NaCl溶液结冰压的影响因素研究

Factors Influencing the Pressure of Ice Formation in NaCl Solution

关键词:  氯化钠溶液  结冰压  饱水度  约束条件

Key words:  NaCl solution,pressure of ice formation,degree of saturation,restraint condition

摘要:

提出了1种测定NaCl溶液结冰压力的新方法,并测定了约束条件、NaCl浓度、饱水度对NaCl溶液结冰压的影响,结果表明：在强约束条件下水的结冰压非常高,约为40.3 MPa,但NaCl溶液结冰压随NaCl浓度的增加以及约束程度和饱水度的降低而减小.这些结果对分析和理解混凝土受冻破坏,特别是混凝土盐冻破坏机理非常有益.

Abstract:

A new method to measure the pressure of ice formation was proposed in this paper,and the effects of factors on pressure of ice formation were investigated,such as NaCl concentration,degree of saturation and restraint conditions.Results show that pressure of ice formation is very high at the strong restraint,about 40.3 MPa for water and is reduced with the increase of NaCl concentration,and with the decrease of the degree of restraint and saturation.These results are useful for understanding the mechanisms of the frost damage,especial for the understanding of the frost damage in salt solution.