In the European Union, the built environment is responsible for more than the 25% of all waste generated, highlighting the need to adopt circular practices. To indicate the level of circularity, common indicators mainly focus on: 1) the amount of virgin materials, 2) the amount of unrecoverable waste, and 3) the product lifetime. However, a holistic methodology covering the macro (material impact), meso (supply chain) and micro level (design) is still to be fully developed. In this research, two indicators - the Building Circularity Indicator (BCI) and the novel Predictive BCI (PBCI) - combine the Material Circularity Indicator with Embodied Energy (EE), Embodied CO₂ (EC) analyses and Design for Disassembly (DfD) criteria. A full and simplified version are tested for different case studies in different climate zones in the EU. EE ranges between 1.49 GJ/m² and 7.60 GJ/m², while EC between 0.15 tCO₂/m² and 0.73 tCO₂/m². In the full version, the BCI and PBCI ranges respectively from 0.23 and 0.28 to 0.04 and 0.10 with regard to mass, EE and EC. The simplified version ranges between 0.10 and 0.62, revealing to be a more accurate indicator when data are available for only a few dozen components. To enable comparisons among different buildings, results show how different interpretations of the DfD criteria affect the BCI, highlighting the need to indicate strict boundary conditions, a minimum number of evaluated components, and precise criteria on how the DfD criteria relate to either a material, a subcomponent/component, or its relationship to its context.

在欧盟，建筑环境造成的废物占所有产生废物的25％以上，这凸显了采取循环做法的必要性。为了表明圆度，常用指标主要集中在：1）未使用的材料量，2）不可回收的废物量和3）产品的使用寿命。但是，涵盖宏观（物质影响），介观（供应链）和微观（设计）的整体方法仍待充分开发。在这项研究中，两个指标-建筑圆度指标（BCI）和新颖的预测性BCI（PBCI）-将材料圆度指标与体现能源（EE）和体现CO ₂结合在一起（EC）分析和拆装设计（DfD）标准。完整版本和简化版本针对欧盟不同气候区的不同案例研究进行了测试。EE在1.49 GJ / m ²和7.60 GJ / m ²之间，而EC在0.15 tCO ₂ / m ²和0.73 tCO ₂ / m ^2之间。在完整版中，就质量，EE和EC而言，BCI和PBCI的范围分别从0.23和0.28到0.04和0.10。简化版本的范围在0.10到0.62之间，这表明当只有几十个组件可用的数据时，它是更准确的指标。为了能够在不同建筑物之间进行比较，结果显示了DfD标准的不同解释如何影响BCI，强调需要指出严格​​的边界条件，最少数量的评估组件以及DfD标准如何与任何一种材料相关的精确标准，子组件/组件或其与上下文的关系。