One of the recent breakthroughs in concrete technology is Ultra-High Performance Concrete (UHPC) with its high durability and a compressive strength comparable to that of steel. It permits the design of sustainable concrete structures such as wide-span bridges, filigree shells and highrise towers and allows for spectacular architectural designs. In 2004 and 2008, the International Symposia on UHPC took place at the University of Kassel. The state-of-the-art of the UHPC technology was presented at over 150 lectures. Since then, the set of knowledge about the Ultra- High Performance Concrete has been substantially widened and its practical application has rapidly increased worldwide.