Steel fiber concrete for the base plate - is that possible and what are the disadvantages?

Steel fiber reinforced concrete is a relatively new building material that was developed in the 1990s. Due to its special properties, it can have advantages in construction - but there can also be disadvantages due to the use of fiber concrete. What should be considered with regard to the bottom plate, read here.

Properties of steel fiber concrete

Steel fiber reinforced concrete is a concrete mixed with steel fibers as an additive. It is therefore a composite material.

The load bearing capacity of steel fiber concrete can be directly compared with concrete. The durability is comparable. Unlike reinforcements, where corrosion and carbonation can occur, this risk is virtually eliminated with steel fiber reinforced concrete. It only comes to light rust stains that generate only small forces in the concrete.

Advantages of steel fiber concrete for the bottom plate

With steel fiber reinforced concrete, the need for reinforcement is eliminated. Structurally, this means an advantage, since the bottom plate can be produced in one step. This saves costs and effort because the necessary reinforcement is eliminated.

Also, the risk of corrosion of the reinforcement and subsequent damage to the concrete is practically impossible with steel fiber reinforced concrete.

Disadvantages of steel fiber concrete

A general building inspectorate approval for steel fiber reinforced concrete is currently not available in Germany. Each assignment requires a single approval from the highest building supervisory authority in each state.

Steel fiber concrete is produced by adding the fibers directly to the concrete manufacturer. The manufacturer no longer guarantees the quality of the concrete, the fibers often have to be provided by the client.

Since design is necessary, only those fibers whose carrying capacity is known in conjunction with concrete may be used. The choice of such fibers is not particularly large.

Another disadvantage may also arise if, after curing of the concrete, the fibers penetrate through the concrete surface. This can lead to disadvantages:

  • Damage to cleaning or working equipment
  • Damage to tires
  • injury
  • in the case of cattle sheds or silos: contamination of animal feed

Tips & Tricks

In any case, consult the site manager or the architect in great detail before deciding on a steel fiber concrete floor slab. Advantages and possible disadvantages must always be weighed carefully in this case.

Video Board: Fiber Reinforced Concrete