In Finland, carbon dioxide curing technology developer Carbonaide Oy has announced a "significant step forward" to transforming the construction industry and the carbon credit markets. Castrén & Snellman Attorneys Oy (Castrén & Snellman), a compatriot law firm, will purchase the first certified carbon credits created through Carbonaide's proven technology for carbon dioxide mineralization in concrete. This marks the beginning of a new era in which concrete production can act as a source of carbon credits in the voluntary carbon markets (VCM), delivering both environmental and economic benefits.
Concrete is one of the most used and most versatile materials in the world. It is also a major source of greenhouse gas (GHG) emissions, making low-carbon concrete a vital technology in reaching global climate targets.
Carbonaide has developed a proprietary concrete curing technology that uses captured carbon dioxide (CO2) in the process, reducing overall emissions in concrete production.
This is achieved by using less cement and CO2 mineralisation in the curing process, transforming concrete into a carbon sink.
Most importantly, Carbonaide’s process produces stronger concrete and faster production, making it a technologically viable alternative to traditional production.
Exact measurement and permanent storage
Carbonaide offers carbon credits based on CO2 mineralization in concrete, turning concrete factories into carbon sinks.
With multiple implementations underway, the Carbonaide credits are now available to companies seeking reliable solutions for storing carbon removed from the atmosphere.
Carbonaide’s curing technology transforms gaseous CO2 into stable carbonate minerals within concrete, ensuring permanent storage even if the concrete were demolished.
A key feature of the technology is a service platform that allows the exact measurement of CO2 mineralised in each production batch.
This means that the amount of carbon stored can be determined without relying on assumptions and estimates.
Carbon credit sales strengthen the business case
According to Carbonaide, its CO2 curing system improves production efficiency and enables cement savings in concrete production, reducing both emissions and costs.
When combined with revenue from carbon credit sales, the business case becomes even stronger, offering extremely short payback times.
The secret to economically viable carbon-negative concrete lies in using CO2 to enhance production while storing it permanently. In addition to offering reliable carbon storage for credit buyers, the credit sales open a new revenue stream for both Carbonaide and concrete manufacturers who are Carbonaide customers, making green concrete profitable, said Tapio Vehmas, CEO of Carbonaide.
The credits purchased by Castrén & Snellman will be based on permanent CO₂ storage at the Lakan Betoni concrete factory in Joensuu, Finland.
As previously announced, Lakan Betoni is implementing the Carbonaide technology, with production expected to start in the first quarter of 2026.
To ensure the highest standards of verification, the credits will be issued in cooperation with Isometric, which acts as the certification partner for the carbon credits.
The mitigation of global warming calls for rapid emission reductions, but also for new technologies that can capture and store carbon permanently at scale. Carbon credits are a vital tool in financing the solutions that the planet acutely needs. By cooperating with Carbonaide, C&S can contribute to the development of the voluntary carbon markets. We are proud to partner with a research-based Finnish startup that has the potential to transform the built environment into a carbon sink, said Anna Kuusniemi-Laine, ESG Partner at Castrén & Snellman.
