High Density Polyethylene (HDPE) is available in thicknesses from 0.7mm to 3mm and is produced with either smooth or textured surfaces. HDPE geomembranes are fusion-welded together to produce a geomembrane lining system that can provide a completely impermeable barrier to seal substances in or out.
Typical applications for HDPE geomembranes include environmental containment systems for the protection of groundwater including Brine Storage Ponds, Water Conveyance Structures, Landfill Cell Linings and Evaporation Ponds. HDPE geomembranes are manufactured to meet and exceed the GRI GM13 specification.
Advantages of HDPE Geomembranes:
- Extremely Versatile
- Excellent Chemical Resistance
- High UV Resistance
- High Stress Crack Resistance
- Proven durability and longevity
LDPE & LLDPE
LDPE (Low Density Polyethylene) & LLDPE (Linear Low Density Polyethylene) has many of the same characteristics as HDPE but is more flexible and may be folded. It is also not quite as chemical or UV-resistant as HDPE. Usually Potable grade and often preferred for floating covers.
GCL (Geosynthetic Clay Liner) is comprised of a layer of Sodium Bentonite/ Montmorillonite captured between 2 geotextile layers. It can be used as a Primary liner (confined under an earth backfill layer), but is more often used as a secondary liner under a HDPE or other Primary liner.
Geotextile is available either woven or non-woven. It is a type of filter cloth that comes in various grades and thicknesses. Often used as a protective layer under a geomembrane liner, or as a cushion layer over a geomembrane liner to protect that liner from “bruising” when backfilling (e.g. in a Landfill). Used as a filter either side of a Hypernet/Drainage Net.
Polypropylene (PP) is available as un-reinforced or with a reinforcing scrim which may be useful in a floating cover. It is more flexible than HDPE which makes it more user-friendly but it is not as thermo-responsive (less rippling in sunlight), nor as durable. Thinner gauges are suitable for prefabricated liners up to approximately 2,500 m².
Enviro Liner® 6000
Canvacon (the genuine Australian-made coated/woven Poly) has been used to line ponds and dams for over 30 years. It can be pre-fabricated into large sheets and transported to you for potential DIY installation. Genuine Canvacon will last up to 6 years exposed in the Australian sun, but much longer if buried.
PE or PP formed into a net or lattice that allows fluids to flow through. Often used as a “spacer” between the Primary and Secondary geomembrane liner so that if the Primary Liner should leak, the fluid will drain (into the leak-collection sump) quickly and without head build-up.
Two or more of the above textiles bonded together. For example, a Drainage Net encapsulated in a Non-Woven Geotextile. The geotextile filters out finer particles (silt/clay) that would otherwise tend to clog the drainage net. May be used under a liner system in contact with the soil /CCL subgrade to handle Groundwater.
E-Vap Cap was developed for use in Evaporation Control Covers. It is designed to float on top of the dam and inhibit the water from evaporating. In the event of rain, there are drainage holes throughout the material, allowing water to seep into the storage facility. For more information go to www.evaporationcontrol.com.au.