冻融环境下表面防水混凝土中钢筋锈蚀机理研究  

Study on steel corrosion mechanism of water repellent treatment on surface of concrete under freezing-thawing environment

作　　者：李昊翼[1,2] 马志鸣[2] 管庭 徐建光[2] 

机构地区：[1]山东省建筑科学研究院,山东济南250031 [2]青岛理工大学土木工程学院,山东青岛266033

出　　处：《混凝土》2015年第3期50-53,共4页Concrete

基　　金：973项目(2009CB623203)

摘　　要：对带钢筋混凝土试件进行硅烷防水处理,通过100次冻融循环试验及100 d氯离子侵蚀试验,同时利用半电池电位法测定不同冻融损伤、不同氯离子侵蚀龄期下试件半电池电位值,定量研究冻融环境下表面防水对试件内部钢筋锈蚀的情况。试验结果表明,在不同冻融损伤下表面防水试件较普通混凝土试件具有较好抗水渗透性和抗氯离子渗透性,当冻融循环次数为100次时,表面防水试件的毛细吸收总量和最高氯离子浓度约为普通试件的1/3和2/3;且表面防水试件具有较低的半电池电位值,减缓了内部钢筋锈蚀速率。Water repellent treatment to concrete with steel and study the steel corrosion mechanism in water repellent treatment concrete under different freezing - thawing environment, which by the means of the 100 times freezing - thawing cycles experiment, 100 days chloride corrosion experiment and test the calomel half - cell potential.The results show that the water repellent treatment have a good performance on water and chloride resistance penetration compared with ordinary sample.When cycles reach 100 times the water absorp- tion capacity of water repellent treatment about one - third as ordinary sample, the peak chloride ion concentration of water repellent treatment about two - third as ordinary sample. Water repellent treatment have low calomel half - cell potential, which slow down the corrosion rate of steel in concrete.

关 键 词：表面防水 冻融损伤 渗透性 钢筋锈蚀 

分 类 号：TU528.01[建筑科学—建筑技术科学]