Carbon8 Systems

its CircaBuild aggregate, produced by accelerated carbonation of a captured CO2 stream, is used in trials by CCP Ltd (SigmaRoc UK) to manufacture cement-free carbon-negative concrete blocks under the Greenbloc technology, turning captured CO2 into a permanent construction-material store.

Country: United Kingdom

Operating CO2-mineralised aggregate

Coverage

	CN	EU	US
cdr-carbon-management	✓	✓	✓

Regulatorsepaademenea

Verifiable facts

Fact	Value	Source
Capacity	36,000 tonnes per year at the Brandon facility as of early 2014.	exa.ai · gre.ac.uk
Certification	ISO 14001, OHSAS 18001, and ISO 9001 compliance.	exa.ai
Regulatory approval	End of Waste status approved by the UK Environment Agency in 2011.	exa.ai · impact.ref.ac.uk
Production site	Brandon (Suffolk), Medway Campus (Chatham, Kent), and Wraxhalls (storage). A facility was also planned/permitted in Avonmouth.	assets.publishing.service.gov.uk · exa.ai · business-sale.com · cemnet.com
Headcount	11 employees as of November 2025.	impact.ref.ac.uk · business-sale.com · cemnet.com · einpresswire.com · quantuma.com
Revenue	In accounts for the year to December 31, 2024, fixed assets were valued at ~£3.8M and current assets at ~£646,000; net liabilities exceeded £1.1M. medium confidence	business-sale.com

Independent sources: assets.publishing.service.gov.uk · business-sale.com · cemnet.com · einpresswire.com · exa.ai · gre.ac.uk · impact.ref.ac.uk · quantuma.com

Technologies

Name	Cluster	Risk
Bio-cementation & MICP materials	cdr-carbon-management	Medium	→

Compiled by BIOECON from primary sources.

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