Climate mitigation and efficient use of resources in the building sector have become a central issue for sustainable development. Promoting a circular economy and reducing global warming at the same time is an increasingly important challenge for construction, demolition and recycling of buildings. This study assesses the greenhouse gas emissions in relation to the resource use of recycled concrete (RC-concrete) and transfers the results into a Building Information Modelling application for visualization of the footprints results. The town hall building in the German city of Korbach was selected as a case study, which was selectively demolished and rebuilt with RC-concrete using recycled aggregates from the old building. The production of RC-concrete is compared with conventional concrete made from natural aggregates. The analysis covers the end of life and the production phase of concrete within the life cycle assessment (LCA) boundaries. The environmental assessment is done based on product climate, energy, material and water footprints, as reliable benchmarks for climate and resource efficiency in the building sector. RC-concrete can decrease the material footprint by up to 50%, whereas the reduction potential for the climate footprint is limited and the water footprint can be up to ten times higher with wet processing of concrete waste. The visualization of footprint results using LCA and digital planning software will further enhance the low carbon architectural design and circularity in the building sector.

建筑部门减缓气候变化和有效利用资源已成为可持续发展的核心问题。在促进循环经济和减缓全球变暖的同时，建筑、拆除和回收利用是一项日益重要的挑战。本研究评估与再生混凝土 (RC-concrete) 资源使用相关的温室气体排放，并将结果传输到建筑信息模型应用程序中，以实现足迹结果的可视化。德国城市科尔巴赫的市政厅建筑被选为案例研究，它被选择性地拆除，并使用旧建筑的再生骨料用钢筋混凝土混凝土重建。RC 混凝土的生产与由天然骨料制成的常规混凝土进行了比较。该分析涵盖了生命周期评估 (LCA) 边界内混凝土的使用寿命结束和生产阶段。环境评估是根据产品气候、能源、材料和水足迹进行的，作为建筑部门气候和资源效率的可靠基准。RC 混凝土可以减少高达 50% 的材料足迹，而减少气候足迹的潜力是有限的，并且通过湿法处理混凝土废物，水足迹可以高出十倍。使用 LCA 和数字规划软件将足迹结果可视化将进一步增强建筑领域的低碳建筑设计和循环性。环境评估是根据产品气候、能源、材料和水足迹进行的，作为建筑部门气候和资源效率的可靠基准。RC 混凝土可以减少高达 50% 的材料足迹，而减少气候足迹的潜力是有限的，并且通过湿法处理混凝土废物，水足迹可以高出十倍。使用 LCA 和数字规划软件将足迹结果可视化将进一步增强建筑领域的低碳建筑设计和循环性。环境评估是根据产品气候、能源、材料和水足迹进行的，作为建筑部门气候和资源效率的可靠基准。RC 混凝土可以减少高达 50% 的材料足迹，而减少气候足迹的潜力是有限的，并且通过湿法处理混凝土废物，水足迹可以高出十倍。使用 LCA 和数字规划软件将足迹结果可视化将进一步增强建筑领域的低碳建筑设计和循环性。而减少气候足迹的潜力是有限的，通过湿法处理混凝土废物，水足迹可能会高出十倍。使用 LCA 和数字规划软件将足迹结果可视化，将进一步增强建筑领域的低碳建筑设计和循环性。而减少气候足迹的潜力是有限的，通过湿法处理混凝土废物，水足迹可能会高出十倍。使用 LCA 和数字规划软件将足迹结果可视化将进一步增强建筑领域的低碳建筑设计和循环性。