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EXPERIMENTAL STUDY ON THE PENETRATION OF CHLORIDE IONS INTO HIGH PERFORMANCE CONCRETE
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摘要: 采用ASTM C1202法及NEL法,对单掺矿渣和复掺粉煤灰、矿渣的高性能混凝土进行抗氯离子渗透性能的试验研究,并探讨电通量与氯离子扩散系数之间的相关性。结果表明:矿物掺合料能有效地改善高性能混凝土的抗氯离子渗透性能,复掺粉煤灰和矿渣比单掺矿渣的效果更佳;电通量与氯离子扩散系数之间具有较好的相关性,当水胶比较小时,两指标间的相关性更好。Abstract: 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.
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