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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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[2] 谭志催,李悦.混凝土电通量与氯离子扩散系数关系研究[J].商品混凝土,2008(3):12-14. 易成,郭婷婷,程涛,等. NEL 法与 ASTM C1202法氯离子渗透性对比试验研究[J].混凝土,2007(3):4-6,10. [3] 周剑,张俊芝,周建民,等.混凝土氯离子扩散系数测试方法的对比试验研究[J].工业建筑,2010,40(2):109-111,119. [4] 郭伟,秦鸿根,孙伟,等.外加剂与水胶比对混凝土氯离子渗透性的影响[J].硅酸盐通报,2010(12):1478-1483. [5] ASTM C1202-1994 Standard Test Method for Electrical Indication?of Concrete Ability to Resist Chloride Ion Penetration[S].1994. [6] Lu Xinying. Application of the Nernst-Einstein Equation to?Concrete. Cement and Concrete Research.1997,27(2):293- 302. [7] 赵铁军,周宗辉,迟培云.水胶比?掺合料和龄期对混凝土渗透性的影响[J].混凝土,1998,112(2):19-23. [8] 李淑进.混凝土的渗透性与耐久性研究[D].山东:青岛建筑工程学院,2002. [9] 冯乃谦.高性能混凝土结构[M].北京:机械工业出版社, 2004. [10] 冷发光,冯乃谦.高性能混凝土渗透性和耐久性及评价方法研究[J].低温建筑技术,2000(4):14-16.? -
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