超高性能混凝土在结构中的应用

Application of Ultra-High-Performance Concrete in engineering structures

超高性能混凝土(UHPC)具有超高的力学性能和超高的耐久性能,被认为过去三十年最优异的水泥基复合材料之一,能较好地适应当前土木工程结构大型化、复杂化的趋势,也能符合社会可持续发展对高性能材料发展要求。近年来,UHPC材料与结构已成为热点研究方向,相关专利与论文数量呈指数型增长,UHPC应用数量、范围与地区不断攀升,各类规范与标准也在不断地制定与修订之中。文章围绕超高性能混凝土的研究与工程运用现状,概括总结超高性能混凝土的性能特点,梳理超高性能混凝土在桥梁工程、建筑工程以及防护工程等领域的应用现状,结合笔者团队在超高性能混凝土应用方面的实践感悟,探讨超高性能混凝土规模化应用的关键环节,为超高性能混凝土材料今后进一步研发与应用提供参考。

Ultra High-Performance Concrete(UHPC)has ultra-high mechanical properties and ultra-high durability,which can better adapt to the current trend of large-scale and complex civil engineering structures in civil engineering,and meet the requirements of sustainable development for the development of high-performance materials.It is considered as one of the most excellent cement-based materials in the past 30 years.In recent years,UHPC materials and structures have become a hot topic in civil engineering.The number of UHPC-related patents and papers is growing exponentially.The number,scope and area of UHPC applications are increasing greatly.Various specifications and standards are also being developed and revised.Based on the research and engineering application status of UHPC,this paper summarizes the performance characteristics of UHPC,describes the application status of UHPC in the fields of bridge engineering,construction engineering and protection engineering,and discusses the key challenges of large-scale application of UHPC in combination with the experience of the authors’team in the application of UHPC.It can provide reference for further research and application of UHPC materials in the future.