A NEW APPROACH TO EVALUATE CHLORIDE INVADING CHARACTER BASED ON CHLORIDE PROFILES
Chloride diffusion coefficient derived from chloride profiles is an important tool in durability design and lifespan prediction in de-icing salt and marine environments. In different elements, different periods and different environments, the forms and meanings of chloride profiles are different. The manner in fitting of chloride diffusion coefficient is discussed reliance on construction date. The significant variations in chloride ingress that can be observed in a single structure make accurate quantification of remaining service life difficult. It is not reasonable to use the apparent surface concentration as main coefficient to evaluate chloride invading character in drying-wetting cycle environment. An approach using interface of convection zone and diffusion zone as the diffusion surface, and using the chloride concentration in this interface as concentration of diffusion surface is suggested to evaluate invading character of chloride ion and predict lifespan of concrete structure.
Hong Fan Tie-Jun Zhao F.H. Wittmann
Xian University of Architecture and Technology, Xian 710055, P.R. China Qingdao Technological Univer Qingdao Technological University, Qingdao 266033, P.R. China
国际会议
长沙
英文
1037-1042
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）