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COMPARISON AND SELECTION OF METHODS FOR MEASURING THE PERMEABILITY OF CONCRETE
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摘要: 应用透水法、改进快速Cl-渗透法及CH2Cl2浸泡法测定了不同强度等级、不同配合比混凝土试件的渗透性。试验结果表明,透水法未考虑实际工程中混凝土所受的约束作用,其适用性对强度等级的依赖性很强;而改进快速Cl-渗透法和CH2Cl2浸泡法避免了上述缺点,且二者得到的混凝土渗透性结果具有较好的相关性。Abstract: Water penetration test, improved rapid chloride ion penetration test and dichloromethane immersion test were used to measure the permeability of concrete specimens with different strength grades and mixing proportions. The results indicated that restrained effects on the concrete structures in field engineering were not considered in the water penetration test, whose application was strongly dependent upon the strength grade of concrete. The defects mentioned above were avoided in improved rapid chloride ion penetration test and dichloromethane immersion test. Good correlation between the results of improved rapid chloride ion penetration test and dichloromethane immersion test was presented.
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[2] 杨钱荣, 朱蓓蓉. 混凝土渗透性的测试方法及影响因素. 低温筑技术, 2003(5) : 7-10 冯乃谦. 高性能混凝土. 北京: 中国建筑工业出版社, 1996 [3] 易, 谢和平, 孙华飞, 等. 混凝土抗渗性能研究的现状与进展. 混凝土, 2003(2) : 7-12 [4] GBJ 82-85通混凝土长期性能和耐久性能试验方法 [5] AASHTO Designation T277-83. Standard Method of Test for Rapid Determination of the Chloride Permeability of Concrete. ACI Materials Journal, 1997, 94(3) : 257-261 [6] ASTM C1202-91 Standard M ethod of Test for Electrical Indication of Concretec s Ability to Resist Chloride Ion Penetration [7] 刘志国. 混凝土二氯甲烷渗透系数与直流电量相关性研究: [硕士学位论文] . 哈尔滨: 哈尔滨工业大学, 2002 [8] 冯乃谦, 邢. 高性能混凝土的氯离子渗透性和导电量. 混凝土, 2001 (11) : 3-7 [9] 叶金蕊. 约束状态下硬化的混凝土的渗透性研究: [硕士学位论] . 哈尔滨: 哈尔滨工业大学, 2004 [10] 钱觉时. 粉煤灰特征与粉煤灰混凝土. 北京: 科学出版社, 2002 [11] 刘巽伯, 沈且申 , 陈以理, 等. 上海市粉煤机应用技术手册. 上海:同济大学出版社, 1994 -
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