Review of Research on Ultra-high Performance Concrete

Authors gave a brief introduction to state-of-the-art developments and research progresses of ultra-high performance concrete(UHPC)in the world,to the fundamentals of material preparations and performance indexes.Attention was placed on critical review of the material preparation technologies,mechanisms of the super high performance,and superior material properties of UHPC and its engineering applications.Finally,critical future research directions were highlighted,including the optimal compositions of UHPC matrix,the setting and hardening progress,as well as the resulting micro-structure,the micro-mechanics analysis of fiber reinforcement and toughness improvement principle, mix design and preparation technology,testing methodology of material characteristics and its standardization.Engineering applications should be based on practical and innovative application research findings,economic benefits,and the establishment of suitable standards and specifications.The results show that it is clear that great advances have been achieved on both the fundamental research and theengineering application of UHPC.With environmental protection,sustainable development being more attention,UHPC has excellent prospects for development.