Welsh hydrogen-fuelled asphalt at Criggion: emissions and scale-up lessons for engineers
Reviewed by Tom Sullivan
First reported on The Construction Index
30 Second Briefing
Heidelberg Materials has produced 1,303 tonnes of asphalt at its Criggion quarry in Powys using 100 per cent hydrogen in place of liquid fossil fuels, in what is claimed as the UK’s first hydrogen-fuelled asphalt production run. The trial, part-funded under DESNZ’s Industrial Hydrogen Accelerator, consumed 4,522 kg of hydrogen and cut scope 1 emissions by 76 per cent, equating to a 23 per cent reduction in product carbon footprint and 25,105 kg of CO₂ saved. If replicated across UK asphalt plants, the approach could abate around 450,000 tonnes of CO₂ annually, pending proof of commercial viability.
Technical Brief
- Heidelberg has not yet disclosed any production cost or fuel price comparison versus conventional liquid fuels.
- Company frames hydrogen fuel-switching alongside CCS, alternative/secondary materials and circularity as parallel decarbonisation levers.
- Heavy industry segments where direct electrification is difficult are targeted by Heidelberg as priority hydrogen use-cases.
- If commercialised, similar hydrogen conversions would mainly affect burner design, fuel storage, and on-site safety management.
Our Take
Among the 17 hydrogen-tagged pieces in our database, most focus on power generation or haulage, so using 100% hydrogen at Heidelberg Materials’ Criggion plant pushes hydrogen deeper into process heat applications where electrification is harder.
A 76% cut in scope 1 emissions at a UK asphalt site suggests hydrogen combustion could materially ease compliance pressure from the Department for Energy Security & Net Zero on hard-to-abate industrial heat, especially as carbon pricing tightens.
If the 23% product-level carbon footprint reduction were replicated across UK asphalt output, it would give Heidelberg Materials UK a concrete differentiator in low-carbon tenders for road and infrastructure works, particularly where public-sector clients must evidence embodied-carbon cuts.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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