What are tips for working with rebar

Reinforcement: stability for construction projects

Reinforcing concrete contributes to the stabilization and statics of a building. With DAS HAUS you can find out what reinforcement is, where it is used and what its purpose is.

Reinforcement: stability for construction projects
Reinforcement: stability for construction projects

What does reinforcement mean?

In order to increase the stability of concrete, reinforcement - also called reinforcement - is used, which increases the load-bearing capacity and resistance of the concrete to the effects of the weather. If the reinforcement is added to the liquid concrete as a solid material, a composite material is created: reinforced concrete. The reinforcement absorbs both tensile stresses and compressive forces better, which is a great advantage for the statics of a building.

The word reinforcement comes from the field of military technology. In the past, the word was mainly used to reinforce a castle, city wall or fortification (French: armement, German: armament).

Where is the reinforcement used?

Reinforcement is used wherever special stability and resistance is required in structures: whether in bridges or in tunnel construction, in boat building or in space technology, in high-rise buildings or mechanical engineering, on facades or in the screed - the material reinforcement through reinforcement is diverse. The reinforcement can reinforce various materials, from aluminum to synthetic resin to steel.

What is the purpose of the reinforcement?

When a liquid building material such as concrete or mortar hardens, it is robust against pressure, but can tear quickly as soon as tensile stress occurs. For this reason, a solid such as structural steel is added to the liquid concrete. This can absorb tensile forces and thus ensures the greatest possible stability. The two building materials complement each other perfectly and are the solution to many building problems.

Reinforcement in house construction: reinforced concrete

Are you planning a new building? Then you will be confronted with the topic of statics in conversation with an architect or building contractor. Because regardless of whether it is the stairs, the basement or a load-bearing wall, the planners need to know exactly which forces will act on which part of the building in order to plan your home in a stable and steadfast manner. This is especially true for the balance between concrete and steel, which have to complement each other perfectly. Because even in strong winds or light earthquakes, the statics must hold. At first glance, it might seem sensible to use as much steel as possible so that even large forces can be balanced. However, steel is one of the expensive building materials, so the benefits must be seen in relation to the costs.

What is rebar?

Reinforcing steel, which has a special surface structure, is used to reinforce concrete. Due to the corrugated surface, the steel can better absorb the tensile forces and significantly relieve the concrete. In addition, the special structure of the reinforcement provides an optimal connection to the reinforced concrete composite material. Just as important as the surface of the reinforcing steel are fine cracks in the concrete, which enable the transmission of forces in the first place. However, these must not be too large, otherwise moisture could enter. This would stress the structure so much that it is even at risk of collapsing. The correct calculation by a structural engineer is all the more important. This not only takes into account the pressure on a wall from above, but also from the side and from the earth. In this way, it is calculated exactly where and how much reinforcing steel is required. The distances between the steel bars of the reinforcement are also important, because the reinforcement is only connected to the concrete in the correct ratio.

The reinforcement is used either in the form of reinforced concrete mats, rods or steel brackets in different diameters of up to 40 millimeters. These vary depending on whether they are reinforcing walls or ceilings or lintels or beams.

Just as important as the right amount of steel is the distance from the concrete to the steel. The concrete protects the steel from environmental influences and corrosion. With the help of spacers, the concrete cover can be precisely planned and adhered to.

Good to know: A base plate with reinforcement is also recommended when setting up garden houses or tool sheds, when building your own barbecue and when building a garden wall. When concreting the foundation, you can add a steel mat for reinforcement and thus ensure the best possible hold for your structure. It is also important to have gravel drainage under the foundation, which protects the floor slab against frost.

Reinforcement plaster - stability for walls and ceilings

Reinforcement is not only used in the construction of buildings. Stability is also required when plastering walls and ceilings. Reinforcement plaster is a sub-plaster in which a reinforcement fabric is used. This corresponds in its function to the reinforced concrete. The tension forces - especially the tensile forces - are passed on from the mortar to the fabric, which ensures the individual layers of plaster are particularly stable. This protects the plaster and prevents optically unsightly cracks.

Reinforcement plaster is used as a stabilizing sub-plaster, particularly in the area of ​​the thermal insulation composite system. This can be applied directly to the insulation layer, with a special glass fiber fabric usually being inserted into the plaster mortar.

Good to know: Reinforcement plaster can also be used for interior insulation. A special plus with reinforced lime plaster is that it can be painted directly with a suitable wall paint.