Liufangzi bentonite clay liner is made of natural sodium bantonite, and the Liufangzi bentonite mine is the only real natural so
1.Liufangzi bentonite clay liner is made of natural sodium bantonite, and the Liufangzi bentonite
mine is the only real natural sodium bentonite mine.
2.Bentonite clay liners (GCLs) are an established sealing product in the geoenvironmental
industry. They are used in landfill caps and base liner applications under roads, railways,
secondary containment for above ground tank farms, as well as within various other containment
structures such as dams, canals, ponds, rivers and lakes. They are also used for waterproofing of buildings and other similar structures .Rolled out like a carpet to provide a durable impermeable liner, geosynthetic clay liners consist of a layer of high swelling sodium bentonite, sandwiched between two geotextiles. by different techniques, manufactured liufangzi GCL , is mechanically bonded by needlepunching from one nonwoven geotextile through the bentonite to the other nonwoven or woven geotextile. Natural Sodium Bentonite is a naturally occurring clay with hundreds of uses.
Comprising mainly montmorillonite, a layered clay mineral with broad flat platelets which are
ideally shaped to provide a hydraulic barrier. Sodium ions located between these platelets allow water to hydrate the bentonite in an absorption reaction that results in the bentonites swelling characteristics. swells when contacted with water approximately 900% by volume or 700% by weight. When hydrated under confinement, the bentonite swells to form a low permeability clay layer with the equivalent hydraulic protection of several feet of compacted clay.
3.This swelling allows the bentonite to seal around penetrations, giving the GCL self sealing
characteristics. During hydration, a confined layer of dry bentonite changes into a dense
monolithic mass with no observable individual particles. A fully hydrated sodium bentonite layer
can have a hydraulic conductivity of approximately one hundred times lower than a
typical compacted clay liner (CCL).Because of their low hydraulic conductivity, GCLs are used mainly as a replacement for thick, difficult to build, compacted clay liners to provide a barrier to liquids and gases.Permathene supply and install a range of GCL's from light to heavy grades. These are high performance environmental liner comprised of geosynthetic carrier components integrated with a layer of low permeability sodium bentonite. The rolls are supplied in wide widths, minimising seams. Installation is fast.
Untill now, our GCL have been used in shenyang subway\ beijing subway\ shenzhen subawy and some landfill projects and lake.
4. technical specification of GCL
Material Property | Test Method | Test Results |
Bentonite Swell Index | ASTM D-5890 | 24ml/2g min |
Bentonite Fluid Loss | ASTM D-5891 | 18ml max |
Bentonite Mass/Area2 | ASTM D-5993 | 4.5kg/m2 min |
GCL Grab Strength | ASTM D-4632 | 600 N/100mm min |
GCL Peel Strength | ASTM D-4632 | 70N/100mm |
GCL Permeability | ASTM D-5887 | 3.9*10-11 m/s |
GCL Hydrated Internal Shear Strength | ASTM D-5321 | 0.4M Pa,1h, leakage |
GCL Durability |
| 20ml/2g min |
Liufangzi bentonite mine is the only natural sodium bentonite mine in China!