Experimental Study on the Concrete Performance Corroded by Different Salts under the Condition of Freezing-Thawing Cycles

Abstract

The destructive effect of salt corrosion on concrete has attracted wide attention of civil engineering scholars nowadays. The west area in Jilin province is not only the typical frost soil region, but also is the most serious area with saline soil. In such environment damage of structural engineering often occurs under the action of freeze-thaw cycles and salt corrosion due to the lack of concrete durability. In this article Da’an city in Jilin is selected to be as the research area, and the physical and chemical properties of soil samples in spring are analyzed, the results indicate that the component of soluble salt in soil mainly includes Na⁺, HCO₃^-, Cl^-, and SO₄², and small amount of Mg²⁺, Ca²⁺, K⁺, and so on. In order to study the influence of different soluble salts on concrete durability under the condition of freeze-thaw cycles, quick freeze-thaw cycling tests on concrete durability are conducted respectively in sulfate, chloride and bicarbonate solution. Then the characteristics and laws of concrete corrosion damage under freeze-thaw cycles and salt corrosion damage are summarized.