This standard specifies the laboratory test methods for determining the general characteristics and mechanical properties of geomembranes used in buried civil engineering applications. It provides detailed procedures for crucial tests like thickness, mass per unit area, wide-width tensile strength, tear resistance, and puncture resistance.
Specifies general characteristics, terminology, sampling and methods of test for geomembranes.
Quick Reference Values
Pressure for thickness measurement2 ± 0.01 kPa
Presser foot area for thickness measurement25 cm²
Specimen width for wide-width tensile test200 mm
Gage length for wide-width tensile test100 mm
Rate of extension for tensile test10 mm/min
Diameter of plunger for static puncture test50 mm
Key Formulas
Tensile Strength (kN/m) = F / Ws (where F is max force, Ws is specimen width)
Nominal Thickness (mm) = Average of 10 measurements taken across the roll width
Practical Notes
Ensure proper sampling from rolls as per the standard's guidelines to get representative results for quality assurance.
Specimen conditioning (temperature and humidity) before testing is critical for these polymer-based materials and significantly affects test outcomes.
The wide-width tensile test (Annex B) is more representative of in-situ stress-strain behavior than narrow strip tests commonly used for plastics.