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Give your construction strength - use the properties of STABILS steel fiber!

Why concrete is not always the best choice due to its brittle properties and how a mix of steel fibers and concrete is an optimal combination.

Concrete is a hard material. When subjected to tensile stresses, it shows a rather elastic behavior until the breaking point is reached.

04. April 2023
Jörg von Prondzinski
Managing Director

To prevent unpredictable behavior of the concrete, it is reinforced with the help of the traditional reinforcing steel or steel fibers. This can ensure that there is no complete loss of ultimate load in the event of a crack. The behavior of a material after cracking occurs is called post-cracking behavior. If the material is fully ductile, this means that the cracked cross-section is more resistant than the uncracked cross-section and a strengthening of the material occurs. When the material is partially ductile, the load is reduced compared to the initial crack load during post-cracking. The use of traditional fiber dosages in steel fiber reinforced concrete typically achieves partial ductility, the extent of which is determined by the performance and dosage of the steel fiber used. High dosages and high performance STABILS steel fibers allow almost full ductility.

STABILS steel fibers enable optimized componets

Why ductility and post-cracking behavior are important in steel fibers

It is of great importance that steel fibers have high ductility and good post-cracking behavior. This is the only way they can develop their full effect and contribute to effective reinforcement of concrete structures.

High ductility ensures that the steel fibers do not break even under high loads, but deform plastically and thus prevent cracking in the concrete. The good post-cracking behavior ensures that the steel fibers continue to exert their effect even after the first crack in the concrete, thus ensuring permanent reinforcement.

In a nutshell:


Without high ductility and good post-cracking behavior, steel fibers are not suitable as a reinforcing material for concrete structures.