geomembrane is made of water-proof material for water and seepage prevention. composite geo-membrane is compounded by geomembrane and pervious material. To composite pervious material on geomembrane can protect the geomembrane, increase friction coefficient and permeability in the flat. geosynthetic clay liner is made of two layers of pervious material and one layer of impervious bentonite. geosynthetic clay liner is also used for water and seepage prevention. But because the waterproof and impermeable material is clay which has little, it is not as good as geomembrane in terms of water and seepage prevention. There is a reason for the emergence of the product. Once tiny destructive hole appears, the clay will automatically fill it under pressure, that is to say, it has self-healing effect. The difference between the two: First, geomembrane has better waterproof and anti-seepage effect. Second, geosynthetic clay liner has self-healing role. Third, geosynthetic clay liner has little permeability. As for permeability: The permeability coefficient of geomembrane is less than 10 negative 11 cm3 per second. The permeability?coefficient of geosynthetic clay liner is about 10 negative 9 cm3 per second.
