混凝土冻融损伤对内部钢筋锈蚀影响研究  

Influence of the freeze-thaw damage on the steel corrosion in reinforced concrete

作　　者：赵炜[1] 黄巍林[1,2] 管庭 

机构地区：[1]青岛酒店管理职业技术学院酒店工程学院,山东青岛266000 [2]青岛理工大学土木工程学院,山东青岛266000

出　　处：《混凝土》2016年第6期42-45,共4页Concrete

基　　金：国家自然科学基金(50739001)

摘　　要：为研究混凝土冻融损伤对内部钢筋锈蚀程度和锈蚀速率的影响,开展加速冻融循环试验和加速钢筋锈蚀试验,同时分别用半电池电位和腐蚀电流密度两种电化学方法测定混凝土内部钢筋的锈蚀速率。试验结果表明:冻融损伤对混凝土内部钢筋锈蚀影响较大,钢筋的锈蚀速率随着冻融循环次数和氯离子侵蚀龄期的增加而增加;降低混凝土水灰比和增加混凝土保护层厚度可以有效的提高混凝土内部钢筋的抗锈蚀能力。For studying the influence of freeze-thaw damage on the steel corrosion in reinforced concrete, it carried out the accelerated freeze-thaw cycles test and steel corrosion test.The half-ceU potential and corrosion current density was respectively tested to test the corro- sion rate of steel in reinforced concrete.The results show that the freeze-thaw damage has a great effect on the steel corrosion, and the steel corrosion rate increases with the increase of freeze-thaw cycles and chloride corrosion periods.Decreasing the water-cement ratio or in- creasing the cover thickness is an effective method to improve the resistance to steel corrosion.

关 键 词：冻融损伤 钢筋锈蚀 耐久性 电化学方法 

分 类 号：TU528.01[建筑科学—建筑技术科学]