Effect of combined cations on chloride diffusion behavior in concrete

The effect of combined cations in diffusion source solutions on chloride diffusion behavior in concrete is unknown, and present research on the effect of combined cations on chloride diffusion behavior in concrete is insufficient. This paper uses natural diffusion experiment as research condition, and uses the concrete with water-binder ratio of 0.5 as research object to study the effect of chemical valence and combination relationship of cations in combined cations diffusion source solutions on chloride diffusion behavior in concrete. The results reveal that the higher the chemical valence of cations, the faster the chloride diffusion rate. When the combination relationship changes, cations with the same chemical valence have little effect on the chloride diffusion process; cations with different chemical valence have obvious effects on the chloride diffusion process. The higher the concentration of divalent cations in solutions, the lower the water-soluble chloride concentration, and the higher the acid-soluble chloride concentration. Divalent cation is favorable to the formation of Friedel's salt.