1.GCL products introduction：
Bentonite mineralogy name is montmorillonite, natural bentonite
according to the main chemical composition is divided into Na- and
Ca- two broad categories. Bentonite with the characteristics of
expansion with water,the general expansion of the Ca-bentonite, the
expansion only about three times of its own volume; And
Na-bentonite expansion, its volume is about 15 times, absorbing 6
times its own weight water, this expansion of bentonite formed by
high-density gel with the performance of the exclusion of
water.Make use of this performance, people take this Na-bentonite
material used for waterproofing. To facilitate the construction and
transportation, will be locked the bentonite in two geosynthetics
middle layer, to protect and reinforce the GCL has a shear
strength.
2. Manufacture method：
GCL by high inflated Na-bentonite filled in a special compound
geotextile and non-woven geotextile, from the top of the non-woven
geotextile through a special needle punched method to lock the
bentonite in the lower compound geotextile made of carpet-like
fabric. Needles punched method bentonite geosynthetic clay liner
could be the formation of many small pad of fiber space, bentonite
particles can not move, at the pad with water to form a high
density of the jelly evenly waterproof layer and effective to
prevent water seepage.
3.Application：
1) Rubbish filling landfill sealing up treatment project
2) Water scene project and artifical scene project
3) Underground tanker project
4) Reservoir (pool) impervious project
5) Canal antiseepage project
6) Subway project
7) Tunnel project
8) Underground structure and underground base waterproof project
4. Waterproof characteristics:
1) Density:Na-bentonite under water pressure form high density
diaphragm, when the thickness about 3mm, its permeability
coefficient is less than x10-11 m/sec, is 100 times of 30cm of
clay, has a strong self-protection properties of water.
2) Have a permanent water-proof performance:Because Na-bentonite
base for natural inorganic materials, after a long time or a change
in the environment, aging or corrosion does not occur, therefore,
durable waterproof performance.
3) Simple operation, short construction period: Compare to other
waterproof material, the construction is relatively simple and does
not need heating and paste. Just need bentonite powder and nails
washers for connect fixed etc.
4) From the effects of temperature: In the cold weather will not be
brittle fracture.
5) Waterproof materials and the target of integration: Na-bentonite
and water reaction, with 13-16 times expansion capacity, even if
the concrete structure vibration and settlement occurred, bentonite
in GCL can repaire within 2mm concrete surface cracks.
6) Green environmental protection: Bentonite for natural inorganic
materials, non-toxic harmless to humans, does not effect to the
environment, has a good environmental performance.
5.Procution size：
Thickness＞6mm,roll width≤6mroll length is 50 m (or customers
designate)
6.GCL category and physical indicators:（According to JG/T 193-2006 standard）
Property | Specifications |
GCL-NP | GCL-OF | GCL-AH |
Mass Per Unit Area(g/m2) | ≥4,000and not less than the determined mass | ≥4,000 not less than the determined mass | ≥4,000 not less than the determined mass |
| Geosynthetic Clay Expansion index（mL/2g） | ≥24 | ≥24 | ≥24 |
Methylene Blue Absorption (g/100g) | ≥30 | ≥30 | ≥30 |
| Tensile Strength( N/100mm) | ≥600 | ≥700 | ≥600 |
| With load maximum elongation() | ≥10 | ≥10 | ≥8 |
| Peel strength (N/100mm) | Non-woven and Woven Geotextile | ≥40 | ≥40 | — |
PE geomembrane and Non-woven Geotextile | — | ≥30 | — |
Permeabili |
