A Review of Research into the Interface Properties of Ultra-high Performance Concrete and Normal Concrete

Ultra-high performance concrete (UHPC) is an emerging ultra-high performance cementitious fibre reinforcement material that has been widely used in the reinforcement of concrete structures. In this paper, the mechanical properties and durability of the interface between UHPC and ordinary concrete (NC) are compared and analysed in terms of the influencing factors, mechanical properties and durability of the UHPC-NC interface. The results show that the mechanical and durability properties of the UHPC-NC interface are excellent and significantly better than those of the NC-NC interface and that UHPC fibres and interface treatment have a significant impact on the interface bonding performance. The results of the research on the mechanical and durability properties of the UHPC-NC interface are summarised, and the research on the properties of the UHPC-NC interface is presented.