ASTM Standard Geosynthetic Clay Liners for Landfill

Color: Black
Application: Landfill Construction
Function: Waterproofing
Classification: Gcl
Material: PET
Type: Gcl

Product Description

Product Description
Geosynthetic clay liners (GCLs) are high performance needle punched environmental reinforced composites which combine two durable geotextile outer layers with a uniform core of natural sodium bentonite clay to form a hydraulic barrier. Fibers from the non-woven geotextile are needle punched through the layer of bentonite and incorporated into the other geotextile (either a woven or non-woven).when hydrated under a confining load, the bentonite swells to form a low permeability clay layer with the equivalent hydraulic protection of several feet of compacted clay.

Technical Parameter

Inspection Item Testing Procedure Technical Index
Bentonite mass for unit area ASTMD5993 ≥5.5kg/m2
Expansion coefficient ASTMD5890 ≥25mL/2g
Low temperature ductility ASTMD5898 No impact at -35°C
Thickness ASTMD5892 ≥6.4mm
Tensile strength ASTMD4632 ≥540N
Peel strength of concrete face ASTMD4632 ≥3.0 KN/ m2
Peel strength ASTMD4632 ≥68N
Indicated flow ASTMD5887 ≤1 × 10-8m3/m2/sec
Hydrostatic pressure resistance ASTMD5888 ≥70
Permeability ASTMD5887 ≤5 × 10-12cm/sec
Extension rate ASTMD5896 ≥20
Puncture strength ASTMD5894 ≥635N

1. Improved leakage performance
2. Permanent waterproof performance
3. Simple construction and short time limit for a project.
4. Not influenced by air temperature.
5. A kind of green material and good to environmental protection.
6. More versatile than compacted clay
7. Increased airspace and liner efficiency


·Landfills ·Mud Pits
·Lagoons ·Canals
·Bund Lining ·Tank Lining
·Fish Farm Lining ·Roof Lining
·Waste Water Pits ·Ponds and Reservoirs
·Dams ·Floating Covers
·Vertical Cutoff Walls ·Hydraulic Structure
·Basement Lining ·Drip Irrigation Ponds


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