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A theoretical model describing diffusion of a mixture of different types of ions in pore solution of concrete coupled to moisture transport

Johannesson, Björn LU (2003) In Cement and Concrete Research 33(4). p.481-488
Abstract
A theoretical model is established for diffusion of different types of ions in pore solution of concrete and the coupling to moisture flow and moisture content. Mass exchanges between ions in pore solution and solid hydration products in the concrete are also considered. The basic concepts behind the so-called mixture theory are used. The development of a mass balance principle for ions in pore solution is established. This principle accounts for (i) diffusion caused by concentration gradients of ions and gradients of the so-called internal electrical potential, (ii) convection, i.e. the effect on the motion of ions due to a motion of the pore solution in concrete, (iii) the effect on the concentration due to changes in the moisture... (More)
A theoretical model is established for diffusion of different types of ions in pore solution of concrete and the coupling to moisture flow and moisture content. Mass exchanges between ions in pore solution and solid hydration products in the concrete are also considered. The basic concepts behind the so-called mixture theory are used. The development of a mass balance principle for ions in pore solution is established. This principle accounts for (i) diffusion caused by concentration gradients of ions and gradients of the so-called internal electrical potential, (ii) convection, i.e. the effect on the motion of ions due to a motion of the pore solution in concrete, (iii) the effect on the concentration due to changes in the moisture content, and finally, (iv) the effect of mass exchange of ions between solid hydration products and the bore solution phase. The model is general in the sense that all different types of ions appearing in pore solution phase can-be included and computed for during quite arbitrary boundary conditions. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
moisture transport, pore solution, diffusion, ions
in
Cement and Concrete Research
volume
33
issue
4
pages
481 - 488
publisher
Elsevier
external identifiers
  • wos:000181576000003
  • scopus:0037399739
ISSN
0008-8846
language
English
LU publication?
yes
id
287b1da4-4721-4c22-8d9d-eb0da5af5a04 (old id 316304)
date added to LUP
2007-08-03 11:21:11
date last changed
2018-05-29 12:23:14
@article{287b1da4-4721-4c22-8d9d-eb0da5af5a04,
  abstract     = {A theoretical model is established for diffusion of different types of ions in pore solution of concrete and the coupling to moisture flow and moisture content. Mass exchanges between ions in pore solution and solid hydration products in the concrete are also considered. The basic concepts behind the so-called mixture theory are used. The development of a mass balance principle for ions in pore solution is established. This principle accounts for (i) diffusion caused by concentration gradients of ions and gradients of the so-called internal electrical potential, (ii) convection, i.e. the effect on the motion of ions due to a motion of the pore solution in concrete, (iii) the effect on the concentration due to changes in the moisture content, and finally, (iv) the effect of mass exchange of ions between solid hydration products and the bore solution phase. The model is general in the sense that all different types of ions appearing in pore solution phase can-be included and computed for during quite arbitrary boundary conditions.},
  author       = {Johannesson, Björn},
  issn         = {0008-8846},
  keyword      = {moisture transport,pore solution,diffusion,ions},
  language     = {eng},
  number       = {4},
  pages        = {481--488},
  publisher    = {Elsevier},
  series       = {Cement and Concrete Research},
  title        = {A theoretical model describing diffusion of a mixture of different types of ions in pore solution of concrete coupled to moisture transport},
  volume       = {33},
  year         = {2003},
}