Bentonite Geosynthetic Clay Liner For High-Density And
Low-Permeability Waterproofing
Product Introduction
Sodium bentonite waterproof blanket (GCL) is a geosynthetic
material which uses the high expansibility and low permeability of
sodium bentonite to achieve waterproof effect.
Product Properties
1. High expansibility: sodium bentonite can absorb five times its
own weight in water, and the volume can expand to more than 15-17
times the original.
2. Low permeability: The formation of a high-density diaphragm
under water pressure, water permeability can reach 5×10^-11m/s,
with strong waterproof performance.
3. Durability: As a natural inorganic material, sodium bentonite
will not reduce performance due to aging or corrosion, and has
long-term durability.
4. Environmental protection: harmless to the human body, friendly
to the environment, is an environmentally friendly material.
5. Easy construction: no need to heat or paste, easy and fast
construction.
Product Application
1. Municipal engineering: Waterproofing of underground works such
as subways, tunnels and basements.
2. Landfill: waterproof layer used as base treatment and capping.
3. Water conservancy project: seepage prevention and reinforcement
of reservoirs, DAMS and rivers.
4. Environmental protection project: seepage prevention of sewage
treatment plants and industrial waste treatment plants.
5. Garden landscape: anti-seepage of water bodies such as
artificial lakes and roof gardens.
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 |
