AGRU Conductive Liner possesses higher carbon loading compared with other polyethylene-based liners, allowing this specialty liner to conduct electrical charges. This feature allows Construction QA/QC Testing searching for possible holes, punctures, tears, cuts, cracks, and similar breaches over the partial or entire area of an installed geomembrane using either test method ASTM D7240-18. These tests use an electrically charged wand or dipole apparatus to locate electric flow through such breaches to the subgrade soil beneath. In the case of AGRU’s conductive liner, the electrical charge can flow along the underside of the liner, thus can be used on the primary (not in contact with the subgrade) in double-lined applications.
Conductive liner is implemented for improved quality control processes by removing the reliance on the human eye for post-installation inspections. One unique feature of AGRU’s Conductive Liner is its improved strength and elongation strength qualities when compared with the industry standard.
Conductive liners can be utilized in many applications across many industries and projects including combustion residuals, environmental, civil engineering, mining, waste closure and containment, tunnels, waste and waste water, and energy, oil, and gas. However, because conductive liner is specifically designed for spark testing leak detection, it is most often used whenever the geomembrane is exposed. Standard dipole surveys are commonly used on projects with soil cover above non-conductive membranes.
AGRU possesses the manufacturing capability to deliver fully customized geomembranes or even complete systems to meet an array of project requirements. AGRU White Conductive Liner with MicroSpike, for instance, possesses all the qualities of white liner, conductive liner, and AGRU MicroSpike to deliver geomembrane with improved slope stability, spark test leak detection, and white reflective surface for improved thermal resistance. The final product uses industry leading polyethylene resins that sets AGRU geosynthetic products apart to exceed industry standards in strength and durability.
- Conductive geomembrane incorporates a thin coextruded conductive bottom layer that allows for spark testing per ASTM D7240 without the need for water.
- The area is swept with a brush-like test wand to locate points where the capacitor discharges through a leak. When the system senses the discharge current, it is converted to a visible spark and audible alarm.
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