摘要
阐述了含不同浓度氯盐及亚硝酸盐防冻剂的砂浆,经水化后砂浆孔溶液中各种离子的浓度随着养护时间所发生的变化,并测定埋入钢筋的电极电位、钢筋腐蚀面积率、钢筋腐蚀减量等。实验结果表明:钢筋腐蚀时的电极电位、钢筋腐蚀面积率、钢筋腐蚀减量等性能与砂浆孔溶液中的离子浓度有密切的联系;掺入的NO_2^-浓度越大,硬化砂浆细孔溶液中的NO_2与Cl^-的摩尔比也越大,抑制钢筋腐蚀的效果越明显。
The experimental results are presented on the corrosion of reinforcing steel bars in the pore solutions of harden con-crete mortar with various anti-freezing admixtures with different concentrations of nitrite and chloride. The half-cell potentials, mass loss and corroded area of the reinforcing bars in the corrosion were measured for determination of the relationship between the ion concentration in the pore solution and the inhibition of corrosion. It is indicated that a higher nitrite content is, the high-er molar ratio of NO2-/Cl- is in pore solution, and the effective protection for the bars from corrosion in the mortar will be.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2003年第11期1026-1030,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50078019)
国家留学基金
哈尔滨工业大学交叉学科基金(HIT
MD2001.10)。
关键词
混凝土
钢筋腐蚀
防冻剂
孔溶液
阻锈机理
concrete
steel corrosion
anti-freezing admixture
pore solution
corrosion resistant