Concrete technology

Technical carbon in concrete solutions

Concrete is the most widely used construction material in the world. And the demand for new infrastructure projects as well as maintenance measures will continue to rise. Here lies a great opportunity for the construction industry to become climate heroes through new business models and products and to store more CO₂ than they emit.

The incorporation of the aggregate we developed, Clim@Add®, creates the first climate concrete that can demonstrate improved material properties and even become climate positive.

Our experience shows that a substitution of the resource-intensive cement of up to 15% is possible. Together with the carbon sink potential of Clim@Add® and the natural recarbonation of the concrete, a positive climate balance can then be achieved. As our products are closely linked to local value chains, the respective carbon footprint is also dependent on local conditions.

The following graph describes the potential of the aggregate:    

CO₂ carbon sink

(in kg CO₂ eq per m³ concrete)



Technical components and incorporation
The Clim@Add® aggregate consists of up to 96% technical carbon. This has a carbon content of up to 87%. Components of concern (toxic compounds, microplastics, etc.) are safely eliminated during pyrolysis by appropriate process control.
As a binder substitute, our Clim@Add® aggregate combines with the concrete matrix. Therefore, no separate process is necessary, existing plants and placement mechanisms can be used.

We create permanent carbon sinks
When technical carbon is incorporated into concrete and asphalt, the carbon forms a bond with the product matrix, thus the sinks remain permanent and can even last beyond the life of the products.
Our technology is also compatible with existing sustainability measures such as recycling solutions.

CarStorCon® Technologies

Mix of measures instead of individual solutions

Various approaches already exist in the industry to make concrete production more sustainable. For example, alternatives to sand and gravel are already being used in mixes. Much effort is also being put into pursuing and optimizing the replacement of cement through the use of granulated blast furnace slag and similar options. This will also help to further reduce the footprint of currently around 521 kg CO2 per t of cement. In the area of negative emission technologies (NET), there are promising approaches to capture the emitted CO2 at the cement plant stack using CCS (carbon capture and storage) technology.

Our technology is already applicable, has enormous potential worldwide, and requires no additional energy input. In particular, however, the incorporation of Clim@Add® can be combined with most other developments. We are therefore convinced that the carbon sinks we create will make a lasting and significant contribution to reducing the global concrete footprint. 

We develop tailored solutions together with our customers, according to the requirements and conditions on site. A close involvement of all project participants from the beginning of the project is particularly important to us.

CarStorCon® Technologies


short and sweet

  • 1 kg of Clim@Add® can store up to 3 kg of CO2.
  • Clim@Add® is easy and direct to install.
  • Clim@Add® can be used to adapt material properties and thus replace additives from fossil raw material sources.
  • The carbon used is EBC certified.
  • In accordance with the Closed Substance Cycle Waste Management Act, the solution represents a higher-value utilization stage compared to incineration.
  • Biogas and heat generated during production can be used as CO2-neutral energies.


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