Bentonite Water Swellable Bar 25x25

About Bentonite Water Swellable Bar 25x25

A Bentonite Water Swellable Bar 25mm x 25mm is a type of waterstop used for waterproofing joints in concrete structures. This bar is made from sodium bentonite, a type of clay that expands when it comes into contact with water, effectively sealing joints and preventing water infiltration.

Key Features of Bentonite Water Swellable Bar (25mm x 25mm):

1. Material:

   • Sodium Bentonite: This is a naturally occurring clay that has the unique ability to absorb water and swell. The swelling action creates a tight, flexible seal within the joint.

2. Dimensions:

   • The bar has a 25mm x 25mm size, making it suitable for a variety of joint sizes in concrete construction. Its dimensions provide adequate coverage and ensure the bar remains in place as it expands.

3. Usage:

   • Ideal for construction joints, such as those between precast concrete slabs, foundations, retaining walls, tunnels, and underground structures like basements and water tanks.

   • Works well for areas exposed to hydrostatic pressure (areas where water is constantly or intermittently present), ensuring no water leaks through the joint.

4. How It Works:

   • When the bentonite water swellable bar comes into contact with water, it swells up to several times its original size. This swelling creates a waterproof seal, preventing water from infiltrating through the joint.

   • The bar can expand and contract slightly, which allows it to accommodate some movement within the joint while maintaining the waterproof seal.

5. Advantages:

   • Durable: Bentonite is known for its long-lasting performance in waterstop applications.

   • Easy to Install: It can be installed in the joint area before or during the pouring of concrete, either by embedding it directly into the formwork or attaching it using adhesives.

   • Cost-Effective: Bentonite-based waterstops are generally more affordable compared to other types of waterproofing methods (e.g., rubber or PVC waterstops).

   • Environmentally Friendly: As a natural clay material, bentonite is non-toxic and environmentally friendly.

   • Effective in Low & High Water Pressure Areas: It is suitable for both low and high hydrostatic pressure areas.

6. Applications:

   • Concrete water tanks

   • Tunnels

   • Underground structures (e.g., basements, parking garages)

   • Foundations and retaining walls

   • Precast concrete joints

7. Installation Tips:

   • Install before or during the concrete pouring process, ensuring the bentonite bar is securely embedded into the formwork.

   • Ensure that the bar is positioned along the joint line and is adequately supported to prevent displacement before the concrete is set.

   • Typically, the bar should be installed in dry conditions to ensure it does not swell prematurely.

Benefits:

• Prevents Water Infiltration: The bentonite bar creates a reliable seal against water, ensuring the integrity of the structure.

• Long-Term Performance: Bentonite swells as needed over time, ensuring that the seal remains intact even after extended exposure to water.

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