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Moisture transport and sorption in cement based materials containing slag or silica fume

Olsson, Nilla LU ; Nilsson, Lars Olof LU ; Åhs, Magnus LU and Baroghel-Bouny, Véronique (2018) In Cement and Concrete Research 106. p.23-32
Abstract

This paper presents the moisture dependency of moisture transport and moisture fixation in mortars with OPC, slag and silica fume. Water vapor desorption isotherms were measured with gravimetric methods and the moisture dependency of moisture transport was investigated with cup-tests. The results show an ongoing evolution of water vapor desorption isotherms from eight months to four years. The evolution is more pronounced for mortars containing slag. The results also show that there is a significant difference in moisture dependency of the moisture transport properties above 70% relative humidity; some mortars exhibit a clear moisture dependency in moisture transport whereas others do not. At a relative humidity below 70%, the water to... (More)

This paper presents the moisture dependency of moisture transport and moisture fixation in mortars with OPC, slag and silica fume. Water vapor desorption isotherms were measured with gravimetric methods and the moisture dependency of moisture transport was investigated with cup-tests. The results show an ongoing evolution of water vapor desorption isotherms from eight months to four years. The evolution is more pronounced for mortars containing slag. The results also show that there is a significant difference in moisture dependency of the moisture transport properties above 70% relative humidity; some mortars exhibit a clear moisture dependency in moisture transport whereas others do not. At a relative humidity below 70%, the water to binder ratio is more decisive for moisture transport than the type of binder. These results are of value for service-life models, where they represent important input data, and for understanding the evolution of the microstructure at later ages.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Durability (C), Microstructure (B), Modeling (E), Permeability (C), Transport properties (C)
in
Cement and Concrete Research
volume
106
pages
10 pages
publisher
Elsevier
external identifiers
  • scopus:85041551004
ISSN
0008-8846
DOI
10.1016/j.cemconres.2018.01.018
language
English
LU publication?
yes
id
26f0ae45-8843-4ad4-852f-6ebd0f23b73b
date added to LUP
2018-02-20 10:11:35
date last changed
2018-05-29 10:52:13
@article{26f0ae45-8843-4ad4-852f-6ebd0f23b73b,
  abstract     = {<p>This paper presents the moisture dependency of moisture transport and moisture fixation in mortars with OPC, slag and silica fume. Water vapor desorption isotherms were measured with gravimetric methods and the moisture dependency of moisture transport was investigated with cup-tests. The results show an ongoing evolution of water vapor desorption isotherms from eight months to four years. The evolution is more pronounced for mortars containing slag. The results also show that there is a significant difference in moisture dependency of the moisture transport properties above 70% relative humidity; some mortars exhibit a clear moisture dependency in moisture transport whereas others do not. At a relative humidity below 70%, the water to binder ratio is more decisive for moisture transport than the type of binder. These results are of value for service-life models, where they represent important input data, and for understanding the evolution of the microstructure at later ages.</p>},
  author       = {Olsson, Nilla and Nilsson, Lars Olof and Åhs, Magnus and Baroghel-Bouny, Véronique},
  issn         = {0008-8846},
  keyword      = {Durability (C),Microstructure (B),Modeling (E),Permeability (C),Transport properties (C)},
  language     = {eng},
  month        = {04},
  pages        = {23--32},
  publisher    = {Elsevier},
  series       = {Cement and Concrete Research},
  title        = {Moisture transport and sorption in cement based materials containing slag or silica fume},
  url          = {http://dx.doi.org/10.1016/j.cemconres.2018.01.018},
  volume       = {106},
  year         = {2018},
}