海洋环境下混凝土抗冻性和氯离子扩散性的实验与评价方法研究  

Study on Test and Evaluation Methods of Frost-resistance and Chloride Ion Diffusion of Concrete in a Marine Environment

作　　者：杨文武[1,2] 钱觉时[1] 黄煜镔[3] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]大连民族学院土木建筑工程学院,大连116600 [3]重庆大学土木学院,重庆400045

出　　处：《材料导报》2008年第12期74-77,共4页Materials Reports

基　　金：国家自然科学基金资助项目(50702080)

摘　　要：简述了国内外混凝土抗冻性与氯离子扩散性实验与评价方法;对海洋环境下混凝土抗冻性和氯离子扩散性实验及评价方法进行了比较选择。讨论了混凝土冻融与氯离子扩散实验盐溶液浓度存在的问题,通过分析认为冻融介质选择海水或NaCl溶液浓度在0.6～0.8mol/L范围较合理;氯离子扩散试验盐溶液浓度的选择问题有待深入研究,但现阶段最好与冻融介质浓度统一较合适。在分析对比混凝土抗冻性和氯离子扩散实验以及评价方法的基础上,推荐了适合研究海工混凝土抗冻性和氯离子扩散的实验方法。The test and evaluation methods about the frost-resistance and chloride ion diffusion are briefly reviewed. The comparison and selection of them are studied in a marine environment. The problem about salt-solution concentration existing in the test of concrete freezing-thawing cycle and chloride ion diffusion is discussed. Seawater or sodium chloride solution with a concentration of 0. 6-0. 8mol/L is suitable as freezing-thawing medium. The concentration of salt solution for chloride ion diffusion test would better be consistent with freeze thawing medium, which needs further research. After the analysis and comparison of various test and assessment methods about concrete frost resistance and chloride ion diffusion, the appropriate test methods suitable for studying marine concrete are confirmed.

关 键 词：海工混凝土 抗冻性 氯离子扩散 盐溶液浓度 

分 类 号：TU528.33[建筑科学—建筑技术科学]