Processing of construction waste causes a large portion of fine particles. According to the present state of the art the mineral components can be sorted only very hard or not at all, while metals can be almost completely separated. In a present research project the possibilities of an utilization of the heterogeneous mineral portion of the construction waste are examined. The chemical composition of the processed material combined with the addition of small quantities of additives makes it possible to create a mixture which is useable for successful thermal or hydrothermal hardening. The produced granules can be used as lightweight aggregates for concrete or as bulk material for insulation and planting. To keep the costs low, no additional bonding agents are to be used for agglomeration and all used additives should be waste substances more ideally. The short contribution supplies an overview of the first results from the current project.