Fish ponds and aquaculture ponds

Functions

The anti-seepage membrane can effectively prevent water from seeping into the aquaculture pond, control the water level, save water resources, and isolate harmful substances in the soil to ensure clean water quality, which is conducive to the healthy growth of aquatic products such as fish, shrimp, and crabs.

Material recommendations

Black HDPE anti-seepage membranes with a thickness of 0.5mm~1.0mm are often used, which have good UV resistance and corrosion resistance.

Artificial lakes and landscape water bodies

Artificial lakes, ecological pools, fountains and other landscape projects are becoming more and more common, and the anti-seepage membrane mainly plays the role of preventing leakage, maintaining water levels, and isolating pollution sources. Especially in urban greening, a good anti-seepage system can not only save water, but also prevent the surrounding structures from getting damp and soil loss.

Recommended materials: HDPE smooth or double-smooth anti-seepage membrane, thickness 0.75mm~1.5mm, with good ductility and UV stability. For high-end landscape lakes, it is also possible to consider covering the HDPE anti-seepage membrane with geotextile to protect the roots of vegetation.

Sewage treatment tank and regulating tank

The anti-seepage membrane is widely used in sewage treatment plants, biochemical tanks, regulating tanks and other scenes. It is mainly used to isolate sewage from seeping into the ground to prevent water or soil pollution.

Performance requirements:

• Excellent chemical stability, able to resist acid, alkali, salt and organic matter;

• Strong weld airtightness, durability of not less than 20 years;

• High puncture strength and anti-aging.

Common combinations:

• Combined with GCL (bentonite pad) or geotextile to form a multi-layer anti-seepage system;

• Set up drainage ditch and exhaust system to assist long-term stable operation.

Landfill anti-seepage system

Landfill is one of the most typical heavily polluted environments for the application of anti-seepage membranes. Its function is to prevent landfill leachate from entering the ground and polluting water sources.

Anti-seepage systems usually include:

• A layer of HDPE anti-seepage membrane (1.5~2.0mm);

• A layer of bentonite pad (GCL) or clay liner;

• Two upper and lower protective layers (non-woven geotextiles); 

• Composite drainage layer or water collection pipe system.

Tailings pond and mining sedimentation pond

In the mining industry, the bottom of the tailings pond and the yard regulating pond are prone to produce heavy metal leachate, which is extremely harmful to the environment. The anti-seepage membrane acts as an isolation barrier to prevent pollutants from flowing into the groundwater system.

Recommended membrane materials:

• 2.0mm thick reinforced HDPE anti-seepage membrane;

• Must have high puncture resistance and aging resistance;

• Better composite effect with GCL.

Chemical tank and liquid storage tank anti-corrosion layer

Common acid and alkali waste liquid tanks, neutralization tanks, hazardous liquid storage tanks, etc. in the chemical industry have extremely high requirements for anti-seepage layers. HDPE or higher-level LLDPE, PVDF anti-seepage membranes can be used as integrated linings.

Key indicators:

• Chemical corrosion resistance level meets ASTM or GB standards;

• High temperature (≥60℃) and low temperature (≤-20℃) resistance;

• Edge sealing treatment uses welding and mechanical anchoring for double insurance.

Tunnel and subway waterproofing layer

In underground tunnels and urban subway projects, waterproofing systems are crucial to operational safety. The anti-seepage membrane can be combined with waterproof membranes, water stop strips, etc. to form multiple protective barriers.

Application forms:

• Laying between the sprayed concrete and the structural layer;

• Combining hot melt welding with mechanical anchoring; 

• Integrating the double-layer membrane with the water leakage monitoring system.

Road and railway subgrade isolation layer

In transportation projects such as roads and railways, HDPE membranes are often used as isolation layers, anti-seepage layers or stabilization layers to prevent rainwater from entering the base layer and inhibit soil migration.

Typical applications:

• Anti-seepage membranes are set under the anti-freeze heave layer;

• High fill subgrades prevent water from seeping in;

• Strengthen waterproofing near tunnel entrances and culverts.

Waterproofing of building basements and green roofs

In urban buildings, anti-seepage membranes are used for waterproofing of basement floors, side walls, garage roofs and roof gardens, which can effectively block groundwater or rainwater from invading building structures.

Construction form:

• Pre-paved anti-adhesive HDPE membrane;

• Thermal welded seams seal the waterproof layer;

• The surface is covered with planting soil or concrete protective layer.

Salt field and storage yard closed covering

HDPE membrane is also widely used in temporary or permanent closures such as salt fields, aquatic product drying fields, fertilizer storage areas, coal yards, and construction waste storage yards.

Functional manifestations:

• Control rainwater infiltration and prevent leaching pollution;

• Prevent harmful gas from escaping;

• Improve salt drying efficiency or stockpile cleaning standards.