Cement could be made from waste, reduce industry's carbon footprint

illuminem summarises for you the essential news of the day, reviewed by our editorial team. Read the full piece on Interesting Engineering or enjoy below:

🗞️ Driving the news: Australian researchers from the University of Adelaide have examined how refuse-derived fuel (RDF), made from processed non-recyclable waste, could help reduce fossil fuel consumption and landfill disposal in cement manufacturing
• Their review highlights its potential to support industrial decarbonisation, while stressing that broader adoption requires consistent fuel quality, clearer regulations and stronger evidence of environmental and economic benefits

🔭 The context: Cement production requires extremely high temperatures, making its kilns energy-intensive and heavily reliant on fossil fuels
• RDF can be used alongside conventional fuels through co-processing, but inconsistent terminology and standards — particularly the distinction between RDF and solid recovered fuel (SRF) — complicate research comparisons and regulatory oversight

🌍 Why it matters for the planet: Cement manufacturing accounts for an estimated 8% of global CO₂ emissions
• Replacing some fossil fuels with suitable waste-derived alternatives could help reduce emissions while diverting non-recyclable waste from landfills, although the overall climate benefits depend on fuel composition, processing and environmental controls.

⏭️ What’s next: The researchers call for stronger quality assurance systems, clearer regulatory frameworks and further assessment of environmental and economic impacts
• The review analysed more than 200 research articles published between 1991 and July 2025
• These steps could help cement manufacturers determine when RDF can be used safely and reliably

💬 One quote: Geethmi Thisakya, PhD candidate at the University of Adelaide, said: “Cement manufacturers need confidence that alternative fuels will perform consistently, meet environmental requirements and support safe, reliable production.”

📈 One stat: More than 200 research articles — the number reviewed by the University of Adelaide team, covering studies published from 1991 to July 2025.

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