A review on damage mechanism of ultra-high performance concrete under loading and erosion

As a new type of cement-based engineering material with excellent strength and durability, ultra-high performance concrete (UHPC) has been widely used in bridges, marine engineering and other constructions. In the actual service environment, the microstructural damage of UHPC under loading accelerates the invasion of erosive ions, which in turn affects the structural performance. Erosive ions such as SO42- and Cl- lead to non-uniform degradation of UHPC, which makes the internal stress of UHPC heavy under loading, changing the microstructure damage path, resulting in aggravated structural damage and shortened service life. This paper summarizes the research progress of UHPC performance damage under loading and erosion, summarizes the damage mechanism of UHPC, discusses the influence of loading and erosion on the performance of UHPC. Based on the existing knowledge, new insights, suggestions for improvement and directions for further research are proposed for the damage mechanism of UHPC.