From Policy to Practice: A Global Review of Circular Economy Strategy Documents in Construction Using NLP
分析了57个国家建筑业循环经济政策文件，用自然语言处理技术将政策声明映射到10R层级，发现全球以回收和再利用策略为主，且先进策略不限于发达国家，为政策设计提供了聚类分析框架。
ABSTRACT This study explores how circular economy (CE) principles are incorporated in construction‐related policy roadmaps worldwide, addressing the growing need for effective resource strategies in a highly material‐intensive sector. National strategic CE documents from 57 countries were analyzed using natural language processing techniques, and then their policy statements were systematically mapped to the 10R hierarchy. A constrained cluster analysis identified five distinct country groupings: preventive, downstream revalorization, upstream revalorization, downstream life extension, and upstream life extension. The results show that revalorization‐focused strategies, particularly recycling and recovery, dominate globally and represent the most accessible entry point for CE adoption in construction. Contrary to conventional assumptions, advanced circular strategies are not confined to economically developed countries in the policy documents but are shaped by institutional capacity and contextual factors. By revealing multiple policy pathways to circular construction, the study provides a cluster‐based analytical framework that supports more context‐sensitive and effective CE policy design.