Low‐energy building standards shift environmental impacts from the operational to the embodied emissions, making material efficiency (ME) important for climate mitigation. To help quantify the mitigation potential of ME strategies, we developed a model that simulates the temporal material flows and greenhouse gas embodied emissions (GEEs) of the material use in the construction and renovation activities of a neighborhood by combining life‐cycle assessment with dynamic material‐flow analysis methods. We applied our model on a “zero emission neighborhood” project, under development from 2019 to 2080 and found an average material use of 1,049 kg/m², an in‐use material stock of 43 metric tons/cap, and GEEs of 294 kgCO₂e/m². Although 52% of the total GEEs are caused by material use during initial construction, the remaining 48% are due to material replacements in a larger timeframe of 45 years. Hence, it is urgent to act now and design for ME over the whole service life of buildings. GEEs occurring far into the future will, however, have a reduced intensity because of future technology improvements, which we found to have a mitigation potential of 20%. A combination of ME strategies at different points in time will best mitigate overall GEEs. In the planning phase, encouraging thresholds on floor area per inhabitant can be set, materials with low GEEs must be chosen, and the buildings should be designed for ME and in a way that allows for re‐use of elements. Over time, good maintenance of buildings will postpone the renovation needs and extend the building lifetime. This article met the requirements for a gold‐gold JIE data openness badge described at http://jie.click/badges.

中文翻译：

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邻里建筑材料的物质流和具体温室气体排放的时间分析

低能耗建筑标准将环境影响从运营排放转移到具体排放，从而使材料效率（ME）对于缓解气候变化至关重要。为了帮助量化ME策略的缓解潜力，我们开发了一个模型，该模型通过将生命周期评估与动态材料相结合来模拟邻域的建筑和翻新活动中材料使用的时间性物质流和温室气体具体排放量（GEE）流量分析方法。我们将模型应用于“零排放社区”项目中，该项目于2019年至2080年在开发中，发现平均材料使用量为1,049 kg / m ²，在用材料库存为43公吨/盖，GEE为294 kgCO ₂ e / m ²。尽管全部GEE的52％是由最初的建造过程中的材料使用引起的，但其余的48％是由于在45年的较长时间内更换了材料而产生的。因此，迫切需要立即行动并为建筑物的整个使用寿命设计ME。然而，由于未来技术的改进，在很远的将来出现的GEE的强度会降低，我们发现它的缓解潜力为20％。在不同时间点组合ME策略将最好地缓解整体GEE。在规划阶段，可以为每个居民设置令人鼓舞的阈值，必须选择具有低GEE的材料，并且建筑物应设计用于ME，并应允许元素的重复使用。随着时间的流逝，对建筑物的良好维护将推迟翻新需求，并延长建筑物的使用寿命。