Bentonite waterproof blanket is a special geosynthetic material used in artificial lake water features, landfills, underground garages, roof gardens, pools, oil depots and chemical dumps, etc. It is made of high expansion of sodium bentonite filled in a special composite geotextile and non-woven fabric between the needle-punching method into the bentonite impermeable mat can form many small fiber space, is bentonite particles can not flow like a direction. In case of water, a uniform high-density gel-like waterproof layer is formed in the mat, which effectively prevents water leakage.
Bentonite waterproof blanket according to the production process can be divided into: needle punch method sodium bentonite waterproof blanket, needle punching method sodium bentonite waterproof blanket and adhesive method sodium bentonite waterproof blanket. Needle-punching method sodium bentonite waterproof blanket, is in the needle-punching sodium bentonite waterproof blanket of non-woven geotextiles on the outer surface of the composite layer of high-density polyethylene geomembrane. Adhesive method sodium bentonite waterproof blanket, is the use of adhesive bentonite particles bonded to high-density polyethylene sheet, compression production of a sodium bentonite
Sodium bentonite in the state of water pressure to form a high-density diaphragm, the thickness of about 3mm, its permeability of & × 10ˉ11m / sec or less, equivalent to 100 times the thickness of 30cm clay denseness, has a strong self-retaining water properties.
- With permanent waterproof performance
Because sodium bentonite is a natural inorganic material, even after a long time or changes in the surrounding environment, it does not age or corrode, so the waterproof performance is long-lasting.
- Easy construction and short construction period
Compared with other waterproof materials, the construction is relatively simple and does not require heating and pasting. Only bentonite powder and nails, washers, etc. are needed for attachment and fixing. GCL is the shortest construction period among existing waterproofing materials.
- Unaffected by temperature
Will not break brittle even in cold climates.
Integration of waterproof material and object: When sodium bentonite meets water, it has 20-28 times expansion capacity. Even if concrete structures vibrate and settle, the bentonite in GCL can repair cracks on the concrete surface within 2mm.
- Green and environmental protection
Bentonite is a natural inorganic material, harmless and non-toxic to human body, has no special effect on the environment, and has good environmental performance.
High performance to price ratio, very wide use. Product amplitude up to 6 meters, greatly improving the construction efficiency.
Scope of application and application conditions: suitable for municipal (landfill), water conservancy, environmental protection, artificial lake and construction of underground waterproofing and seepage control projects.
In the traditional waterproofing materials can not be constructed under the negative temperature (-20 ℃) can still be constructed; in the wet grass-roots level (no open water) can also be constructed; in the rain and snow can not be constructed; not suitable for strong acid, strong alkaline solution impermeable; due to the bentonite system inorganic materials, so its durability is better than organic waterproofing materials.