New Cement with huge Carbon Reductions

New Cement with huge Carbon Reductions

If successful, the new cement will generate more CO2 reductions annually than all the traffic in a country.

Prof. Dr. Ir. H.J.H. Brouwers (University Eindhoven) investigates whether cement can be made of a steel industry waste: slag (metallurgy).

If successful, the new cement will generate more CO2 reductions annually than all the traffic in a country.

Cement from Steel waste materials

Metallurgy arises from the conversion of iron into steel. Every year, about 125 million tonnes of metallurgy remains as a waste product. This is largely down graded into asphalt. That’s a pity, according to professor Jos Brouwers. The mineralogical composition is comparable with cement. The products have the same components, only in a different relationship.

The cement industry is known to emit very much CO2: 5% of global global emissions. A cement substitute without additional CO2 emissions would be very welcome.


The researchers will study the physical and chemical properties of the steel smudge with the latest methods. They will also examine in detail what different additions will own cementitious qualities. Furthermore, they will design different new types of cement and concrete, and test it.

“Important is that you can test the steel lacquer composition by adjusting the steel production processes,” explains Brouwers. “You can keep the steel quality even and still ensure that the steel lacquer properties are more favorable.”


And there are more advantages: Steel companies now have to pay to get rid of their waste. It has a negative value. If we succeed, or even partially, that can only yield tens of millions of euros.

Reducing environmental impact

Brouwers thinks that it will be possible to make a cement that can replace ‘normal cement’ from steel waste materials. We will need about twice as much for the same result, but the new cement is still suitable for many common applications.

That new type of cement could save millions of tonnes of CO2.

By comparison, all traffic and transports in a small country like the Netherlands results in emissions of around 30 million tonnes per year.

Brouwers’ group receives STW 750,000 Technology Foundation to investigate this from the High Tech Materials Financing Program.

The project is called ‘High-end application or converter steel impact in sustainable building materials’ and will take four years


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