Barriers to Construction and Demolition Waste Management in Australia: A Comparative Analysis for Advancing Circular Economy Practices

The Australian construction industry generated approximately 29.2 million metric tonnes (Mt) of construction and demolition waste (C&DW) in 2022–2023, of which about 23.7 Mt (81.2%) was recovered, primarily through recycling (80.6%). Recovery concentrated on concrete, bricks, and rubble from large constructions, while C&DW from smaller projects was often directed to landfills. Most recovered materials are downcycled, have low market demand and contribute to unstable markets and continued reliance on virgin materials. To investigate these gaps, nine semi-structured expert interviews, two case studies, and a SWOT (Strengths, Weaknesses, Opportunities and Threats) analysis were conducted. The findings were organised into four clusters: (1) regulatory and governance, (2) operational and technological, (3) procurement, cost and market, and (4) stakeholder management barriers significantly impact C&D waste management practices. The study recommends four drivers and six enablers to enhance circular economy 3R (reduce, reuse, recycle) practices, including standardisation and harmonisation of reused and recycled products’ quality and cost, mandating circular procurement, increasing incentives and penalties, on-site sorting, awareness and capacity building, and digital technology application for data management. This integrated approach can guide policymakers and practitioners in strengthening C&DW reduction practices and developing an economically viable market for reused and recycled products.