GCL is a kind of geosynthetics which widely used for artificial lake water, landfill, underground garage, the roof garden, pool, oil and chemical storage area such as seepage prevention,it is made of high dilatability of sodium base bentonite filling between the special composite geotextile and non-woven fabric, with acupuncture law into bentonite seepage control pad can form many small fiber space.Bentonite particles can not flow like a direction, when water in the pad to form a uniform high density of rubber waterproof layer, effectively prevent water leakage. Bentonite waterproof blanket according to the production process can be divided into: needle-punched sodium bentonite waterproof blanket, needle-punched film coated sodium bentonite waterproof blanket and adhesive method sodium bentonite waterproof blanket. The method of needle-punched sodium bentonite waterproof blanket is to compound a layer of high density polyethylene geomembrane on the outer surface of the nonwoven geotextile of needle-punched sodium bentonite waterproof blanket.
There are some construction guidance of GCL:

1,bentonite waterproof blanket construction should check the base, the base should be smooth, no pothole water, no stone roots and other sharp objects.

2,bentonite waterproof blanket in the process of handling and construction should try to avoid vibration and impact, the best one in place.

3, After GCL installation and acceptance, the installation of HDPE geomeme should be carried out as soon as possible to prevent being wet or broken and dirty.