冻融对表面防水混凝土钢筋锈蚀的影响  

STUDY THE INFLUENCE OF FREEZE-THAW DAMAGE ON STEEL CORROSION MECHANISM OF WATER REPELLENT TREATMENT ON SURFACE OF CONCRETE

作　　者：陆文攀[1] 赵铁军[1] 郭傲[1] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《低温建筑技术》2015年第1期7-9,共3页Low Temperature Architecture Technology

基　　金：973项目(2009CB623203)

摘　　要：对钢筋混凝土试件表面做硅烷防水处理,经过100次冻融循环及与毛细吸盐120d,通过半电池电位法测定不同冻融循环后、不同吸盐时间后钢筋混凝土试件的半电池电位值,研究冻融环境下表面做硅烷防水处理对试件内部钢筋的锈蚀情况。试验结果表明,在不同冻融损伤下,与未做防水处理的普通混凝土试件相比,做防水处理的混凝土试件具有较好的抗氯离子侵蚀性,当冻融循环次数为100次时,做表面防水处理的混凝土试件最高氯离子浓度为普通试件的3/4左右;表面做防水处理的试件具有较低的半电池电位值,表面涂硅烷减缓了内部钢筋锈蚀速率。Water repellent treatment （WRT） was done to concrete with steel and studied the steel corrosion mechanism in WRT concrete under different freeze-thaw damage, by the means of the 100 times freeze-thaw cycles experiment and 120 days chloride corrosion experiment, the calomel half-cell potential was measured. It showed that the samples treated with WRT performed better on chloride resist- ance penetration than the ordinary samples. When freeze-thaw cycles reached 100 times, the peak chlo- ride ion value of WRT was about three quarters of ordinary sample. WRT had low calomel half-cell potential, which slowed down the corrosion rate of steel

关 键 词：表面防水 冻融损伤 氯离子侵蚀 钢筋锈蚀 

分 类 号：TU528.32[建筑科学—建筑技术科学]