ABSTRACT
Abstract This paper reports about the development of natural aggregate resources and substitute potentials in Germany. It shows which formal prior conditions are necessary to recycle building rubble as concrete aggregate. Steps against the varying properties of the processed rubble as particle density and water absorption are discussed from a practical point of view. It is reported about the first attempts on performing large scale tests concerning the reuse of concrete and masonry as concrete aggregate in Germany. Keywords: Concrete Aggregates, Priorities for Reuse, Guidelines, Standards, Properties of Aggregates, Bulk Density, Water Absorption, Pilot Projects,
1 Introduction
Recycling of structural material in Germany is still far from getting a real closedloop-recycling-system. Though building rubble is increasingly recycled more than discarded as sanitary landfill, valuable demolition rubble is still reused for secondary purposes as subbase for roads and noise protection walls. If a closed-loop system is to be achieved, this material has to serve its original purpose. The commonly used procedure can be compared with a declining spiral. That is why the recycled material is decreasing in usefulness and value.
