摘要
本文调查了去冰盐对混凝土平衡饱水度的影响,以及干湿或冻融循环条件下去冰盐对混凝土破坏的影响。结果表明:(1)盐冻剥蚀比水冻剥蚀更严重,其主要原因是去冰盐大大提高了混凝土平衡饱水度;(2)在干湿条件下,去冰盐可产生足够高的盐结晶使混凝土膨胀和破坏,它也是去冰盐剥蚀机理之一。
In this paper, effects of the deicer on the degree of saturation in concrete and on the scaling damage of concrete due to the drying-wetting or freezing-thawing cycles were investigated. Results showed that: (1) the scaling of concrete exposed to deicer solutions was much severer than that exposed to water under the freezing-thawing cycle condition, and its main reason was that the deicer increased the degree of saturation in concrete;(2) under the drying-wetting cycle condition, the deicer could produce crystallization pressure high enough to expand and damage the concrete, and it was one of the deicer scaling mechanisms as well.
关键词
混凝土
去冰盐
饱水度
物理性质
concrete
deicer
degree of saturation
salt crystallization pressure
freezing-thawing cycles and drying-wetting cycles
