Applying Circularity in the Life Cycle Assessments of Buildings
Introduction
The "Applying Circularity in the Life Cycle Assessments of Buildings" report introduces a comprehensive approach to integrating circular economy principles into the construction sector's life cycle assessments (LCAs). Led by Arup and ÉTS in collaboration with Groupe AGÉCO and Studio Carbone, the project is part of the first living lab on circular economy in the construction sector initiated by the Centre d'études et de recherches intersectorielles en économie circulaire de l’ÉTS (CERIEC).
Objectives and Context
The primary objective is to develop methodologies for incorporating circular strategies into whole building life cycle assessments (WBLCA). The context acknowledges the growing need for sustainable construction practices, driven by environmental concerns and the imperative to reduce material waste.
Structure
The report is structured into two main parts:
- Overview of Circular Strategies and WBLCA: Discusses circular strategies, challenges in integrating these strategies into traditional WBLCA, and how to model circular strategies within the LCA framework.
- Detailed Account of Circular Strategies and WBLCA: Breaks down specific strategies that promote material sustainability, including the use of recycled materials, design for deconstruction, renovation of existing buildings, and strategies that increase building utilization.
Key Circular Strategies
- Strategies Sharing Materials Across Systems: Focuses on methods like the 100:0 allocation method and other allocation techniques that enhance material efficiency and reuse.
- Use of Recycled Materials and Reused Components: Emphasizes the importance of incorporating recycled materials and reusing components to reduce demand for new materials.
- Design for Deconstruction: Aims to simplify the dismantling process to facilitate the recovery and reuse of building components.
- Renovation of Existing Buildings: Advocates for strategies that extend the lifespan of existing structures rather than demolishing them.
- Design for Longevity and Spatial Intensification: Enhances the durability and spatial efficiency of buildings to promote sustainable use.
- Material Sobriety and Selection: Encourages the use of materials that minimize environmental impacts and store biogenic carbon.
- Biogenic Carbon Approaches: Discusses the sequestration of carbon from the atmosphere through plant growth and its role in material selection.
Conclusion
The report outlines a systematic approach to integrating circular economy principles into the life cycle assessment of buildings. By addressing key strategies and methodologies, it provides a roadmap for stakeholders to reduce environmental impacts, promote material efficiency, and extend the lifespan of buildings. This approach is crucial for advancing sustainable practices in the construction sector and contributing to broader environmental goals.
