International Industrial Ecology Day 2021

In order to develop circular concepts in the built environment, information is needed on anthropogenic material in the building stock, on its dynamics, on the potentials of recycling and the resulting effects on resource conservation and climate impact. The proposed contribution presents a method for the creation of regional material cadastres, which can be used to provide the corresponding information and can be used within the framework of transdisciplinary approaches to foster circular economy in built environment. The method uses building stock inventory modelling methods and links this with a continuous material flow analysis approach, which is operationalised at the level of material composition indicators. The material life cycle is traced - from the resource, to the building material, to the construction waste and via the process chains to the grey emissions. Application examples are presented using the example of a city in Germany: The closing of local concrete cycles and the reduction of grey emissions in municipal building stock.