With the addition of fibres made of various materials and different geometries the ductility and the tensile strength of concrete can be increased. Based on the idea of distributing the reinforcement evenly throughout the concrete, fibre reinforced concrete was developed by adding the reinforcement directly during the mixing process. Besides all of the well known steel fibers nowadays plastic fibers and hybrid fibers (a mix of different fibers) can be used for additional applications.

The choice of fibre type and fibre geometry depends mainly on the application field. Therefore, the geometry, quality and physical properties of the fibres are matched to each application.

Many different properties of the fresh and hardened concrete can be effectively influenced by adding fibres. There are innumerable different types of fibres with different material characteristics and shapes. Correct selection for different uses is important. As well as the actual material, the shape of the fibres is also a critical factor. To improve the fire protection of concrete is only one application where micro polypropylene (PP) fibres are used successfully. Another example where micro PP fibres can be used is to improve the resistance of early age cracks in concrete where as macro and steel fibres are mainly used to improve the strength, resistance and energy absorption of the hardened concrete and to substitute at least parts of the ordinary steel reinforcement.

WHERE TO USE:

  • Industrial flooring
  • Sprayed concrete
  • Slender structures (usually in precast plants)
  • Fire resistant structures
  • Mortar applications (rehabilitation)
Fiber reinforced concrete block cut in half

FAQ

What is fibre reinforced concrete?

Fibre reinforced concrete is concrete that contains fibrous materials to increase its structural integrity. Fibres are distributed throughout the mix to control cracking, improve toughness and enhance durability.

What types of fibres does Sika offer for concrete reinforcement?

Sika offers a range of fibre types including polyolefin macro fibres, polypropylene micro fibres and bio-based fibres.

What are the benefits of using fibre reinforced concrete?

Fibre reinforcement improves crack control, enhances impact resistance, reduces shrinkage, improves fire protection and increases load-bearing capacity.

When should fibre reinforced concrete be used?

It is ideal for industrial floors, slender structures, fire resistant structures, precast concrete, sprayed concrete applications and mortar applications. Fibre reinforced concrete is especially useful where increased durability and crack resistance are critical.

Can fibre reinforced concrete replace steel mesh or rebar?

Fibre reinforced concrete can substitute traditional steel reinforcement in some cases, however it is not a complete replacement in all scenarios. Contact a member of our technical team for guidance on the best concrete reinforcement approach for your project.