Utilising CO2 and waste to make concrete stronger, cheaper and cleaner
Concrete4Change has developed a novel process for carbon sequestration within concrete, taking flue gas and abundant calcium feedstocks to make a material that delivers lower cost, lower emission concrete.
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How the Technology Works and its Impact
Making materials from CO2
The innovation underpinning Concrete4Change is to produce a calcium based material made from CO2 that is added to concrete to improve strength, reduce cement content and permanently lock away CO2. The process can be broken down into four steps as below.
Recycled waste
Recycled waste
Abundant Calcium Waste
Our material is derived from abundant feedstocks, in particular calcium (waste) streams, turning waste into value and promoting a circular approach.
materials Preparation
Carrier Preparation
Reactivating the Calcium
Through C4C's process, the calcium from the feedstock is targeted for enabling the reaction with CO2
CO2 Sequestration
Load CO2 into Carrier
Permnanent Sequestration of CO2
The calcium is reacted with CO2 from flue gas to form a specific species of reactive calcium carbonate. The resultant material is 50% by mass CO2. By-products from the reaction are formed and valorised
Mix material With Concrete
Mix With Concrete
Mix with concrete
The reactive calcium carbonate is integrated into fresh concrete, enhancing its strength and durability while significantly reducing the cement content by up to 50%. No change to concrete production.
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The material is made from CO2 captured from flue gases industrial plants such as cement – providing a cost-effective route to CO2 utilisation which the industry needs.
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No change in concrete production line is required
Any source of CO2 can be used (Flue gas and purified CO2)
Material is made from waste calcium to minimise the carbon footprint
Applicable to all types of cement and concrete including pre-cast and ready-mix concrete
30x more CO2 sequestration than existing approaches for ready-mix concrete
Production cost of concrete containing C4C's material is cheaper than conventional concrete
Globally implementable
Adjust the numbers in the table to reflect your mix design and see how much carbon you can potentially remove with C4C technology. The amount of carrier added is ~0.5% by the mass of the cement in concrete. C4C concrete mix assumes a 20% reduction in cement as a result of the strength increase from the C4C carrier
Interested in becoming a partner?
Join us on the journey of creating a lower cost, lower emission pathway for concrete.
