摘要
冻融破坏是寒冷地区混凝土建筑物最主要的病害。综述了近年来冻融与碳化、冻融与氯盐侵蚀、冻融与机械荷载等复合作用下混凝土耐久性已有的研究成果。指出多因素的协同作用将加剧混凝土的损伤程度和失效进程,降低混凝土建筑物的使用寿命。最后讨论了冻融与其它因素复合下的混凝土失效模式,提出应在工程实际病害调查的基础上加强多因素复合作用机理、叠加效应的研究,并适度地对结构构件层次的耐久性能开展一定的研究。
The failure induced by freeze-thaw action is a main deterioration of concrete buildings in cold regions. The existing research results of concrete durability under the combined action of freeze-thaw and other factors are summaried and introduced. The damage degree and failure process are expedited and the service life of concrete buil-dings is significant reduced because of the synergistic effect of freeze-thaw and carbonation, freeze-thaw and chlo- ride, freeze-thaw and mechanical load etc. The failure mode of concrete under the combined action is also discussed. At last, the further study on the combined action mechanism and synergistic effect is put forward based on the deterioration investigation of actual engineering. Some research should be carried out on the durability of structure or members level in the future.
出处
《材料导报》
CSCD
北大核心
2011年第19期143-146,154,共5页
Materials Reports
基金
国家“973”计划课题(2009CB623203)
国家自然科学基金(50739001)
宿迁学院重点科研基金(2011KY22)
关键词
混凝土
耐久性
冻融循环
多重破坏因素
concrete, durability, freeze-thaw cycles, multiple damage factors
