Digital Circular Timber (DCT). Timber reuse through design and fabrication automation.

This doctoral thesis delves into the critical examination of leveraging digital technologies and Industry 4.0 strategies to enhance the sustainability and circularity of timber construction, with a particular focus on post-disaster reconstruction scenarios. Amidst the growing imperative for low-carbonfootprint materials and the reduction of construction and demolition waste, this research foregrounds the potential of reusing timber elements as a pivotal strategy in fostering circular economy practices within the construction sector. By addressing the dual challenges of immediate disaster recovery needs and longterm sustainability goals, the thesis articulates a comprehensive exploration of the integration of digital technologies in the assessment, sorting, and repurposing of timber debris to facilitate sustainable construction practices. The research is structured around three core questions: the role of technology in enhancing the upcycling of reclaimed timber, the integration of automation in timber repurposing, and the contribution of digital technologies to aligning post-earthquake reconstruction with circular economy principles. Through a methodological framework that combines analytical approaches, design synthesis, empirical experimentation, and technology transfer, the thesis investigates innovative methods that extend the lifespan and utility of salvaged wood, assesses the advantages of automated systems in streamlining timber repurposing workflows, and explores the application of digital technologies in promoting sustainable and resilient rebuilding efforts. The findings demonstrate that digital technologies and automated systems can significantly revolutionize the timber repurposing workflow, making it more efficient, economically viable, and aligned with sustainability principles. This research contributes to advancing circular economy practices, promoting sustainable reconstruction, fostering innovation in timber repurposing, and informing policy and standards development. By bridging the gap between theoretical knowledge and practical application, this thesis not only addresses the immediate challenges posed by post-disaster reconstruction but also contributes to the broader objectives of sustainability and circular economy within the built environment.