From Prefabricated buildings to Material Bank

Ressource Blokken is a report funded by Realdania dedicated to addressing the pressing environmental challenge outlined in the political initiative 'One Denmark without Parallel Societies. According to this plan, more than 1.3 million m² of housing needs to be demolished by 2030.

The project investigates how the resources from the 60s and 70s residential buildings can be upcycled in future construction and represents specific proposals on how circular construction can be implemented at a large scale.

Program: From prefabricated buildings to material bank
Client: Realdania
Year: 2021
Type: Innovation project / Report
Collaborators: GXN, Teknologisk Institut, Regnestuen, SBI
Role: Initiator, planning, research, design
Status: Published
Team JAJA: Kathrin Gimmel, Jakob Christensen, Jan Tanaka, Kasper Dettinger, Stephen Dietz-Hodgson,

Destined for demolition

By 2030, more than 1.3 million m² of housing are planned to be demolished – only to subsequently construct more than 700,000 m2 of housing in the same areas.

Destined for demolition

By 2030, more than 1.3 million m² of housing are planned to be demolished – only to subsequently construct more than 700,000 m2 of housing in the same areas.

Chronology of the progress of concrete element construction in Denmark

Chronology of the progress of concrete element construction in Denmark

From block to neighbourhood

The demolition plans must be seen in the context of the transformation process. A key element in this process is neighbourhood establishment, where new and existing buildings and their residents form a close and vibrant community. Materials and building components are used locally, minimising the need for transport, saving costs and resources on transport and storage.

From block to neighbourhood

The demolition plans must be seen in the context of the transformation process. A key element in this process is neighbourhood establishment, where new and existing buildings and their residents form a close and vibrant community. Materials and building components are used locally, minimising the need for transport, saving costs and resources on transport and storage.

Screening

By reusing concrete in new construction, we have the potential to significantly reduce the CO2 impact and minimize resource consumption associated with concrete production.

Screening

By reusing concrete in new construction, we have the potential to significantly reduce the CO2 impact and minimize resource consumption associated with concrete production.

Testing Elements

The potential for reusing deconstructed concrete elements was assessed by evaluating the concrete’s technical quality and the level of reinforcement in the structures, then comparing these findings to the relevant legal requirements. The tests was made by Teknologisk Institut and SDU.

Testing Elements

The potential for reusing deconstructed concrete elements was assessed by evaluating the concrete’s technical quality and the level of reinforcement in the structures, then comparing these findings to the relevant legal requirements. The tests was made by Teknologisk Institut and SDU.

Transforming building components

Our design contribution reuses the combination of room-sized box elements and building components such as wall elements, hollow-core elements, windows, doors, and more. These elements are assembled in a staggered system built with a new wooden roof and façade elements. This combination of building elements, new and existing, together create innovative homes and the LCA calculations show large CO2 savings compared to newly built homes with similar features.

Transforming building components

Our design contribution reuses the combination of room-sized box elements and building components such as wall elements, hollow-core elements, windows, doors, and more. These elements are assembled in a staggered system built with a new wooden roof and façade elements. This combination of building elements, new and existing, together create innovative homes and the LCA calculations show large CO2 savings compared to newly built homes with similar features.

Reused interior

The large room elements shape individual rooms, with generous common areas in between. A central double-height room with skylights anchors the building, featuring a distinctive blend of concrete and timber cladding inside and out. Concrete predominates indoors, contrasting with light-coloured wood surfaces. Recycled details, like hollow-core elements on the first floor and repurposed doors leaves for the closet wall, infuse character into the interior.

Reused interior

The large room elements shape individual rooms, with generous common areas in between. A central double-height room with skylights anchors the building, featuring a distinctive blend of concrete and timber cladding inside and out. Concrete predominates indoors, contrasting with light-coloured wood surfaces. Recycled details, like hollow-core elements on the first floor and repurposed doors leaves for the closet wall, infuse character into the interior.

Public functions

Outside the buildings, the interaction between new and existing buildings is experienced. The buildings frame a central courtyard where common functions made from recycled materials are planned; waste shed, community centre, greenhouses, bicycle parking, playground and outdoor fitness made from recycled materials. Some elements such as staircase elements are directly reused as whole elements and provide a range of features such as bicycle parking, playground, exercise equipment, etc.

Public functions

Outside the buildings, the interaction between new and existing buildings is experienced. The buildings frame a central courtyard where common functions made from recycled materials are planned; waste shed, community centre, greenhouses, bicycle parking, playground and outdoor fitness made from recycled materials. Some elements such as staircase elements are directly reused as whole elements and provide a range of features such as bicycle parking, playground, exercise equipment, etc.