Material: The bars are typically made from a hydrophilic (water-absorbing) material, often a synthetic rubber or polymer compound. These materials have the ability to absorb water and expand, creating a seal.
Design: The bars are often manufactured in various shapes and sizes, with some designed specifically for use in joints, construction joints, or expansion joints in concrete structures.
Installation: Hydrafilic water swellable bars are installed in the joints or areas where water ingress is a concern. During installation, care must be taken to ensure proper positioning and contact with the surrounding concrete.
Activation: The bars become activated when they come into contact with water. Once activated, they absorb the water and swell, forming a tight seal to prevent further water penetration.
Expansion Ratio: The ability of the bar to expand upon contact with water is a critical factor. This expansion ratio should be sufficient to create an effective seal and withstand the expected water pressure.
Adhesion to Concrete: The material should have good adhesion properties to bond with the concrete surfaces, ensuring a durable and long-lasting seal.
Compatibility: Hydrafilic water swellable bars should be compatible with the concrete and other materials used in the construction to avoid any chemical reactions that could compromise the effectiveness of the waterstop.
Long-Term Performance: These bars are designed for long-term performance and should be resistant to degradation over time, ensuring ongoing protection against water infiltration.