In times of increasingly scarce raw materials, it is increasingly important to reuse the available construction waste with maximum quality in order to obtain high-quality RCL material at the end of the process chain. When crushing rubble waste usually high fines and high levels of crushed sands are produced, which can prevent the reuse of this recycled material. Monitoring the grading curve is therefore essential to ensure consistent quality. In particular, the proportions of the smaller grain fractions should be smaller, so that the legally prescribed limits for frost layers and gravel base layers are not exceeded by the handling and compression of the RCL gravel. Only then can the requirements for water permeability and frost resistance be guaranteed even after complete use of it.
Not to be neglected are the compaction properties, which are more advantageous if the grain composition contains more coarse grain fractions. In addition to the improved load-bearing capacity, this also improves the paving quality and shortens the paving time.