1m-8m Width Hdpe Geomembrane Sheet for Farming Agricultural Dam Landfill Site Fish Pond

Farming Agricultural Dam Landfill Site Fish Pond HDPE Geomembrane Lined with Impermeable Plastic Film

Lining of reservoirs with synthetic geomembranes separates the liquid mass from the soil.

What is the service life of geomembrane?

The service life of geomembrane is affected by many factors such as material type, use environment, construction quality and maintenance measures, as follows:

Material type and life span

1. HDPE geomembrane

• Underground/underwater use: High-quality HDPE (new material + anti-aging agent) can last up to 50-100 years, and some studies show that the stability of polypropylene materials can exceed 100 years.
• Exposed use: HDPE membrane with anti-ultraviolet agent has a life span of about 5-10 years, while ordinary recycled materials have a life span of only 2-3 years.

2. LDPE/EVA geomembrane

• LDPE has poor low temperature resistance, and EVA is suitable for cold areas, but its life span is generally shorter than HDPE, and it can be used underground for about 30-50 years.

3. PVC/CPE geomembrane

• Short life span, usually 10-30 years, and susceptible to chemical corrosion.

Key Influencing Factors

1. Use environment

• Light-proof environment (underground/underwater): UV rays, temperature changes and oxidation are weak, and the service life is significantly extended.
• Exposure environment: UV rays accelerate photo-oxidation aging, shortening the service life to less than 5 years.

2. Material quality

• New materials: high tensile strength, strong corrosion resistance, and service life far exceeds that of recycled materials.
• Additives: Antioxidants and UV absorbers can delay aging.

3. Construction and maintenance

• Welding process: The strength of hot-melt welding seams must reach more than 80% of the parent material, and manual bonding is prone to leakage.
• Protective layer: Covering with non-woven fabrics or clay over 200mm can prevent mechanical damage.

Welding machine(thickness from 0.2-1.5mm)            Welding machine(thickness from 0.2-2.5mm)

Measures to extend service life

1. Choose high-quality materials: give priority to new HDPE materials with a thickness of ≥0.5mm.

2. Avoid exposure: If exposure is required, cover with grass fences, felt or thicken to more than 2.0mm.

3. Standard construction: Strictly weld according to standards and reserve expansion margin (1.5%-2%).

4. Regular maintenance: Check for damage and repair in time to prevent chemical corrosion

Conclusion

The upper limit of the life of geomembrane can reach 100 years, but in actual application, it is necessary to combine material selection, construction specifications and environmental protection. It is recommended to give priority to the use of new material HDPE, and extend its service life through measures such as light protection and protective layer covering.

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