GCL Geosynthetic Clay Liner

1.What is geomembrane?

GCL Geosynthetic Clay Liner is a kind of geosynthetic material used in artificial lakes and water features, landfills, underground garages, roof gardens, pools, oil depots and chemical dumps, etc. It is made of high expansion of sodium bentonite filled in a special composite geotextile and non-woven fabric between the needle-punching method into the bentonite impermeable mat can form many small fiber space, is the bentonite particles can not flow like a direction. When water is encountered, a uniform high-density gel-like waterproof layer is formed in the mat, effectively preventing water leakage.

2.What kinds of GCL Geosynthetic Clay Liner do we have?

No.	Item		Value
No.	Item		GCL-NP	GCL-OF	GCL-AH
1	surface		Even surface,uniform thickness,no hole,damage edge,broken needle.
2	GCL unit weight(g/m2)		≥4000
3	swell index(ml/2g)		≥24	≥24	≥24
4	ethylene blue absorption(g /100g )		≥30	≥30	≥30
5	tensile strength(N/100mm)		≥600	≥700	≥600
6	elongation at max load(%)		≥10	≥10	≥8
7	peel strength(N/100mm)	non woven geotextile and woven geotextile	≥40	≥40	–
7	peel strength(N/100mm)	PE film and non woven geotextile	–	≥30	–
8	fluid loss(ml)		≤18	≤18	≤18
9	durability of bentonite(ml/2g )		≥20	≥20	≥20

Note: GCL-NP, Needle punched process GCL
GCL-OF, Needle punched and cocoon process GCL
GCL-AH, Viscose process GCL

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