Development of steel circularity passport: Literature review, research gaps, and program rules in New Zealand

This article conducted a systematic literature review to find the most recent progress, barriers and opportunities in developing building material passports for structural steel reuse. To reuse steel a Circular Economy shall be implemented. A steel circular economy adoption requires the development of steel circularity passports, structural steel reusability assessment and reversible structural design. A programme rule was presented that can serves as a guideline for the development of a steel circularity passport in New Zealand. The programme rule outlined essential data and details, data resources and reliability, and steel identification process. Finally, a case study was used to demonstrate the significant benefits of applying the proposed programme rule in mitigating challenges presented by unidentified structural steel components. The 18-storey former council building has total 4,600 square meters located in Auckland downtown, New Zealand. It was found regulatory, technical, and economic barriers shall be addressed to enable steel reuse in New Zealand and presence of steel passports can facilitate steel reuse in practice by addressing the barriers in New Zealand.