Research on the Effect of Concentration and Type of De-Icing Salt on Concrete Salt-Scaling
To study the effect of concentration and type of de-icing salt on salt scaling based on the mechanism of glue spaling proposed by John J. Valenza II and George W. Scherer, the de-icing solution of NaCI andCaCI2 on the concentration of 1%、3%、5% and 7% were frozen into brine ice . Order to obtain the relationship of elastic modulus between the type and concentration of de-icing ,all brine ice specimens were tested under uni-axial compressive loading. The test results show: with the increase of concentration, the elastic modulus and peak stress of bring ice were decreased;when the same concentration ,the elastic modulus and peak stress of NaCl brine ice were higher than CaCI2.Based on the test results ,a reasonable explanation of the following phenomenon were given:The different type of de-icing salt all can lead to salt scaling of concrete;when the concentration of de-icing salt is moderate,it is will occur the most serious salt scaling.
Jianjun Zheng, Xiuli Du, Weiming Yan, Yue Li and Jianwei Zhang
Q. Li and Z. Y. Zhou, "Research on the Effect of Concentration and Type of De-Icing Salt on Concrete Salt-Scaling", Advanced Materials Research, Vols. 450-451, pp. 14-20, 2012