Since 95% of the Construction and Demolition Waste (CDW) is down-cycled and the material value is not effectively recovered, the Dutch construction industry strives for implementing Circular Economy (CE). From the recycling/reusing perspective, a key enabler towards CE is Industrial Symbiosis (IS). Although IS has been widely applied in manufacturing industries, its implementation is unclear in the construction industry. Particularly, the potential IS economic convenience is hard to predict in the highly fragmented construction supply chain. This study explores the IS based on the Recycled Concrete Aggregates (RCA) in the context of a concrete waste supply chain in the Twente region of the Netherlands. The research tackles with the CE challenge of lacking economic incentives by investigating the Industrial Symbiosis Network (ISN) emerged by replacing Primary Concrete Aggregates (PCA) with RCA. An Agent-Based Modelling (ABM) approach is proposed by integrating Geographic Information Systems (GIS) to present the dynamic supply-demand of RCA. Besides, supply chain actors are simulated as negotiable agents in a platform model to reveal the IS collaboration dynamics under different economic scenarios. It is found that the IS exists in the construction industry but only in an implicit manner because the RCA treatment requires the collaboration of multiple actors across substantial temporal and spatial differences. The study enriches the IS taxonomy by defining Implicit IS and provides instruments to support the decision-making of business collaborations and policy-making for a circular construction industry.

由于95％的建筑和拆除废物（CDW）进行了下循环，并且材料价值没有得到有效回收，因此荷兰建筑业努力实施循环经济（CE）。从回收/再利用的角度来看，实现CE的关键因素是工业共生（IS）。尽管IS已广泛应用于制造业，但在建筑行业中尚不清楚其实施方式。特别是，在高度分散的建筑供应链中很难预测潜在的IS经济便利性。本研究在荷兰特温特地区的混凝土废物供应链中探索了基于再生混凝土骨料（RCA）的信息系统。该研究通过调查工业共生网络（ISN）（用RCA代替主要混凝土集料（PCA））来应对CE缺乏经济诱因的挑战。通过集成地理信息系统（GIS）提出了基于代理的建模（ABM）方法，以提出RCA的动态供求关系。此外，在平台模型中将供应链参与者模拟为可谈判代理，以揭示不同经济情景下信息系统协作的动态。发现IS存在于建筑行业中，但仅以隐式方式存在，因为RCA处理需要跨越大量时间和空间差异的多个参与者的协作。