A composite material composed of natural stone, plant-based carbon fiber, and biochar. This new type of house wall demonstrates the climate friendliness of this new building material. Compared to walls made of reinforced concrete, walls made of this new building material will have a more positive carbon footprint. The researchers' calculations show that the difference in carbon dioxide equivalent per square meter of house walls is 157.
Therefore, each individual component - natural stone, carbon fiber, and biochar - contributes to the negative carbon dioxide balance of the new wall elements. For example, when two natural stone slabs forming an exposed wall are cut to a certain size, a large amount of stone powder is generated. Due to its large specific surface area, this is highly reactive and permanently binds a large amount of climate damaging carbon dioxide solely through silicate weathering. The natural stone used is a type of rock from India, suitable for particularly high loads.