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Inverse analyses of effective diffusion parameters relevant for a two-phase moisture model of cementitious materials

Addassi, Mouadh; Johannesson, Björn LU and Wadsö, Lars LU (2018) In Cement and Concrete Research 106. p.117-129
Abstract

Here we present an inverse analyses approach to determining the two-phase moisture transport properties relevant to concrete durability modeling. The purposed moisture transport model was based on a continuum approach with two truly separate equations for the liquid and gas phase being connected by the sorption kinetics. The moisture properties of ten binder-systems containing fly ash, calcined clay, burnt shale and gray micro-filler, were investigated experimentally. The experiments used were, (i) sorption test (moisture fixation), (ii) cup test in two different relative humidity intervals, (iii) drying test, and, (iv) capillary suction test. Mass change over time, as obtained from the drying test, the two different cup test intervals... (More)

Here we present an inverse analyses approach to determining the two-phase moisture transport properties relevant to concrete durability modeling. The purposed moisture transport model was based on a continuum approach with two truly separate equations for the liquid and gas phase being connected by the sorption kinetics. The moisture properties of ten binder-systems containing fly ash, calcined clay, burnt shale and gray micro-filler, were investigated experimentally. The experiments used were, (i) sorption test (moisture fixation), (ii) cup test in two different relative humidity intervals, (iii) drying test, and, (iv) capillary suction test. Mass change over time, as obtained from the drying test, the two different cup test intervals and the capillary suction test, was used to obtain the effective diffusion parameters using the proposed inverse analyses approach. The moisture properties obtained with the proposed inverse analyses method provide a good description of the test period for the ten different binder-systems.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cementitious materials (E), Durability (C), Effective diffusion parameters (C), Inverse analyses (B), Moisture transport (C)
in
Cement and Concrete Research
volume
106
pages
13 pages
publisher
Elsevier
external identifiers
  • scopus:85041994156
ISSN
0008-8846
DOI
10.1016/j.cemconres.2018.01.011
language
English
LU publication?
yes
id
6f1a37a9-d612-48ee-8d57-64cd522d96bd
date added to LUP
2018-03-05 14:56:17
date last changed
2018-11-21 21:38:25
@article{6f1a37a9-d612-48ee-8d57-64cd522d96bd,
  abstract     = {<p>Here we present an inverse analyses approach to determining the two-phase moisture transport properties relevant to concrete durability modeling. The purposed moisture transport model was based on a continuum approach with two truly separate equations for the liquid and gas phase being connected by the sorption kinetics. The moisture properties of ten binder-systems containing fly ash, calcined clay, burnt shale and gray micro-filler, were investigated experimentally. The experiments used were, (i) sorption test (moisture fixation), (ii) cup test in two different relative humidity intervals, (iii) drying test, and, (iv) capillary suction test. Mass change over time, as obtained from the drying test, the two different cup test intervals and the capillary suction test, was used to obtain the effective diffusion parameters using the proposed inverse analyses approach. The moisture properties obtained with the proposed inverse analyses method provide a good description of the test period for the ten different binder-systems.</p>},
  author       = {Addassi, Mouadh and Johannesson, Björn and Wadsö, Lars},
  issn         = {0008-8846},
  keyword      = {Cementitious materials (E),Durability (C),Effective diffusion parameters (C),Inverse analyses (B),Moisture transport (C)},
  language     = {eng},
  month        = {04},
  pages        = {117--129},
  publisher    = {Elsevier},
  series       = {Cement and Concrete Research},
  title        = {Inverse analyses of effective diffusion parameters relevant for a two-phase moisture model of cementitious materials},
  url          = {http://dx.doi.org/10.1016/j.cemconres.2018.01.011},
  volume       = {106},
  year         = {2018},
}