Concrete milling
By mechanical action - for example with a hammer drill - concrete milling causes the deliberate destruction of structures in the course of a roadway renovation or a building demolition .
Working method
The high pressure that the chisel exerts with its tip on a road surface in road construction causes the upper layers to flake off. Depending on the depth setting and the number of chisels, smaller or larger parts will flake off. The number of chisels is very important for the resulting milling pattern . If the milling drum is equipped with a few chisels, the result is a coarse milling pattern, with many chisels a finer one ( milling grooves ).
Areas of application
The method is primarily used in traffic structures that are basically suitable due to their construction , such as bridges , underground garages , multi-storey car parks , but also industrial halls. The goals are, for example, to reduce heights, to remove damaged concrete above the reinforcement , to remove or level screeds and to adjust different heights.
Alternatives
Another type of surface processing is milling with a lamellar milling cutter, which creates a finer milling pattern. With this method, lamellas ( e.g. star lamellae ) that are loosely mounted on a pipe are guided over the surface so that the tips can just barely affect the subsurface. This also results in the surface flaking off, which, however, results in much finer results compared to milling with chisels. This process is used, for example, to remove coatings and roughen surfaces in preparation for painting work.