What are the specifications of geomembrane

Geomembrane is a kind of thin film made of high polymer material, which is mainly used for impermeability, impermeability and isolation in civil engineering. The thickness of the geomembrane is generally 0.2mm-4.0mm, the commonly used specifications are 0.5mm, 1.0mm, 1.5mm, etc., the width is generally 2m-8m, and the length can be customized according to needs.
Geomembrane specification parameters
• Thickness: The thickness of the geomemofilm is one of the key indicators to measure its impermeability, and the common thickness ranges from 0.1mm to 3mm, the specific selection is based on the engineering design requirements and the expected impermeability level. For example, high-density polyethylene (HDPE) geomembranes are available in different thicknesses from 0.2mm to 2.0mm to accommodate water pressure and service conditions at different depths.
• Width: In order to meet the laying needs of different engineering projects, the width of the geomembic design is flexible, usually between 2m and 8m, and some manufacturers can customize wider sizes according to customer requirements to reduce the number of welded joints, thereby improving construction efficiency and anti-seepage effect.
• Length: the length of the geomembrane sheet is generally determined according to the convenience of transportation and construction, the common length is 50m, 100m or longer, and the maximum length can reach thousands of meters, in order to facilitate continuous laying to reduce the interface and improve the overall continuity and stability of anti-seepage.
use
• Environmental protection projects: such as the impervious layer of landfill sites and sewage treatment ponds to prevent pollutants from penetrating and polluting groundwater.
• Water conservancy engineering: seepage prevention and reinforcement of reservoirs, channels and DAMS to effectively control water leakage and protect water resources.
• Agricultural applications: such as waterproofing and isolation of fish ponds, cisterns, irrigation systems, and special agricultural uses such as lotus root cultivation.
• Mining and petrochemical: anti-seepage treatment of tailings ponds and chemical storage pools to prevent chemical leakage.
• Transportation construction: waterproof isolation layer for roads, railways and tunnels to protect the structure from moisture erosion.
Quality standard
The quality standards of geomemes follow a series of national and international specifications, such as GB/T 17643-2011 (Chinese National standard), GRI GM13 (International Society for Geosynthetic Materials Guide), and ASTM (American Society for Materials and Testing). These standards have strict requirements for geomembrane materials, physical properties (such as tensile strength, elongation at break, tear strength), environmental stress cracking resistance, aging resistance, and welding performance.
Ensure that the selected geomembrane products not only meet the above specifications and quality standards, but also need to be professionally designed and constructed according to the specific engineering conditions to achieve the best anti-seepage effect and long service life.