Austria has an annual cement consumption of 5.2 million tons and emits around 2.9 million tons of CO2 per year during production1. In order to reduce CO2 emissions, alternatives to conventional reinforced concrete are being sought worldwide. In this regard, the BasaltClayCrete project is developing basalt-reinforced clay building materials that are tailored to low to moderate performance levels and have a minimal environmental impact. Fiber reinforcement, especially from natural fibers such as basalt, improves the mechanical properties of the clay concrete to be developed and makes the material suitable for construction. Basalt fibers (BF) are extracted from basalt rock, a natural material with a melting temperature between 1500 and 1700 °C.