INFLUENCES OF OBSTRUCTION ACTION OF REINFORCING BAR ON CHLORIDE DIFFUSION AND CORROSION INITIATION
Chloride-induced corrosion of reinforcing steel causes reinforced concrete structures performance deterioration over time in marine environment.Few researches concern the influences of obstruction action of reinforcing bar on chloride diffusivity in concrete and the prediction results about corrosion initiation or service life may be non-conservative.In this paper,the influencing factors of chloride diffusion coefficient and chloride binding isotherms in concrete are reviewed comprehensively.The two-dimensional FEM models considering insulation boundary of bar for chloride diffusion are built.Chloride concentration field and contour at corner of square cross-section and in front of reinforcing bar are present.Finally,the influences of boundary conditions,c/d (concrete cover to reinforcing bar diameter ratio) and obstruction action of reinforcing bars on corrosion initiation predictions are discussed thoroughly.
Chloride diffusion corrosion service life obstruction action binding isotherm
Chengming Lan Jie Yuan Hui Li
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, P.R Research Cener of Structural Monitoring and Control, School of Civil Engineering, Harbin Institute o
国际会议
The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)
武汉
英文
254-260
2012-11-17(万方平台首次上网日期,不代表论文的发表时间)