environment, coastal engineering, etc. And it has nine functions such as drainage, filtration, separation, reinforcement, tension balance, erosion control, stress dispersion, shielding and containment.

The physical performance requirements of composite geomembranes are different in different applications. In addition, the composite geomembrane should have certain chemical properties. According to each specific project, some technical requirements are put forward accordingly.

What is the basis for the selection of raw materials for composite geomembranes?

1. Good physical and mechanical properties

The working environment of the composite geomembrane is harsh, and in many cases it is soaked in water or laid in high-humidity soil, so it has good hydrolysis resistance and wet mechanical properties.

2. Good water permeability

Composite geomembrane filter drainage requires water permeability, so it has good water permeability.

3. Chemical resistance, corrosion resistance and mildew resistance

Water and soil are very different. Some are alkaline, some are acidic, some contain more salt, and some contain various elements, so they are chemically stable.

Four, UV resistance, hydrolysis resistance, high and low temperature resistance

The composite geomembrane should be exposed to sunlight and have corresponding anti-ultraviolet ability; when the composite geomembrane is in contact with asphalt and other materials, it must adapt to the temperature and has a higher requirement for melting point.

Composite geomembranes are composed of two or more types of composite geomembranes and other materials with different functions and types. Composite materials can be spunbond or needle punched nonwovens, woven fabrics, polyethylene films, plastic meshes, plastic tubes, etc.

 

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