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, which 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.

- emission reduction potential based on an example project 

CO2-emission reduction potential for 1 m³ of concrete C25/30 with CEM II 42.5 N with a cement quantity of 342 kg/m³ and a CO2-footprint of 185 kg CO2

Technical components and incorporation
The Clim@Add® aggregate consists of up to 94% technical carbon. Hazardous components (toxic compounds, microplastics, etc.) are safely eliminated during pyrolysis through appropriate process control.
As a binder substitute, our Clim@Add® aggregate bonds with the concrete matrix. This means that no separate process is required and existing systems and placement mechanisms can be used.

We develop tailored solutions together with our customers in accordance with the requirements and conditions on site. Close involvement of all project participants from the start of the project is particularly important to us.

CarStorCon® Technologies
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. 


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.