If construction waste is recycled, it is important to homogenize the feed material in the first step. A primary break, which enables easier handling of the crushed material, is expedient here. This means that foreign substances can already be sorted out very effectively and contaminants from plastic, wood or steel can be removed in a targeted manner. Different mineral rocks can also be separated in order to increase the purity of the material to be further processed.

In general, the approaches to concrete recycling can also be applied to the recycling of building rubble.