Buildings and the construction sector are responsible for a considerable share of human environmental impacts, and have high economic and social costs. This project aims to contribute to advancing towards circular economy-based construction techniques, to improve the sector's sustainability performance. Specifically, the project developed a tool to assess the sustainability of waste-based shading devices for public school building stock. The tool combines a multi-criteria decision-making method with the Delphi interview technique to reduce possible biases to a minimum. It is a flexible instrument for holistic sustainability assessment of initial designs. The tool was validated by assessing six initial designs created in three cross-disciplinary university courses. The resulting high economic satisfaction indexes – up to 0.93 on a 0 to 1 scale – and low sustainability indexes – from 0.39 to 0.53 – confirm that four alternatives are economically feasible. However, the environmental and social parameters could be improved. In this first application of the tool, the comparison of recycled and reused construction materials versus new building materials allowed informed trade-offs to be made between the associated embodied and operational carbon, to compare the long-term operational energy and carbon savings of the higher-performing solution with new materials versus the upfront lower embodied carbon of sourcing and applying reused and recycled materials for similar alternatives. Findings on the contribution of reusing materials, with reductions in environmental impacts up to 45%, prove that this project is contributing to defining more sustainable facades.

中文翻译：

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用于陈旧教育公共建筑翻新的建筑垃圾遮阳装置的综合可持续性评估

建筑物和建筑业对人类环境影响相当大，并且具有高昂的经济和社会成本。该项目旨在推动基于循环经济的建筑技术的发展，提高该行业的可持续发展绩效。具体来说，该项目开发了一种工具来评估公立学校建筑群中基于废物的遮阳设备的可持续性。该工具将多标准决策方法与德尔菲访谈技术相结合，将可能的偏差减少到最低限度。它是对初始设计进行整体可持续性评估的灵活工具。该工具通过评估三门跨学科大学课程中创建的六种初始设计进行了验证。由此产生的高经济满意度指数（在 0 到 1 的范围内高达 0.93）和低可持续性指数（从 0.39 到 0.53）证实了四种替代方案在经济上是可行的。然而，环境和社会参数还有待改善。在该工具的首次应用中，将回收和再利用的建筑材料与新型建筑材料进行比较，可以在相关的隐含碳和运营碳之间进行明智的权衡，以比较较高水平的长期运营能源和碳节约。 - 使用新材料执行解决方案，而不是预先采购和应用重复使用和回收材料作为类似替代品的较低隐含碳。关于重复利用材料的贡献的调查结果，将环境影响减少高达 45%，证明该项目有助于定义更可持续的外墙。