Leak Drainage A guide to the selection and specification of Leak Drainage Systems for use in Mineworks and Municipal Solid Waste containment systems.

Mine Waste and MSW containment systems, especially those designed for containing hazardous materials, are lined using a dual liner system. Positioned below the primary liner and above the secondary liner is a drainage layer designed to collect leakage and often called a Leak Detection System (LDS). Any leakage through the primary liner must be intercepted by the drainage layer and then quickly and effectively directed to a collection point. The main purpose of this drainage layer is to reduce the hydrostatic head on the secondary liner thereby minimizing the risk of contaminants entering the...

Leakdrain Leakdrain is designed specifically as a drainage layer between primary and secondary barriers in containment systems and is widely used in the construction of landfill cells, mine waste storage facilities and lagoons. It comprises a single cuspated core with very high long-term compressive strength and high in-plane multi-directional flow capacity. Should a leak occur in the primary liner then these characteristics allow the safe removal of leachate and other particle laden liquids without risk of clogging, even under the high loads associated with these applications. Pozidrain comprises...

Selecting the Drainage Layer Chemical Resistance The key performance is the in-plane flow capacity (l/m·s) under long-term load and with minimal hydrostatic head. Optimisation of these criteria implies that the leak drainage layer is relatively thin, with extremely high in-plane permeability (m/s) and excellent resistance to creep at design load. All materials used in the lining system must able to withstand prolonged contact with any pollutants contained. Leakdrain is manufactured from HDPE which is used extensively in forming lining systems and is capable of withstanding long-term exposure...

Comparative Performance Tailored product required contact ABG Leakdrain is available in three core thickness grades 3mm, 5mm and 6mm and in three strength grades Standard, Super and Hyper for long-term loadings up to 250kPa, 500kPa and 1000kPa respectively. The chart shows indicative performance plotting flow rate in the machine (MD) and cross-machine direction (CMD) against long-term load for 100 years duration. Flow in MD and CMD directions allows Leakdrain to be used on gradients in multiple directions. This chart is intended as a quick indicator of flow capacity at a range of pressures. The...

Groundwater Drainage Veneer Soil Stability Site investigations frequently reveal the presence of groundwater within the development area. Even small amounts of groundwater can create difficult conditions for construction of the containment facility. Groundwater may also create damaging buoyancy forces on the containment barrier layer. Geomembranes are often protected by a thin veneer of cover soil placed directly over the top. The poor friction interface between the soil and the geomembrane can lead to instability and possible erosion occurrences in the soil layer. Pozidrain is an effective groundwater...

This literature together with technical data, specifications, design guidance, technical advice, installation instructions or material can be obtained by contacting ABG Ltd. All information in this brochure is supplied in good faith, and without charge, to enable a reasonable assessment of the practical performance of our products. Final determination of the suitability of any information or material for the use contemplated and the manner of its use is the sole responsibility of the user. As design and installation is beyond our control no warranty is given or implied and the information does...