Pilot project circular economy

Project duration:
01.08.2023 - 31.12.2024

Funding organization:
Bavarian State Ministry for Housing, Construction and Transport

Brief summary:
To counteract man-made climate change, a drastic reduction of greenhouse gas (GHG) emissions is required. For the EU, this means a net reduction of GHG emissions by at least 55% by 2030 compared to 1990. In addition, the hitherto linear management of resources is leading to a shortage of raw materials and, at the same time, to high volumes of construction waste. The urgently needed transformation towards a climate-neutral and circular economy and society is being driven forward at European level by the European Green Deal and the New European Bauhaus. This is because the construction industry is particularly challenged, accounting for around 40% of CO2 emissions (gray energy plus operating energy), 50% of raw material consumption and 40% of waste generation. The implementation of closed material cycles is therefore urgently required in the construction sector. Although sustainable raw material management is regulated at the federal level by the Closed Substance Cycle Waste Management Act, practical implementation is not currently state of the art. The realization of low-emission buildings over the entire life cycle, which are simultaneously constructed from recycled and reused components and building materials, has so far only taken place in isolated research projects. The implementation of a pilot project for circular and sustainable construction follows the resolution of the Bavarian State Parliament of April 26, 2022 (LT-Drs. 18/22398) to implement a continuous and consistent circular economy in a state building construction measure. In this context, the use of building materials made from recycled materials and of constructions that promote the reuse and recycling of building materials without any loss of quality is to be pursued. For the evaluation of this building measure, the responsible building authority will use the evaluation system for sustainable building (BNB).

Within the framework of the research project presented here, a pilot project on building with secondary building materials or on cycle-compatible building methods in Bavaria is to be scientifically accompanied. Within the framework of a well-founded analysis process, different variants of KG 300 and KG 400 for achieving the above-mentioned goal will be examined on a life-cycle basis with regard to emissions, costs and resource consumption. Based on this, the most suitable building design is to be selected. In addition, KG 500 is to be considered qualitatively. The results will be summarized in a documentation in such a way that it can be used as an aid for further projects. 

Iryna Takser