What standards should European standard geotextiles meet?
European standard geotextiles 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 geotextiles:
EN 13249 – General requirements for geotextile materials and products: This standard specifies the general requirements for geotextiles, including requirements for material properties, physical properties, mechanical properties, etc.
EN 13250 – Physical properties of geotextiles: This standard covers the physical performance requirements of geotextiles, including quality, thickness, water permeability, air permeability, etc.
EN 13251 – Mechanical properties of geotextiles: This standard specifies the performance requirements of geotextiles under mechanical stress, including tensile strength, tear strength, puncture strength, stiffness, etc.
EN 13252 – Weathering properties of geotextiles: This standard specifies requirements for the weathering properties of geotextiles under different climatic conditions to ensure their long-term stability when used outdoors.
EN 13253 – Chemical properties of geotextiles: This standard covers the requirements for the chemical properties of geotextiles when in contact with soil and water to ensure their compatibility and durability to the environment.
EN 15381 – Installation and construction of geotextiles: This standard specifies requirements for the installation and construction of geotextiles, including aspects such as pretreatment, anchoring and fixing methods.
Chemical properties of geotextiles
The chemical properties of geotextiles are related to their durability and compatibility under specific environmental conditions. The following are some of the main aspects related to the chemical properties of geotextiles:
Corrosion Resistance: Geotextiles should have some corrosion resistance so that they can maintain their performance and structural integrity when exposed to different chemicals or soils. It should have properties such as acid and alkali resistance and salt resistance to meet the needs of different application environments.
Anti-aging: When geotextiles are exposed to ultraviolet rays, oxidation, high temperature and other factors in outdoor environments, they should have certain anti-aging properties to extend their service life and performance.
Chemical stability: Geotextiles should be chemically stable and should not react adversely with or dissolve chemicals in the soil. For specific application environments (such as water pollution prevention and control), the chemical stability of geotextiles is particularly important.
Environmental compatibility: Geotextiles should be environmentally sound and compatible when in contact with soil, water and environmental organisms (such as microorganisms, plant roots). This helps ensure that geotextiles do not negatively impact soil quality and ecological environment.
Permeability: Geotextiles usually have a certain degree of permeability, allowing moisture and gas to pass between the geotextile and the soil. Permeability is essential for soil drainage and aeration.
Physical properties of geotextiles
The physical properties of geotextiles are one of the key indicators for evaluating their performance in engineering and soil stabilization applications. The following are common physical performance indicators of geotextiles:
Mass density: The mass density of geotextile represents the mass of geotextile per unit volume, usually in grams per square meter (g/m²) or grams per cubic meter (g/m³). Mass density affects the weight and durability of geotextiles.
Thickness: The thickness of a geotextile refers to its measurement in the vertical direction, usually in millimeters (mm). Thickness affects the strength, flexibility and puncture resistance of the geotextile.
Tensile strength: The tensile strength of a geotextile represents its maximum load-bearing capacity under tension, usually in megapascals (MPa) or Newtons per meter (N/m). This is an important parameter for evaluating the performance of geotextiles under tensile and stress conditions.
Elongation at break: Elongation at break refers to the ductility of the geotextile before failure, usually expressed as a percentage (%). A higher elongation at break indicates that the geotextile has better flexibility and resistance to rupture.
Tear strength: Tear strength refers to the resistance of geotextiles when subjected to cutting or tearing stress, usually measured in Newtons (N). This is critical to the durability of the geotextile during construction and application.
Gas permeability: Gas permeability refers to the gas permeability of the geotextile, usually expressed in volume units. This is important in some applications, such as geotextiles for drainage or gas control.
Water permeability: Water permeability is the performance of the geotextile that allows water to pass through, usually expressed in flow units, such as liters per second (L/s). This is a critical performance for geotextiles in applications such as drainage, soil water storage, or soil erosion prevention.
UV stability: UV stability refers to the anti-aging performance of geotextiles under ultraviolet irradiation. Geotextiles with good UV stability can maintain their performance longer in outdoor environments.