GCL Waterproof Blanket

GCL waterproof blanket 3500-6000 g/m2 bentonite geosynthetic clay liner, 6 m roll width, for landfill, pond, tunnel and basement waterproofing.

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SKU: GEO-4777C6 Category: Geosynthetics

Geosynthetics

Product Overview

The GCL waterproof blanket from Bingo Pipeline is a geosynthetic clay liner made of natural sodium bentonite sandwiched between woven and nonwoven geotextiles. When wetted, the bentonite swells to form a low-permeability barrier, giving the GCL waterproof blanket self-sealing performance against water seepage.

Standard rolls are 6 m wide and range from 3500 g/m² to 6000 g/m² for non-standard grades and 4000 g/m² to 6000 g/m² for national standard grades, with an ASTM polypropylene type at 4500 and 4800 g/m². A 0.2 mm or 0.3 mm laminated film can be added where a higher barrier is required.

Quick Information

Material: sodium bentonite between woven and nonwoven geotextile
Mass per unit area: 3500 - 6000 g/m²
Grades: national standard / non-standard / ASTM PP type
Roll width: 6 m standard
Lamination: 0.2 mm or 0.3 mm film
Function: self-sealing low-permeability barrier

Specification Table

Grade	Mass per unit area	Type
National standard	4000 / 4500 / 4800 / 5000 / 5500 / 6000 g/m²	Bentonite GCL, polyester geotextile
Non-standard	3500 / 4000 / 4200 / 4500 / 4800 / 5000 / 5500 / 6000 g/m²	Bentonite GCL
ASTM PP type	4500 / 4800 g/m²	Polypropylene geotextile
Roll width	6 m standard, special width on request
Lamination	0.2 mm film, 0.3 mm film available

Key Features

Self-sealing: the bentonite core of the GCL waterproof blanket swells on contact with water and seals small punctures.
Very low permeability: the hydrated bentonite layer of the GCL waterproof blanket forms an effective barrier against water and leachate.
Fast installation: the GCL waterproof blanket is laid in 6 m rolls and overlapped, needing no welding or adhesive.
Handles movement: the flexible GCL waterproof blanket accommodates settlement and thermal movement without cracking.
Multiple grades: 3500-6000 g/m² and ASTM PP types let the GCL waterproof blanket fit different design requirements.
Cost effective: the GCL waterproof blanket replaces thick compacted clay layers and reduces earthworks.

Production

Raw Material

The GCL waterproof blanket uses natural sodium bentonite with high swelling capacity, needle-punched through a woven and a nonwoven geotextile. Bentonite purity and mass per unit area are checked before needling.

Production Process

Bentonite is spread evenly between the geotextile layers, then needle punching carries fibres through the bentonite to bond the GCL waterproof blanket into one sheet. Lamination film is added where specified.

Quality Control

Each lot of GCL waterproof blanket is tested for mass per unit area, bentonite content, swell index, tensile strength and permeability. Rolls are labelled with grade and weight for site verification.

Applications

Landfill and waste containment: the GCL waterproof blanket forms a secondary barrier under waste cells.
Pond and reservoir lining: the GCL waterproof blanket seals decorative lakes, fish ponds and storage reservoirs.
Tunnel and underground works: the GCL waterproof blanket waterproofs tunnel linings and underground structures.
Basement and roof waterproofing: the GCL waterproof blanket protects building substructures against groundwater.
Canal and dam remediation: the GCL waterproof blanket repairs leaking canals, dams and embankments.