Landfill & Mining
ALFDRAIN GEOCOMPOSITES REPLACE THICK AGGREGATE DRAINAGE AND GAS VENTING LAYERS.
BASAL DRAINAGE & PROTECTION
Modern landfill design requires a leachate drainage layer up to 500mm thick at the base of the cell. Aggregate drainage layers are expensive, use critical landfill space and add huge stress on the geomembrane.
ALFDRAIN is a composite drainage layer replaces aggregate and geotextile layers.
BASAL DRAINAGE & PROTECTION
Modern landfill design requires a leachate drainage layer up to 500mm thick at the base of the cell. Aggregate drainage layers are expensive, use critical landfill space and add huge stress on the geomembrane.
ALFDRAIN is a composite drainage layer replaces aggregate and geotextile layers.
BENEFIT OF ALFDRAIN
- Reduces use of expensive and scarce primary aggregate.
- Increases productive volume of landfill.
- Reduced haulage of construction materials to site – a single truck of ALFDRAIN can replace up to 50 trucks of aggregate, delivering benefits to both client and contractor.
- Reduced material cost, transport and installation costs.
- The CQA inspection can be carried out in a factory environment.
Guaranteed drainage performance – even with large deformation and soil pressure
Excellent durability – guaranteed as 100% prime grade virgin polymer
Meets all Environment Agency requirements for drainage composites
Tested to 100 years durability to all EN standards
Excellent interface friction properties
LANDFILL CAPPING
Typical components within a final cover system of
a modern landfill comprise of
- An erosion control layer(top soil)
- A protection layer
- A drainage layer
- A barrier layer
- A gas venting layer
- A foundation layer
Design practices vary from site to site and as a result of national regulation and local conditions.State of the art design in landfill engineering has evolved from the use of natural soils to factory manufactured geosynthetics which allow for improvements in safety, reduced environmental impact and economic savings.
PROTECTION & DRAINAGE LAYER
Combined protection and drainage can be achieved using ALFDRAIN composites, manufactured from 100% prime grade virgin polymer offering proven durability. ALFDRAIN composites can also be used below a capping membrane to provide an effective pathway for control and extraction of landfill gasses.
ALFDRAIN have been designed to provide a combination of membrane protection and drainage, offering a robust passage for both liquids and gasses.
The drainage core is manufactured from 100% virgin HDPE polymers surrounded by a strong durable filter that combines high permeability with an excellent impassable soil barrier.
GAS VENTING
ALFDRAIN gas venting layers are engineered to perform as a gas collection and venting system. They
may be used both in passive and active gas collection system.