HeidelbergCement is supporting the pilot project Circular City – Building Material Registry for the City of Heidelbergas a partner. Through the project, in which Drees & Sommer SE and the materials platform Madaster are involved alongside HeidelbergCement, Heidelberg is the first city in Europe to apply the principle of urban mining, in which construction and demolition waste are to be reused in new construction projects in the sense of circular economy. Conception lies with the environmental consultancy EPEA, a subsidiary of Drees & Sommer.
“Full circular economy and sustainable construction are central elements of our climate strategy,” says Dr Dominik von Achten, chairman of the managing board of HeidelbergCement: “We want to continue to significantly reduce our carbon footprint in the coming years. In doing so, we are focusing on the life cycle assessment of our product concrete, including the processing of demolished concrete and returning it to the construction cycle. By 2030, we want to offer circular alternatives for half of our concrete products. Together with the city of Heidelberg, also a pioneer in the area of climate protection, we want to use the Circular City project to demonstrate the enormous potential of concrete recycling for future urban construction.”
The goal is the complete economic and ecological analysis of the city’s building inventory, which will be compiled in a digital material registry. The basis for the registry is the Urban Mining Screener developed by EPEA. This programme can estimate the composition of buildings at the push of a button, based on building data such as location, year of construction, building volume or building type. Based on this information, landfills and processing areas can, for example, be planned accordingly, and local value creation can be triggered through local supply chains and new business models.
In the future, demolished concrete is no longer to be disposed of in landfills or roadbeds but rather crushed and separated into its components using innovative processes and returned to the construction cycle. As part of the ReConcrete 360° project, HeidelbergCement is currently also working on a process to incorporate CO2 into recycled concrete, thereby reducing CO2 emissions in cement production.
