Life cycle assessment (LCA) of ultra high performance concrete (UHPC) structures

Abstract: The excellent mechanical properties of UHPC are mainly achieved by the use of a high amount of energy-intensive raw materials like Portland cement or micro steel fibres. Due to very high strength, it is possible to reduce the cross-sectional area and thus the weight of structures. On the one hand, a smaller amount of raw materials is needed, but, on the other hand, the portion of energy-intensive constituents must be increased. Hence the extent to which environmental effects of construction can be reduced by using UHPC was determined. Therefore the ecological impact was determined at a materials as well as on a structural level. The ecological impact of UHPC structures was also compared to structures made of conventional materials.