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Fick's 2nd law - Complete solutions for chloride ingress into concrete – with focus on time dependent diffusivity and boundary condition

Frederiksen, Jens M.; Mejlbro, Leif and Nilsson, Lars-Olof LU (2009) In Report TVBM 3146.
Abstract
This report focuses on models of chloride ingress into concrete that are based on mathematical solutions of Fick's second law. In recent years a lot of confusion has been identified concerning these models. In some cases time-dependencies of diffusivity have been used in a mathematically incorrect way. In other cases field and laboratory data from one way of describing the time-dependency of these diffusivities has been used in models that are based on another model. This is now clarified in this report. Some of the clarifications are completely new, concerning the relationship between the age exponents in the time-dependency of the "instantaneous" and the "achieved" diffusivity.
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author
organization
publishing date
type
Book/Report
publication status
published
subject
keywords
mathematical solutions, surface chloride, diffusivity, time-dependent, concrete, chloride, Fick's 2nd law
in
Report TVBM
volume
3146
pages
110 pages
publisher
Division of Building Materials, LTH, Lund University
external identifiers
  • other:TVBM-3146
ISSN
0348-7911
language
English
LU publication?
yes
id
d1af97c4-181f-422e-be0c-5db2dc1cc76a (old id 1514888)
date added to LUP
2009-12-08 08:38:26
date last changed
2016-04-16 01:00:47
@techreport{d1af97c4-181f-422e-be0c-5db2dc1cc76a,
  abstract     = {This report focuses on models of chloride ingress into concrete that are based on mathematical solutions of Fick's second law. In recent years a lot of confusion has been identified concerning these models. In some cases time-dependencies of diffusivity have been used in a mathematically incorrect way. In other cases field and laboratory data from one way of describing the time-dependency of these diffusivities has been used in models that are based on another model. This is now clarified in this report. Some of the clarifications are completely new, concerning the relationship between the age exponents in the time-dependency of the "instantaneous" and the "achieved" diffusivity.},
  author       = {Frederiksen, Jens M. and Mejlbro, Leif and Nilsson, Lars-Olof},
  institution  = {Division of Building Materials, LTH, Lund University},
  issn         = {0348-7911},
  keyword      = {mathematical solutions,surface chloride,diffusivity,time-dependent,concrete,chloride,Fick's 2nd law},
  language     = {eng},
  pages        = {110},
  series       = {Report TVBM},
  title        = {Fick's 2nd law - Complete solutions for chloride ingress into concrete – with focus on time dependent diffusivity and boundary condition},
  volume       = {3146},
  year         = {2009},
}