ABSTRACT
Hong Kong faces significant construction waste, particularly concrete, driven by urban renewal. While international cases explore concrete reuse, Hong Kong primarily focuses on recycling. Direct concrete reuse offers clear benefits in reducing carbon footprints and the need for new materials. This research aims to identify existing gaps to establish a concrete direct reuse workflow in Hong Kong. A comparative study is undertaken using Swiss models, involving three key phases: data collection and analysis, attitude survey, and life-cycle assessment. The results show bi-directional reuse approach helps to improve Hong Kong’s demolition practices. Industrial attitude poses barriers, incentives and outlooks. A demonstrator shows direct reuse only generate 1% carbon footprint compared to new C20 concrete production by using natural and recycled aggregates. Political, digital, financial, and mechanical efforts need to be achieved to move toward carbon neutrality in Hong Kong, addressing challenges like climate change, urban renewal, and construction waste management.
