Geomembrane Liner Testing

Geomembrane liners are used in various applications, including environmental containment systems, water management, and construction projects. The integrity of geomembrane liner welds is critical to prevent leaks, maintain environmental protection, and ensure structural stability. Several tests and quality control measures are employed to assess the quality of geomembrane liner welds.

Spark Testing

Spark testing is a non-destructive method used to detect pinholes, punctures, or defects in geomembrane liners. An electrical spark is applied to the liner's surface, and if a defect or discontinuity is present, it will create a spark.

Destructive Testing

Destructive testing involves removing samples of geomembrane liner welds for laboratory analysis. Common destructive tests include:

Peel Test: This test measures the peel strength, or the force required to separate the welded geomembrane layers. It assesses the integrity of the weld.

Tensile Test: Like ASTM D638 for plastics, a tensile test can assess the weld's tensile strength and elongation properties.

Shear Test: Shear testing evaluates the shear strength of the weld by applying a force parallel to the weld seam.

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