The durability of concrete determines the safety and stability of its service,and plays an important role in the long-term service process,which affects its service life.The durability of concrete is closely related to the environment.Freeze-thaw damage of concrete caused by alternating positive and negative temperatures in cold regions is one of the important reasons for concrete durability insufficiency.Two typical deterioration forms of concrete freeze-thaw durability(internal bulk cracking and surface salt frost scaling)are introduced,including the characteristics of freeze-thaw damage,commonly used characterization methods and damage mechanisms.At the same time,the freeze-thaw damage mechanism of non-air-entrained concrete and air-entrained concrete,ordinary concrete and high performance concrete are compared and analyzed,especially the freeze-thaw damage characteristics of high performance concrete.
关键词
混凝土/冻融/冻胀开裂/盐冻剥蚀/破坏机理
Key words
concrete/freeze-thaw/internal bulk cracking/surface salt frost scaling/damage mechanism
维普
万方数据