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Investigation on the effectiveness of the repair method 8.3 “Corrosion protection by increasing the electrical resistivity” in chloride‐containing concrete Part 2: Chloride redistribution in concrete after application of a system sealing surface protective coating
Author(s) -
Celebi Ayhan,
Breit Wolfgang
Publication year - 2020
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.202011545
Subject(s) - redistribution (election) , chloride , corrosion , materials science , coating , humidity , diffusion , saturation (graph theory) , mechanics , thermodynamics , composite material , metallurgy , mathematics , physics , law , combinatorics , politics , political science
This DFG‐funded research project aimed to gain a better understanding of the mechanisms of the W‐Cl repair principle within the framework of fundamental investigations, to contribute to the creation of the necessary basis for a broader application of the repair principle in practice. The focus was on the development of a model to describe the chloride redistribution after the application of a system sealing surface protective coating. On the basis of Fick's second law of diffusion, a mathematical model with a self‐contained analytical solution was developed, with the help of which the chloride redistribution after application of a system sealing surface protective coating can be calculated under the idealized assumption of complete water saturation of the concrete. Furthermore, the influence of the dehydration of the concrete, expected as a result of the application of the repair principle W‐Cl, on the chloride redistribution was investigated. On the basis of laboratory tests and numerical simulations, material‐specific reduction functions were developed to quantify the relationship between the chloride diffusion coefficient and the ambient humidity.