What is the difference between geotextiles and geomembranes?
Geomembrane and geotextile are both used geotechnical materials .Because they are used geotechnical materials and waterproof materials, and have many similarities, they are actually two completely different materials.
1.The difference in performance and use:
The geomembrane is made of high-density polyethylene, which is used to prevent seepage, while the geotextile is made of non-woven fabric. When we use them, we usually together use. They are divided into one fabric and one membrane and two fabrics and one membrane, which have stronger reinforcement and anti-seepage performance.Geotextile is a permeable geosynthetic material made of synthetic fibers through needle punching or weaving. It is used in roads, railways, water conservancy, large buildings, power plant ash dam construction, non-ferrous metal tailings treatment, environmental protection engineering, and soil and water conservation. etc. Geomembrane is a plastic film, and geotextile is a fiber cloth geotextile, which is used in roads, railways, water conservancy, large buildings, power plant ash dam construction, non-ferrous metal tailings treatment, environmental protection engineering, soil and water conservation, etc.
Geomembrane is impermeable, and geotextile is permeable. Geotextile is a kind of good geotechnical data. The design request for the permeability coefficient of geotextile is greater than 10 times the permeability coefficient of the soil. So, the front water head must be raised. The soil particles with a smaller particle size are entrained into the geotextile. This situation develops away from the geotextile, and forms a certain thickness of an overhead layer composed of coarse soil particles. The particles in this layer are coarser and saturated. The coefficient is large, but it cannot prevent the movement of fine soil particles. When the filtering effect of the geotextile is exerted, a natural filter layer will be formed on the upstream side of the overhead layer, and the content of fine soil particles in the natural filter layer is higher than that of the overhead layer. More, the water permeability is low, which hinders the movement of the fine soil particles in the adjacent natural soil layer, so it plays a role of retaining the soil. This is how geotextiles work.