Roadmap for Decarbonization of the Building and Construction Industry—A Supply Chain Analysis Including Primary Production of Steel and Cement

Energies

Johan Rootzén¹  Filip Johnsson²  Mikael Odenberger²  Alla Toktarova²  Ida Karlsson²  Lisa Göransson² 

[1] Department of Economics, University of Gothenburg, SE-405 30 Gothenburg, Sweden;Department of Space, Earth and Environment, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden;

关键词: construction;    building;    supply chain;    decarbonization;    roadmap;    heavy industry;   

DOI  :  10.3390/en13164136

来源: DOAJ

【 摘 要 】

Sweden has committed to reducing greenhouse gas (GHG) emissions to net-zero by 2045. Around 20% of Sweden’s annual CO₂ emissions arise from manufacturing, transporting, and processing of construction materials for construction and refurbishment of buildings and infrastructure. In this study, material and energy flows for building and transport infrastructure construction is outlined, together with a roadmap detailing how the flows change depending on different technical and strategical choices. By matching short-term and long-term goals with specific technology solutions, these pathways make it possible to identify key decision points and potential synergies, competing goals, and lock-in effects. The results show that it is possible to reduce CO₂ emissions associated with construction of buildings and transport infrastructure by 50% to 2030 applying already available measures, and reach close to zero emissions by 2045, while indicating that strategic choices with respect to process technologies and energy carriers may have different implications on energy use and CO₂ emissions over time. The results also illustrate the importance of intensifying efforts to identify and manage both soft and hard barriers and the importance of simultaneously acting now by implementing available measures (e.g., material efficiency and material/fuel substitution measures), while actively planning for long-term measures (low-CO₂ steel or cement).

【 授权许可】

Unknown