Antispalling Polypropylene Fibers are synthetic fibers designed for use in concrete and other cement-based materials to reduce the risk of explosive spalling when concrete is exposed to high temperatures or fire.

During heating, polypropylene fibers soften and melt, creating pathways within the concrete matrix that can facilitate the release of water vapour and reduce internal pore pressure. This mechanism can help limit explosive spalling under fire exposure.

The effectiveness of the fibers depends on factors including fiber dimensions, dosage, concrete composition, moisture content and exposure conditions.

Key Features

• Polypropylene fiber

• Designed for antispalling applications

• Distributed throughout the concrete matrix

• Can reduce the risk of explosive spalling during fire exposure

• Helps facilitate vapour-pressure release when exposed to high temperatures

• Non-corrosive

• Available in different dimensions and specifications

Typical Applications

Depending on the fiber specification, dosage and concrete design, antispalling polypropylene fibers can be used in:

• Tunnel linings

• Precast concrete elements

• High-performance concrete

• Concrete structures with fire-resistance requirements

• Underground structures

• Fire-exposed concrete applications

Product Selection

Fiber type and dosage should be selected according to the concrete composition, required fire performance and project-specific design requirements.

For fire-critical applications, performance should be verified by appropriate testing and technical documentation applicable to the specific concrete system.