Sand-lime bricks are made from the natural raw materials lime, sand and water, mechanically compacted and hydrothermally hardened. For the production of the required lime, the process generates approx. 1.2 tons of CO2 equivalents for one ton of material. By contrast, only about half the CO2 is emitted for one ton of cement. The aim of the project is to use cement as an alternative lime carrier. Due to the current 27 different types of cement and their different compositions, not all cements are suitable as quicklime substitutes.

In the course of the project, the potential of different cements as lime carriers will be analyzed in various mixing ratios with quicklime. The results will then be transferred from laboratory scale to practical application in various sand-lime brick plants, and the finished masonry bricks will be evaluated in terms of performance.