除冰盐浓度对混凝土盐冻影响的研究

为研究除冰盐浓度对混凝土盐冻破坏的影响,对浓度分别为0％、1％、3％、5％和7％的NaCl除冰盐溶液冻结形成的盐水冰进行单轴无侧限抗压破坏以及混凝土0％、3％的NaCl溶液慢冻循环试验,得出盐水冰的浓度与弹性模量的关系以及混凝土随冻融次数增加力学性能的变化,通过改善后的胶剥落理论,对除冰盐溶液在中等浓度时混凝土产生的盐冻剥蚀破坏最为严重的现象给出了合理解释.

Reserch on the effect of concentration of de-icing salt on concrete salt-sacling

To study the effects of concentration of de-icing salt on salt sacling,two groups of tests were conducted to research the relationship between the concentration of brine ice and the elastic modulus as well as the changes of concrete mechanical properties with the increase of freeze-thaw times.The first group of test was conducted on brine ice which were frozen from NaCL de-icing solution at the concentration of 0%,1%,3%,5% and 7%,respectively under uni-axial unconfined compressive load;while the other groups were conducted on concrete speciment with NaCL de-icing solution at the concentration of 0% and 3% freezing and thawing cycle test.Based on the test results,a reasonable explanation is discovered for the phenomenon that when the concentration of de-icing salt is moderate,the most serious salt scaling will occur.