Ultra-High Performance Fibre Reinforced Concrete (UHPFRC)is charact erized by aunique combination of extremely low permeability, high strength and deformability. Extensive R&D works and applications over the last 10 years have demonstrated that cast on site UHPFRC is afast, efficientand price competitive method for the repair/re habilitation of existing structures. More recently, an original concept of ECO- UHPFRC with ahigh dosage of mineral addition, alow clinker content, and amajority of local components has been applied successfully for the reh abilitation of abridge in Slovenia. The objective of the present study is to evaluate the global warming impact of bridge rehabilitations with different types of UHPFRC and to compare them to more standard solutions, both on the basis of the bridge rehabilitation performed in Slovenia. Life Cycle Assessment (LCA)methodology is used. The analysis shows that rehabilitations with UHPFRC, and even more ECO-UHPFRC, have alower impact than traditional methods over the life cycle.