混凝土动态耐久性研究进展

Research Progress of Concrete Dynamic Durability

20世纪中叶以来,全球因混凝土耐久性问题而产生的混凝土结构损耗日益加大,而最严重也最常见的耐久性问题之一就是冻融破坏。本文根据各学者对混凝土的耐久性试验研究成果,总结混凝土在冻融环境下的动态耐久性研究现状,并探讨冻融作用后混凝土动态力学性能的退化规律。在冻融作用基础上进行混凝土受化学腐蚀、盐侵蚀等因素影响的耐久性研究。最后对现阶段水工混凝土耐久性研究现状进行系统的总结,并对未来混凝土的耐久性研究方向进行展望。

Since the middle of last century,the loss of concrete structure caused by the durability of concrete has been increasing,and one of the most serious and common durability problems is freeze-thaw damage.Based on the results of durability test of hydraulic concrete by various scholars,this paper summarizes the research status of dynamic durability of hydraulic concrete in freeze-thaw environment,and explores the degradation law of dynamic mechanical properties of hydraulic concrete after freezethaw action.On the basis of freeze-thaw action,this paper studies the durability of concrete under the influence of chemical corrosion,salt corrosion and other factors.Finally,it systematically summarizes the current research status of hydraulic concrete durability,and prospects the future research direction of concrete durability.