Waterproofing Bentonite Geosynthetic Clay Liner For Subway And
Tunnel Projects
Product Introduction
Sodium bentonite waterproof blanket is a new type of environmental
protection and ecological composite impermeable material, which has
been widely used in many fields because of its unique anti-seepage
performance.
Product Properties
The main raw material for the sodium-bentonite waterproof blanket
is sodium-bentonite, a mineralogical substance called
montmorillonite, which has the property of swelling when exposed to
water. When sodium bentonite meets water, it absorbs five times its
own weight in water and expands to more than 15-17 times the
original. This property makes sodium bentonite play a key role in
waterproof blankets, which can form a uniform colloidal system with
high viscosity and low filtration.
Product Application
Sodium bentonite waterproof blanket has been widely used in various
engineering projects because of its excellent waterproof and
impermeability. It can be used for the foundation treatment and
capping of landfill sites, the seepage prevention of artificial
lakes, reservoirs, channels, rivers, roof gardens, and the seepage
prevention of underground buildings such as basements, subways,
tunnels, and underground passages. In addition, it is also suitable
for municipal engineering, subway, building underground engineering
and roof reservoir seepage prevention, as well as domestic waste
landfill, sewage treatment, industrial waste treatment, rivers and
lakes reservoir dam seepage prevention, plugging, reinforcement,
garden artificial lake golf course pond seepage prevention.
Product Specification
* Unit Weight: ≥4000g/㎡ (customized request accept)
* Width: 4m~6m
* Roll Length:
PS: Customized request accept for all above.
Product Specification and Technical Index (JG/T 193-2006)
| ITEM | GCL-NP
(Needle Puched Process GCL) | GCL-OF
(Needle Puched and Cocoon Process GCL) | GCL-AH
(Viscose Process GCL) |
| Unit Weight (g/㎡) | ≥4000
Not less than the specified value | ≥4000
Not less than the specified value | ≥4000
Not less than the specified value |
| Bentonite Swell Index (ml/2g) | ≥24 | ≥24 | ≥24 |
| Blue Clay (g/100g) | ≥30 | ≥30 | ≥30 |
| Tensile Strength (N/mm) | ≥600 | ≥700 | ≥600 |
| Elongatio At Max Load (%) | ≥10 | ≥10 | ≥8 |
Peel Strength
(N/100mm) | No-woven Geotextile&
Woven Geotextile | ≥40 | ≥40 | - |
PE Geomembrane &
No-woven Geotextile | - | ≥30 | - |
| Pesistance Hydraulic Pressure (m/s) | ≤5.0X10ˉ11 | ≤5.0X10ˉ12 | ≤1.0X10ˉ12 |
| Resistance Hydraulic Pressure | 0.4MPa,1h,No Leakage | 0.6MPa,1h,No Leakage | 0.6MPa,1h,No Leakage |
| Fluid Loss (m/L) | ≤18 | ≤18 | ≤18 |
| Durability Of Bentonite (mL/2g) | ≥20 | ≥20 | ≥20 |
