Pipes, Drainage & Ducting
GeoDrain LD 750 – 1300 kN/m² Cuspated Leak Detection Core for Double Liner Systems
GeoDrain LD 750 is the highest compressive strength core in the range at 1300 kN/m², for deep cells and high-load containment where structural capacity governs. Tested to ASTM D7361, it retains 87.39% of thickness under 500 kPa over a 100-year design life, with High Pressure OIT above 600 minutes. Supplied in 2.35–4.7m × [45m] rolls.
Overview
GeoDrain LD 750 - Heavy-Duty Leakage Detection & Gas Venting Core for Double Liner Systems
GeoDrain LD 750 is engineered for the highest-load leakage detection applications: deep landfill cells, tailings storage facilities (TSFs), and process water dams carrying heavy cover material. Installed as the leakage detection layer between a primary and secondary geomembrane, it provides continuous, measurable early warning if either liner is ever compromised, while the same open flow-channel structure allows it to double as a gas venting layer beneath a liner where landfill gas migration needs to be controlled and directed to a vent point.
The core is formed from a dense field of HDPE dimples (over 23,000 per square metre), keeping the sheet rigid enough to resist crushing under sustained load while leaving open channels for leachate, gas, or leak fluid to travel laterally to a collection sump or monitoring point. The dimpled profile keeps both liners in full, even contact with the core across the sheet, so there are no dead zones and no gaps in leakage detection coverage.
Compression resistance is rated at 1300 kN/m2, the highest in the GeoDrain LD range, with a CBR puncture resistance of 500N. Long-term creep and thickness-retention data (over 87% retained thickness at 500 kPa across a 100-year design life) means the flow channel doesn't crush shut over time, which matters for containment systems and TSFs designed to operate for decades. Even fully loaded between two rigid liners at 500 kPa, LD 750 still carries measurable in-plane flow, keeping leakage detection and gas venting performance intact under full load.
Typical applications: leakage detection layer between primary and secondary liners on Class A landfill barrier systems, tailings storage facilities, mine residue deposits, process water and evaporation dams, and gas venting layers beneath geomembrane liners on any double liner system with severe cover loads.
- MaterialHDPE (Polyolefin mix with PP)
- StructureSingle cuspated (dimpled) core
- ColourBlack
- StandardTested to ASTM D1621, EN ISO 9863-1, EN ISO 10319, EN ISO 12958
- Roll Width2.35 m
- Roll Length55 m
Typical Properties
| Property | GeoDrain LD 420 | GeoDrain LD 500 | GeoDrain LD 700 | GeoDrain LD 6 |
|---|---|---|---|---|
| Primary Application | Landfill leak detection · standard cells | Landfill leak detection · intermediate load | Deep cells · high-load containment | Liner drainage · venting · light containment |
| Dimple Type | Single cuspated | Single cuspated | Single cuspated | Single cuspated |
| Compressive Strength | 700 kN/m2 | 1000 kN/m2 | 1300 kN/m2 | 800 kN/m2 |
| Thickness at 2 kPa | 4.9mm | 5.0mm | 5.0mm | 6.0mm |
| Raw Material | Polyolefin mix | Polyolefin mix | Polyolefin mix | HDPE |
| Roll Length | 60m | 55m | 45m | 100m |
| Roll Width | 2.35m - 4.7m | 2.35m - 4.7m | 2.35m - 4.7m | 0.97 |
Note: The above specifications represent the product family properties. Please refer to the product datasheet for individual SKU values.
Typical Applications
View all applicationsLandfill Leak Detection Systems
GeoDrain LD cuspated cores provide the leak detection drainage layer between primary and secondary geomembranes in municipal solid waste, industrial waste and hazardous waste landfill cells. Leachate passing through the primary liner transmits in-plane to collection sumps where flow rate is monitored for liner integrity assessment.
Containment Bund Lining Systems
Industrial containment bunds for chemical storage, fuel storage and process facilities require a leak detection layer between double geomembrane liners. GeoDrain LD provides the drainage core at compressive strengths matched to the bund loading and fluid chemistry requirements.
Tailings Storage Facilities
Tailings storage facilities impose high and sustained overburden loads on lining system components. The GeoDrain LD 700 at 1300 kN/m2 with confirmed 100-year creep performance to ASTM D 7361 is specified for TSF leak detection layers where long-term load retention is a regulatory and design requirement.
Dam and Reservoir Lining Systems
Water storage dams and lined reservoirs use GeoDrain LD sheets as the drainage and leak detection layer beneath the primary geomembrane liner. The smooth cuspated interface protects the liner from subgrade contact damage while providing a drainage path for any seepage to monitoring points.
Compatible Systems
View all systemsGeoDrain LD 420 - Leak Detection Cuspated Core
The LD 420 is a single cuspated polyolefin mix drainage core at 700 kN/m2 compressive strength for leak detection applications in standard landfill cells and containment systems. Installed between primary and secondary geomembranes, it transmits leachate flow in-plane to collection points while maintaining a smooth interface against both membrane faces. Roll width 2.35m to 4.7m, roll length 60m. CE certified to EN 13252.
GeoDrain LD 500 - High-Load Leak Detection Core
The LD 500 is a single cuspated polyolefin mix drainage core at 1000 kN/m2 compressive strength for intermediate to high-load landfill cells and containment bunds. High Pressure OIT above 600 minutes confirms antioxidant retention under aggressive leachate conditions. Retained thickness of 92.89% at 200 kPa over a 100-year design life. Roll width 2.35m to 4.7m, roll length 55m. CE certified to EN 13252.
GeoDrain LD 700 - Ultra High-Load Leak Detection Core
The LD 700 is the highest compressive strength product in the GeoDrain LD range at 1300 kN/m2. Designed for deep landfill cells, high-load containment facilities and tailings storage where sustained overburden loading is a long-term design consideration. Retains 87.39% of thickness at 500 kPa over a 100-year design life confirmed by ASTM D 7361 creep testing. High Pressure OIT above 600 minutes. Roll width 2.35m to 4.7m, roll length 45m. CE certified to EN 13252.
GeoDrain LD 6 - 6mm HDPE Cuspated Drainage Core
The LD 6 is a 6mm HDPE single cuspated drainage core at 800 kPa compressive strength for liner drainage, passive gas venting and leachate transmission in containment applications. The narrow 0.97m roll width suits detailed lining system work and edge drainage configurations. Maintains in-plane flow capacity of 2.0 l/(m·s) at hydraulic gradient i=1 from 20 kPa to 200 kPa load. Also available with bonded PP geotextile filter layer on request. Roll width 0.97m, roll length 100m.
Installation Guidance
Standard Method Statement
Subgrade and Liner Preparation - The geomembrane surface receiving the GeoDrain LD sheet must be inspected and accepted before installation. Remove any debris, aggregate or projections that could damage the cuspated core or the geomembrane interface. Install only after primary geomembrane welding and testing is complete.
Roll Placement and Orientation - Unroll GeoDrain LD sheets in the machine direction with the cuspated core face down against the primary geomembrane. Avoid dragging rolls across the geomembrane surface. On slopes, anchor the top edge before unrolling downslope to prevent sheet movement under self-weight.
Overlaps and Joins - Overlap adjacent sheet edges by a minimum of 300mm. Ensure overlaps are consistent and that no gap exists in the drainage plane between geomembranes. Do not weld or heat-bond the cuspated core - overlaps are maintained by the weight of the overlying geomembrane and overburden.
Secondary Geomembrane Placement - Place the secondary geomembrane directly over the GeoDrain LD sheet. The smooth cuspated surface provides a stable low-damage interface for geomembrane deployment and welding. Do not rest welding equipment directly on the cuspated core - use bridging boards at weld locations if required.
UV Protection and Cover - Cover GeoDrain LD sheets within 28 days of installation. Place the next lining system layer as soon as practicable after secondary geomembrane acceptance. Do not stockpile heavy equipment or materials directly on the installed drainage layer before adequate cover is in place.
Quality Assurance & Testing
Field QA/QC Checklist
- Delivery & Storage: Materials checked against the delivery note and conformance certificates, stored off the ground, covered from UV and kept clear of sharp objects and fuel.
- Material Conformance: Certificates checked for transmissivity (ASTM D4716 / ISO 12958) at the design load and, for composites, ply adhesion.
- Orientation: Laid with the flow direction downslope and the correct side facing the soil or geomembrane.
- Overlaps & Ties: Core panels overlapped or butted and tied at the spacing in the manufacturer's guide; geotextile flaps overlapped or sewn.
- Cover: Covered promptly with the specified material, avoiding damage to the underlying geomembrane.
Manufacturing Standards
- ASTM D4716 / ISO 12958 in-plane flow capacity
- Manufacturer installation guide
- Manufacturer QC certificates per roll
- Tested to ASTM D1621, EN ISO 9863-1, EN ISO 10319, EN ISO 12958
Documents
Product Selection Guide
Compare performance properties across the entire category hierarchy before specifying.
Installation & Method Statement
Standard deployment procedures, installation specifications, and field application method statements.
QA/QC Site Checklist
Field quality control procedures, inspection checklists, and testing standards to verify installation integrity.
Technical Data Sheet (TDS)
Guaranteed minimum average roll values (MARV) and material testing properties.
Chemical Resistance / Accessories Guide
Chemical compatibility matrix and list of auxiliary materials needed for installation.
Projects Using GeoDrain LD 750 – 1300 kN/m² Cuspated Leak Detection Core for Double Liner Systems
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