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Development of pore structure, moisture sorption and transport properties in fly ash blended cement-based materials

Linderoth, O. LU ; Johansson, P. LU and Wadsö, L. LU (2020) In Construction and Building Materials 261.
Abstract

This study documents how the pore structure develops with time in cement-based materials with varying fly ash replacement. Heat production was measured during the first days, water vapour desorption isotherms were determined at different times up to 18 months, and moisture transport properties were measured after one year. Long-term fly ash reactions alter the pore structure considerably. The fly ash does not fill pore volume but refines porosity. After one year, fly ash replacement resulted in a factor 2–5 lower moisture diffusion coefficients. Aggregates have little effect on the measured pore structure; sorption isotherms for mortar and concrete can be determined on cement paste.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Durability, Moisture transport, Permeability, Pore structure, SCM, Sorption
in
Construction and Building Materials
volume
261
article number
120007
publisher
Elsevier
external identifiers
  • scopus:85087757912
ISSN
0950-0618
DOI
10.1016/j.conbuildmat.2020.120007
project
Hydration, pore structure, and related moisture properties of fly ash blended cement-based materials
language
English
LU publication?
yes
id
98ca66b7-46c7-4e62-9c0c-6e67186c21a7
date added to LUP
2020-07-21 13:09:20
date last changed
2020-09-07 08:50:16
@article{98ca66b7-46c7-4e62-9c0c-6e67186c21a7,
  abstract     = {<p>This study documents how the pore structure develops with time in cement-based materials with varying fly ash replacement. Heat production was measured during the first days, water vapour desorption isotherms were determined at different times up to 18 months, and moisture transport properties were measured after one year. Long-term fly ash reactions alter the pore structure considerably. The fly ash does not fill pore volume but refines porosity. After one year, fly ash replacement resulted in a factor 2–5 lower moisture diffusion coefficients. Aggregates have little effect on the measured pore structure; sorption isotherms for mortar and concrete can be determined on cement paste.</p>},
  author       = {Linderoth, O. and Johansson, P. and Wadsö, L.},
  issn         = {0950-0618},
  language     = {eng},
  publisher    = {Elsevier},
  series       = {Construction and Building Materials},
  title        = {Development of pore structure, moisture sorption and transport properties in fly ash blended cement-based materials},
  url          = {http://dx.doi.org/10.1016/j.conbuildmat.2020.120007},
  doi          = {10.1016/j.conbuildmat.2020.120007},
  volume       = {261},
  year         = {2020},
}