Cement-free construction materials show promise

On a Deutsche Bahn project, PORR is using a sustainable construction material developed in-house for the first time. The new annular gap mortar is bound with granulated slag, a recycled product, instead of cement. The pilot project has been a complete success and the practically cement-free construction material has already been patented. PORR is now looking for further cooperation partners.

For the Filder Tunnel, which is part of Stuttgart 21, PORR, together with the German company MC-Bauchemie, developed and used an annular gap mortar

28 November 2022
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Cement production, which is used in many building products, including shotcrete and annular gap mortar, accounts for 8% of global greenhouse gas emissions.

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