Geomembranes are divided into LLDPE (Linear Low Density Polyethylene), LDPE (Low Density Geomembrane) and HDPE (High Density Polyethylene Membrane) according to their density.
Geotechnical membranes with specifications ranging from 0.2mm to 1.0mm are commonly called impermeable membranes, or waterproof or plastic membranes. But more than 1.0 mm is customarily called waterproof board.
At the same time, geomembrane is divided into smooth geomembrane and rough geomembrane. There are obvious differences between them and their uses are different.
Geomembranes are generally classified by thickness. The following is its model:
Thickness：0.1mm 0.2mm 0.25mm 0.5mm 0.75mm 1.0mm 1.5mm 2.0mm 2.5mm 3.0mm
Smooth geomembrane, i. e. ordinary geomembrane, has good impermeability coefficient. It is widely used in agriculture, aquaculture, environmental protection engineering, road engineering and so on.
Coarse geomembrane requires a minimum thickness of more than 1.0 mm, not less than 1.0 mm. Generally, its specification is to calculate the weight of the film first, and then add a rough surface of 80 grams. If it's two rough surfaces, add 160 grams.
The specification of rough geomembrane is generally from 1.0 mm thick to 3.0 mm thick. Because of its large friction coefficient, it has been widely used in seepage control projects with large vertical depth.
Because of its large friction coefficient and good impervious performance, it has been widely used in various anti-seepage works such as landfill, tailings reservoir, regulating treatment pond, dyke water conservancy, evaporation pond, waste landfill site, biogas digester and so on.