Enhancing Circular Construction Through Structural Steel Reuse: Case Study of Champlain Bridge

Abstract

- The construction industry plays a critical role in tackling the challenges of climate change, carbon emissions, and resource consumption. Current practices predominantly adhere to a linear supply chain model that gives insufficient attention to the End-of-Life (EOL) phase of structures. Transitioning to Circular Construction (CC) is essential for minimizing waste and mitigating negative environmental impacts. While recycling structural steel is widely utilized at the EOL, it is energy-intensive and may degrade material quality. In contrast, steel component reuse presents a more sustainable option, requiring minimal alterations and significantly reducing embodied energy and Greenhouse Gas emissions. The main aim of this study is to advance CC by developing a framework for the catalyzing factors that can enhance the efficacy of the deconstruction process and structural steel component reuse. These factors were gathered through a comprehensive literature review. The identified factors were then mapped to a high-profile deconstruction project, the original Champlain Bridge deconstruction, to assess the challenges and initiatives involved in improving deconstruction efficiency and optimizing the reuse of structural steel components. The data of the deconstruction process and structural steel reuse were obtained through series of meetings with the Jacques Cartier and Champlain Bridges Incorporated (JCCBI) team. The numerical data regarding quantities and weights of structural steel was analyzed to assess the types of reusable steel components. Finally, the paper highlights future research areas for improving the efficiency of the value chain processes, maximizing the steel component reuse, improving the decisionmaking at the EOL.