From the region back to the region. Calcium silicate stones consist of the natural raw materials lime, sand and water and are produced regionally in a low-energy process without chemical additives. This "purity command" ensures that the building material recovered from buildings can be recycled as an aggregate for the production of new stones. KS* recycled stone blocks were developed on this basis, thus laying the foundation for a functioning circular economy with reclaimed KS* masonry.
