A joint project on a site in Bremen shows how responsible land use can be combined with climate protection and conservation of natural resources. Located in the immediate vicinity of a commercial and industrial area, the site in the Hanseatic city is ideally suited for commercial purposes. However, its development was not possible because the property, which covers about 1 hectare, was characterized by marshy and thus unstable subsoil. New development could only take place if the brownfield site was first stabilised. This was precisely the aim of the project, which relied mainly on GRANOVA.
In order for the previously unusable area to be connected to the industrial district, in 2021 and 2022 the MAV – an associated REMEX company – delivered large contingents of GRANOVA incinerator bottom ash (IBA) to Bremen. As part of the subsoil stabilisation, the material was incorporated into the spongy soil using caterpillars and rollers. Step by step, a load-bearing ground was created.
GRANOVA is ideally suited for improving existing ground. The quality-controlled construction material offers consistent quality in terms of grain size and composition and is easy to handle and compact. Beyond its ideal suitability for soil consolidation, GRANOVA offers clear environmental benefits. Had the ground of the Bremen site been improved conventionally, this would have required the excavation of large volumes of natural aggregates. Mineral raw material sources, however, are limited and supply shortages are already imminent for some types of aggregates. In addition, the mining of minerals would have further driven landscape consumption.
To ensure sufficient stability, around 300,000 t of GRANOVA were utilised in the large-scale project in the Hanseatic city.
For the climate and environmentally friendly transport to the north, the shipment was made by water. Since the start and destination are well connected to the waterway network, the GRANOVA batches could be loaded onto cargo ships directly in Lünen and transported via shipping canals and the Weser to a port near the construction site. Transport by truck was thus only necessary for the last, short section of the journey.