bentonite mat 4000g/m2-6000g/m2

Geosynthetic Clay Liner (GCL) is a kind of gree material and good to environmential protection anti-leakage product.

                     GCL

   GCL's are composites that combine geotextile outer layers with a core of low-permeability sodium bentonite clay. Bentonite is a natural sealant, which actuates (hydrates) on contact with water. GCL's are used as a replacement for compacted clay liners. Upon hydration, the bentonite in the  Geosynthetic Clay Liner swells to form a low permeability clay liner with a hydraulic conductiivity of less than 5 x 10-9 cm/sec. As a result,  GCL can provide approximately the same hydraulic protection as one metre of compacted clay.

Technical parameter of GCL

Test Item		GCL-NP	GCL-OF	GCL-AH
Unit Weight  ( g/m2 )		≥ 4000	≥ 4000	≥ 4000
Swell Index  (ml/2g min)		≥24	≥24	≥24
Methylene blue adsorption (g/100g)		≥30	≥30	≥30
Grab Tensile Strength  (N/100mm)		≥600	≥700	≥600
Elongation@peak load  (100%)		≥10	≥10	≥8
Peel Strength (N/100mm)	Nowoven Geotextile & Woven Geotextile	≥40	≥40	-----
	PE membrane & Nowoven Geotextile	------	≥30	------
Permeability (m/s)		≤5.0×10-11	≤5.0×10-12	≤5.0×10-12
Hydrostatic Pressure		0.4 Mpa,1h No  seepage	0.6 Mpa,1h No  seepage	0.6 Mpa,1h No  seepage
Fluid Loss  (ml)		≤18	≤18	≤18
Bentonite Durability (ml/2g)		≥20	≥20	≥20

bentonite mat 4000g/m2-6000g/m2