Investigation of Chloride Diffusion into Concrete with Joint

Abstract

The passive layer shielding the steel reinforcement from corrosion can be attacked by the chloride ions that permeate through the chloride ions that permeate through the pores in the concrete when it is in solution. This paper aims to explore the investigation of chloride diffusion into concrete with joint. Three exposure conditions were taken into consideration in chloride ion diffusion experiments in order to examine the impact of exposure conditions on the chloride ion diffusion property: long-term immersion in a static sodium chloride solution, long-term immersion in a circulating sodium chloride solution, and dry–wet cycles in a circulating sodium chloride solution. According to experimental findings, the age of erosion increased the chloride ion content at a particular depth. Furthermore, concrete subjected to dry-wet cycles of the circulating sodium chloride solution had slightly higher chloride ion content than concrete immersed in the solution for an extended period of time. Fick's second law served as the foundation for the empirical equations that were developed by fitting experimental data to determine the chloride content and diffusion coefficient at the concrete's surface, as well as the correlation coefficient values for various exposure scenarios. The calculation formula's greater applicability was confirmed by comparison with the experiment results. The chloride ion content could be predicted and examined using this method for various exposure scenarios.