NDLI: Coupled diffusion of chloride and other ions in saturated concrete

Content Provider	Springer Nature Link
Author	Damrongwiriyanupap, Nattapong Li, Linyuan Xi, Yunping
Copyright Year	2011
Abstract	Corrosion of reinforcing steel due to chloride ions is one of the severe deterioration problems in longterm performance of reinforced concrete structures. The deterioration process is frequently found in marine concrete structures, highway pavements, and bridges exposed to deicing salts. The diffusion of chloride ions is associated and strongly affected by other ions in the pore solution in concrete. In this paper, chloride penetration into concrete structures was mathematically characterized by the Nernst-Planck equation which considered not only diffusion mechanism of the chloride ions but also ionic interaction among other ions coming from externally applied deicers and within the Portland cement paste. Electroneutrality was used to determine the electrostatic potential induced by the ionic interaction. The material models of chloride binding capacity and chloride diffusion coefficient were incorporated in the governing equations. The governing equations were solved by using finite element method. A numerical example was used to illustrate the coupling effect of multi-ionic interactions and the effect of influential parameters. The numerical results obtained from the present model agreed very well with available test data.
Starting Page	267
Ending Page	277
Page Count	11
File Format	PDF
ISSN	16737407
Journal	Frontiers of Architecture and Civil Engineering in China
Volume Number	5
Issue Number	3
e-ISSN	16737512
Language	English
Publisher	SP Higher Education Press
Publisher Date	2011-09-11
Publisher Institution	Chinese Universities
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	diffusion chloride concrete Nernst-Planck equation durability Cities, Countries, Regions Civil Engineering
Content Type	Text
Resource Type	Article
Subject	Architecture Civil and Structural Engineering

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