Subsequent rebar connection aka rebar
In our densely populated world in particular, it may be necessary to expand buildings. For this you can of course use attachments made of wood or steel and attach them to the existing structure with heavy-duty dowels. However, it is often desired that the new part of the building be seamlessly integrated into the existing one. For this purpose, there is the possibility of expanding reinforced concrete components such as ceilings, columns or walls with the help of subsequent reinforcement connections. For this purpose , reinforcing steel is anchored in the existing concrete structure using an injection mortar system.
This injection mortar system requires an approval/assessment ( ETA ) for subsequent reinforcement connections (rebar for short). The ETA regulates which diameters, anchorage depths and loads are permissible. After the rebars have been installed in the existing concrete structure, the new structure can be concreted on site. The two components are then connected to each other, almost as if they had been cast in one piece. The structure can thus be expanded in the same architectural style. In addition, aspects such as load transfer, fire protection or physical building conditions can be easily met.
When choosing the product, you can choose between fast or slow-hardening composite mortars. There is no right or wrong here. Boundary conditions such as temperature, drill hole diameter, drilling method or setting depth decide whether a system with a short or long processing or curing time makes more sense.
In general:
The installation of subsequent rebar connections may only be carried out by trained specialist personnel.
