Sustainable building: ZIM network develops new recycling technologies for building materials

Construction waste
Together with 24 partners from medium-sized businesses, industry, research, and teaching, TU Bergakademie Freiberg has founded the new ZIM cooperation network "RecyBau" under the direction of RAS AG. The vision of the association is the development of circular, sustainable building materials.

The need for building materials is great and as the construction industry grows, so does the proportion of waste. In Germany alone, up to 59.8 million tons of building rubble are generated annually (source: circular economy construction, 12th monitoring report). So far, there has only been "real" recycling for a small Blick ins Innere eines ausgesonderten Baustoffesproportion of that. Since January 2020, the Recycling Management Act (KrWG) has provided for a recycling rate of at least 70  percent for construction and demolition waste, also due to the continued shortage of landfill capacities. The aim must be to increase the previous quotas and, above all, to develop resource-saving recycling processes that make recycled materials available to the regional building materials industry without any loss of quality. The partners want to create the basis for this as part of the “RecyBau” project funded by the Central Innovation Program for SMEs (ZIM).

Up-cycling and resource-saving production of mineral building materials

With new economic and ecological approaches, on the one hand, the reprocessing of mineral building rubble should be optimized and on the other hand, innovative manufacturing processes for recycled building materials should be developed. Aufgespaltener BaustoffrestProduction and reprocessing should be based primarily on regional, sustainable and climate-friendly material cycles. To this end, the Institute of Processing Machines and Recycling Systems Technology (IART) at the TU Bergakademie Freiberg is working on innovations in the areas of sorting processes, the production of building materials and the ability to dismantle according to type. These include, for example, ideas for selective shredding through electrodynamic fragmentation, in which high-voltage pulses of up to 600 kilovolts are used to break down material compounds in a continuous process, and methods for the targeted detection and removal of pollutants from the material cycle. The IART can fall back on a wide range of technical equipment with almost all common types of shredding, classifying, pelletizing and briquetting machines in different sizes up to the pilot plant.

Collaboration across the value chain

The 25 network partners of "RecyBau" are located along the entire value chain in the construction sector and thus bundle diverse competencies about the necessary technological innovations for the future realization of sustainable buildings made from resource-saving recycled building materials. The cooperation network was founded by RAS AG and is funded by the Federal Ministry for Economic Affairs and Energy as part of the Central Innovation Program for SMEs (ZIM).

Further information on the network „RecyBau“

Fragen zu diesem Thema beantwortet: 
Prof.Dr. Holger Lieberwirth, Phone: 03731/39-2558 & Dr. Fabian Glaab (RAS AG), Phone: 0941/60717-311