What standards does the European standard geomembrane need to meet?
European geomembranes need to comply with a series of relevant European standards, which are usually formulated and managed by the European Committee for Standardization (CEN). Here are some of the main European standards related to geomembranes:
EN 13361 – General requirements for geomembrane materials and products: This standard specifies the general requirements for geomembranes, including material properties, mechanical properties, chemical properties, dimensional stability, weldability, etc.
EN 13491 – Chemical properties of geomembranes: This standard covers the requirements for the chemical properties of geomembranes when in contact with water and soil to ensure their persistence and stability in the environment.
EN 13492 – Mechanical properties of geomembranes: This standard specifies the performance requirements of geomembranes under mechanical stress, including tensile strength, tear strength, puncture strength, stiffness, etc.
EN 13493 – Dimensional stability of geomembranes: This standard specifies the dimensional stability requirements of geomembranes to ensure that they do not undergo significant dimensional changes under conditions of use.
EN 13967 – Permeability properties of geomembranes: This standard covers the requirements for the permeability properties of geomembranes, including water permeability and gas permeability.
EN 14414 – Aging resistance of geomembranes: This standard specifies the performance requirements of geomembranes under aging conditions to evaluate their long-term stability under different environmental conditions.
EN 15295 – Welding performance of geomembranes: This standard specifies the welding performance requirements of geomembranes, including hot air welding, high frequency electronic welding, friction welding and other methods.
EN 15381 – Installation and construction of geomembranes: This standard covers the requirements for the installation and construction of geomembranes, including preparation of foundations, welding techniques, joint treatment, etc.
Geomembrane physical properties
Thickness: The thickness of a geomembrane refers to its thickness measurement in the vertical direction, usually in millimeters (mm). Thickness affects the strength, abrasion resistance and puncture resistance of geomembrane.
Mass density: Mass density represents the mass of the geomembrane per unit volume, usually expressed in grams per cubic centimeter (g/cm³). Mass density can affect the weight, softness, and durability of geomembranes.
Tensile strength: Tensile strength refers to the maximum stress that the geomembrane can withstand under the action of tension. Usually expressed in units of megapascals (MPa). Tensile strength is used to evaluate the strength and endurance of geomembranes during construction.
Elongation at break: Elongation at break refers to the ductility of the geomembrane before failure, usually expressed as a percentage (%). A higher elongation at break indicates that the geomembrane has better flexibility and resistance to rupture.
Tear Strength: Tear strength refers to the geomembrane’s ability to resist when subjected to cutting or tearing stress. Usually expressed in Newtons (N). Tear strength is used to evaluate a geomembrane’s resistance to cutting and tearing forces.
Gas permeability: Gas permeability refers to the ability of a geomembrane to pass through gas. By measuring the amount of gases such as oxygen and carbon dioxide that pass through the geomembrane per unit time, it is usually expressed in volume units.
Geomembrane mechanical properties
Tensile strength (tensile strength): The tensile strength of a geomembrane refers to its load-bearing capacity under tensile force, usually measured in megapascals (MPa). Tensile strength evaluates the ability of a geomembrane to resist tensile stress, which is a very important performance indicator in different engineering applications.
Tear strength: Tear strength refers to the ability of the geomembrane to resist tearing stress. It is usually measured in Newtons (N). Tear strength evaluates a geomembrane’s ability to withstand punctures and tears.
Puncture Strength: Puncture strength measures the ability of a geomembrane to withstand puncture by sharp or sharp objects. It is usually measured in Newtons (N).
Stiffness: The stiffness of a geomembrane refers to its ability to recover from external forces or its resistance to deformation. Stiffness is usually related to the thickness of the geomembrane and the properties of the material.
Creep: Creep refers to the time-dependent deformation of the geomembrane under continuous loading with constant stress. The ability of geomembranes to resist creep is important for applications with long-term operating loads.
