EXPERIMENTAL STUDY ON THE PENETRATION OF CHLORIDE IONS INTO HIGH PERFORMANCE CONCRETE

Using the ASTM C1202 method and the NEL method,the experimental study on the impermeability to chloride ions of high performance concrete was performed,including high performance concrete mixed with only slag and mixed with compound mineral admixture.The correlations between electric flux and chloride diffusion coefficient were discussed.Test result indicated that the mineral admixture can effectively raise the ability to resist chloride ion penetration into high performance concrete.Mixing slag and fly ash especially could more effectively improve the impermebibty to chloride ions of the high performance concrete,and good correlation between electric flux and chloride diffusion coefficient was also showed.When water cement ratio was smaller,the correlation between the two indexes was better.