As part of the Innovation Forum of the Bundesverband Kalksandsteinindustrie e. V. (Federal Association of the Sand Lime Brick Industry) on 13.10.2021 in Hanover, Prof. Bernhard Middendorf gave a presentation on the recarbonation of sand lime bricks. In his lecture, he explained his research results on the recarbonation of sand-lime bricks and highlighted that with complete carbonation, up to 55 kg of_CO2 can be absorbed per ton of sand-lime brick to be produced. Furthermore, he showed possibilities for optimizing the_{CO2 balance} in sand-lime brick production. For example, by using alternative binders or by directly recycling the_CO2 during the autoclaving process.