Increasing environmental concerns and resource scarcity risks have drawn attention to a Circular Economic (CE) model during the last decade. Nevertheless, literature related to the state of practice of CE in the built environment in the United States (U.S.) is still limited. In this context, this study investigates U.S. architectural, engineering, and construction (AEC) industry stakeholders’ awareness of CE. The investigation also covers major barriers for the implementation of strategies aligned to the CE model, and enabling factors for a transition from a linear economic model to a CE model in the construction industry in the U.S. A mixed-methods approach was deployed through a combination of online survey and interviews with AEC industry stakeholders from different regions of the U.S. Results revealed that some strategies are widely disseminated (i.e., open-loop recycling, selective demolition, and prefabrication), whereas others are hardly adopted (i.e., design for disassembly, design in layers, closed-loop recycling). Additionally, findings indicate budget and upfront costs, project schedule and timeline, lack of awareness and regulations, and current business models as major barriers for the implementation of strategies aligned to a CE model. Furthermore, four enabling factors for a transition to a CE model in the construction industry were identified (i.e., education and cultural change, data availability, policies and incentives, and novel voluntary stewardships). Notably, contributions of this study include fostering a much needed debate around circular construction and its challenges, and expanding the limited existing body of knowledge.

在过去的十年中，越来越多的环境关注和资源稀缺风险引起了人们对循环经济（CE）模型的关注。但是，与美国建筑环境中CE的使用状况有关的文献仍然有限。在这种情况下，本研究调查了美国建筑，工程和建筑（AEC）行业利益相关者对CE的认识。该调查还涵盖了实施与CE模式保持一致的策略的主要障碍，以及在美国建筑业中从线性经济模式向CE模式过渡的有利因素。对来自美国不同地区的AEC行业利益相关者进行在线调查和访谈 结果表明，一些策略得到了广泛传播（例如，开环回收，选择性拆除和预制），而其他策略却几乎没有被采用（例如，拆卸设计，分层设计，闭环回收）。此外，调查结果表明预算和前期成本，项目进度和时间表，缺乏意识和法规以及当前的业务模式是实施与CE模式保持一致的策略的主要障碍。此外，确定了在建筑行业过渡到CE模式的四个促成因素（即教育和文化变革，数据可用性，政策和激励措施以及新颖的自愿性管理）。值得注意的是，这项研究的贡献包括引发了关于圆形建筑及其挑战的急需的辩论，