Ultra High-Performance Fiber-Reinforced Cementitious Composites (UHP-FRCC) has been developed to meet the recent requests for a more sustainable and longer life structures. UHP-FRCC is a highly dense, fiber-reinforced cementitious composite material that has a compressive strength of more of 150 MPa, high ductility, durability and energy absorption capacity compared with normal concrete. These high mechanical properties are achieved by the use of a high content of cementitious materials, a very low water/cement ratio and the incorporation of steel fibers. UHP-FRCC is good a solution for the repair, strengthening and seismic retrofitting of old structures. However, this high-performance material has a parallel high environmental impact: a large quantity of CO2 is released during the cement production.