To guarantee an effective cover the landfill cap should incorporate a drainage layer above and a gas collection layer below the cap lining system.  Finesse Pozidrain will provide these functions with higher performance and lower cost than conventional crushed stone filters. Pozidrain has been specially designed to be compatible with both HDPE and clay liners and to give the optimum performance over the whole life of the landfill capping. Pozidrain will enhance the performance of the GCL or HDPE liners by providing an additional barrier that prevents the majority of the water or gas reaching the liner. Pozidrain geocomposite drainage layer has a proven record in landfill capping.

Pozidrain installed over a geomembrane, within the geosynthetic landfill cap, will collect and drain rain water from the soil cover. This will prevent saturation and ensure the capping soil remains stable.

GAS COLLECTION & DISPERSION

Pozidrain below the landfill cap geomembrane will form the basis of a very efficient gas collection and dispersal system. Installed with the flat face of the core against the liner and dimpled face against. Pozidrain will also provide a high level of protection to the lining system.

GEOMEMBRANE PROTECTION

Pozidrain has a smooth flat core that has the optimum design to reduce the contact stress on the geomembrane. The high CBR puncture resistance of Pozidrain cushions the geomembrane from sharp material in the landfill waste.

GROUND WATER DRAINAGE

Pozidrain below the landfill base geomembrane will act as a ground water drainage system. Installed with the flat face of the core against the liner and dimples against the subformation, Pozidrain will also provide a high level of protection to the lining system.

Finesse Pozidrain geocomposite drainage layer has major advantages over conventional drainage stone. It has hydraulic properties designed for reliable and sustainable performance. The mechanical resistance of the material is sufficient to endure installation and long term loading. Pozidrain reduces the stress on the geomembrane (as demonstrated by the cylinder test) and provides protection against puncture. A significant number of landfill sites have utilised the benefits of Pozidrain.

LEAKAGE DETECTION

Pozidrain installed between a primary and secondary geomembrane forms the basis of an efficient detection system. Pozidrain will not only identify the presence of a leak but also has sufficient capacity to collect the discharge and guide it safely to a collection point until repairs can made.

Pozidrain installed over a geomembrane, within the geosynthetic landfill base, will collect and drain leachate from the waste body above. The large voids within the 0 core provide high resistance to biological clogging. As with conventional materials a 200 mm blinding layer is typically provided above the Pozidrain.