Pilot project with 100% recycled aggregate and cement replacement with RC powder

As part of an ongoing research project at Munich University of Applied Sciences, new resource-efficient structural concretes made entirely from recycled aggregates are being developed and tested for practical application. The aim is to upgrade mineral demolition materials into high-value construction products while designing concretes that are both environmentally and technically robust. For a demonstration structure, concretes were produced in which all aggregates—recycled sand, recycled concrete particles, and recycled brick fragments—were sourced from secondary materials. The binder system combined a Portland composite cement with finely ground brick dust from industrial brick grinding, used as a pozzolanic additive to support performance and contribute to circular material use. This approach enables regional resource cycles, reduces the demand for natural raw materials, and maintains the required mechanical and durability properties of structural concrete. Based on these materials, several concrete mixtures were developed and used to produce typical building elements such as walls, beams, and slabs. The results show that concretes made with fully recycled aggregates and brick dust can be manufactured and placed reliably and are fundamentally suitable for load-bearing applications. The project therefore links scientific research with real-world construction practice and demonstrates how modern, sustainable concretes can be implemented on an actual building site.