Reclinker raises £10 million to turn demolition waste into cement inside steel furnaces

Oct. 5, 2026 — Reclinker, a University of Cambridge spinout, has closed a £10 million Series A to move its cement recycling process from trials to commercial production in Cardiff, its investors announced. Here's what happened, what it cost, and what went wrong.

Cost and outcome (as of Oct. 8, 2026)

Outcome: The round was co-led by Clean Growth Fund and AP Ventures, with the Development Bank of Wales and existing investors Zero Carbon Capital and Cambridge Enterprise Ventures. ZCC, which led the £2.25 million seed in 2024, says the round was oversubscribed. (Cambridge Enterprise, Oct. 8, 2026; Zero Carbon Capital, Oct. 5, 2026)
Cost: The cementitious slag "is expected to deliver an immediate 50% reduction in emissions" at "cost parity with conventional cement," Cambridge Enterprise says. No price or plant cost was given. (Cambridge Enterprise, Oct. 8, 2026)
Scale: Reclinker has made over a thousand tonnes of clinker across trials at 7 Steel UK's Cardiff plant, according to ZCC. (Zero Carbon Capital, Oct. 5, 2026)

How it works, as described

Reclinker recovers cement paste from demolition waste and turns it back into clinker inside electric arc furnaces already used to recycle steel, producing new clinker and recycled steel at the same time, with no kiln, no quarried limestone and no fossil-fuel heat, the investors say. The process was developed at the University of Cambridge and described in Nature. (Cambridge Enterprise, Oct. 8, 2026; Zero Carbon Capital, Oct. 5, 2026)

ZCC says the recycled paste removes calcination emissions, the furnaces can run on renewable power, and the paste replaces the lime flux used in steelmaking, cutting emissions on the steel side too. Because it uses existing furnaces rather than new kilns, ZCC calls it capital-light to replicate. (Zero Carbon Capital, Oct. 5, 2026)

When ZCC first invested, the process had been proven in a 7-tonne furnace through the Innovate UK-funded Cement 2 Zero project at the Materials Processing Institute in Middlesbrough. Since then, ZCC says, Reclinker secured its first commercial sales in partnership with Cemblend. (Zero Carbon Capital, Oct. 5, 2026)

Why investors say there's demand

Cement causes about 7% of global CO₂ emissions, roughly three times aviation's, and most comes from making clinker, both sources say. Blast-furnace slag, long used in low-carbon cement blends, "is disappearing fast as steelmakers move away from blast furnaces," leaving concrete producers short, Cambridge Enterprise says. (Cambridge Enterprise, Oct. 8, 2026; Zero Carbon Capital, Oct. 5, 2026)

Large concrete users have stated their intent to introduce significant volumes of low-carbon materials over five years under the Innovate UK Advance Market Commitment, which the investors cite as validation. The money will scale Cardiff and support replication at furnace sites in Europe and the U.S. (Cambridge Enterprise, Oct. 8, 2026; Zero Carbon Capital, Oct. 5, 2026)

"This oversubscribed round sends a strong signal that UK investors are serious about decarbonisation," said CEO Bill Yost. AP Ventures' Andrew Hinkly called it "a unique, scalable, and cost-competitive route to low-carbon clinker." Gabriella Nizam of 7 Steel UK called it a "world-first technology." Stephen Price of Clean Growth Fund described it as "industrial symbiosis," and Gareth Mayhead of the Development Bank of Wales said the deal builds "on the successful industrial trials already undertaken in Cardiff." Christine Martin of Cambridge Enterprise Ventures said cement is "the second most-used material on the planet." (Cambridge Enterprise, Oct. 8, 2026)

What went wrong

Two production figures. ZCC says over a thousand tonnes; Cambridge Enterprise says thousands. We use the lower. (Zero Carbon Capital, Oct. 5, 2026; Cambridge Enterprise, Oct. 8, 2026)
Expected, not proven. Cambridge Enterprise says the 50% cut is "expected"; ZCC states it as fact. Neither shows a third-party life-cycle assessment. (Cambridge Enterprise, Oct. 8, 2026; Zero Carbon Capital, Oct. 5, 2026)
Investors' own words. Both announcements come from shareholders. We did not read the Nature paper or an independent test of the cement.
What we don't know yet: Reclinker's planned annual output in Cardiff, its price, and where the first sites outside Wales will be.

Our follow-up question for Reclinker

What annual clinker output is planned for Cardiff, and has an independent life-cycle assessment confirmed the 50% cut?

Sources

Zero Carbon Capital, “Concrete commitment: we're backing Reclinker again at Series A,” Oct. 5, 2026. zerocarbon.vc
Cambridge Enterprise, “Reclinker secures £10 million Series A to scale low-carbon cement technology,” Oct. 8, 2026. enterprise.cam.ac.uk

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