Geosythetic Clay Liner For Landfill

Excellent Waterproof Performance: The sodium-based bentonite in the GCL swells when it comes into contact with water, forming a dense gelatinous waterproof layer with extremely low water permeability, which can effectively prevent water seepage and achieve excellent waterproofing effects.
Good Self-healing Ability: It has an expansion capacity of 20 to 28 times. For minor cracks, holes and other defects in the base layer, it can fill and repair them through its own expansion, ensuring the integrity of the waterproofing system.
Convenient Construction: The construction process is simple. There is no need for special equipment or professional technicians. It can be directly laid, reducing the construction steps and time and improving the construction efficiency.
Strong Adaptability: It can adapt to different construction environments and base layer conditions. Whether on a wet base layer or in cold weather (it can still be constructed at -20°C), it can maintain good performance.
Environmentally Friendly and Non-toxic: Taking natural sodium-based bentonite as the main raw material, it contains no harmful substances, is harmless to the human body and the environment, and meets environmental protection requirements.
High Cost-effectiveness: The product has a long service life, which can reach more than 50 years. Considering its waterproofing effect and service life comprehensively, compared with other waterproofing materials, it has a high cost-performance ratio.
Compatibility with Various Materials: It can combine well with a variety of materials such as concrete, masonry, and geotextiles to jointly form a reliable waterproof structure.
Certain Puncture Resistance: Due to its structural characteristics and material properties, it has a certain degree of puncture resistance and can withstand the damage to the waterproof layer caused by external factors.

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Product Details

The Geosynthetic Clay Liner (GCL), composed of sodium-based bentonite, is an innovative geosynthetic material designed for waterproofing applications. Below is a detailed overview of its features and benefits:

Material Composition

Sodium-based Bentonite: This key component of the waterproof liner possesses the unique ability to swell upon contact with water, forming a dense, impermeable barrier. The sodium-based bentonite particles are carefully selected and refined to ensure high purity, excellent swelling capacity, and superior colloidal properties.
Geotextile: Commonly composed of synthetic fibers such as polypropylene or polyester, geotextiles exhibit strong tensile strength, tear resistance, and water permeability. Positioned on both the top and bottom surfaces of the waterproof blanket, they serve to encapsulate and secure the bentonite particles, preventing their loss while reinforcing the overall structural integrity and stability of the waterproof system.
Plastic Woven Fabric (Optional): In certain sodium-based bentonite waterproof blankets, a layer of plastic woven fabric is incorporated in the middle to enhance strength and puncture resistance. This added layer improves the blanket’s durability, particularly during construction and long-term use.

Working Principle

When sodium-based bentonite comes into contact with water, it swells to form a dense, low-permeability gel-like layer. This gel effectively fills voids and cracks in the substrate, blocking water infiltration and providing a reliable waterproofing function. Confined between two layers of geotextile, the bentonite expands in a more uniform and controlled manner, resulting in a denser and more stable waterproof barrier. Even in the event of minor shifts or cracks in the underlying surface, the bentonite's self-sealing properties enable it to expand and fill the gaps, maintaining long-term waterproof performance.

Product Features

Outstanding Waterproof Performance:
Geosynthetic Clay Liners (GCLs) made with sodium-based bentonite exhibit an exceptionally low permeability coefficient, typically less than $10^{-11}$ 10−11 m/s. This ensures highly effective water seepage prevention and delivers superior waterproofing performance.

Excellent Self-Healing Properties:
Thanks to the expansive nature of bentonite, the GCL possesses strong self-repair capabilities. It can automatically seal minor cracks, holes, and imperfections in the substrate, maintaining the integrity of the waterproofing system.

Easy and Efficient Installation:
The construction process is straightforward and does not require specialized equipment or complex techniques. The liner can be laid directly onto the base surface and secured with minimal effort, enabling rapid installation and significantly reducing labor and time costs.

High Adaptability:
GCLs are suitable for a wide range of construction environments and substrate conditions. They perform reliably on damp surfaces and in cold climates, maintaining consistent waterproofing effectiveness under various site conditions.

Eco-Friendly and Non-Toxic:
Made primarily from natural sodium-based bentonite, the GCL contains no harmful substances. It is safe for both human health and the environment, fully compliant with environmental protection standards, and ideal for use in environmentally sensitive engineering projects.