Chloride ion diffusion resistance and mechanism of slag concrete
YE Sheng
LU Zhihao
CHEN Lijing
Abstract：The influence of different slag dosages on the compressive strength and chloride ion diffusion coefficient of slag con-crete was studied.The pore structure of concrete was tested using mercury intrusion porosimetry,and the microscopic mechanism of slag concrete's resistance to chloride ion diffusion was analyzed by combining the chloride ion content of slag concrete at different penetration depths.The results showed that the resistance to chloride ion erosion of slag concrete samples with a 40%dosage(W/C=0.3)was significantly improved.Compared with the untreated group,the 30-day compressive strength of the sample increased by ap-proximately 15.9%,while the chloride ion diffusion coefficient and porosity decreased by approximately 32.6%and 16.8%,respectively.The denser microstructure effectively reduces the chloride ion concentration inside the erosion surface,demonstrating a better in-hibitory effect on chloride ion erosion and diffusion.
Keywords：slagconcretechloride ion erosionpore size distributionmicrostructure mechanism
Publication Date：2025-12-25
Online Publishing Date：2026-01-13(First online date of this platform, not the publication date of the document)
Pages：5( 90-93,110 )