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Moisture equilibrium of cement based materials containing slag or silica fume and exposed to repeated sorption cycles

Saeidpour, Mahsa LU and Wadsö, Lars LU (2015) In Cement and Concrete Research 69. p.88-95
Abstract
Water vapor sorption isotherms are essential data in models to predict the service life of cement based structures. This study investigates the influence of water to binder ratio (0.4, 0.5 and 0.6), and the presence of two SCMs (70% slag and 10% silica fume) on sorption isotherms, both in the hygroscopic and in the super-hygroscopic relative humidity (RH) ranges. In the present paper desorption isotherms are divided into different parts based on the Jennings CM-II model of the C-S-H structure. The samples with silica fume and slag have higher moisture content than OPC samples, but with a higher amount of gel pores and lower amount of capillary pores. At low RHs all samples have similar desorption curves and the introduction of SCMs induces... (More)
Water vapor sorption isotherms are essential data in models to predict the service life of cement based structures. This study investigates the influence of water to binder ratio (0.4, 0.5 and 0.6), and the presence of two SCMs (70% slag and 10% silica fume) on sorption isotherms, both in the hygroscopic and in the super-hygroscopic relative humidity (RH) ranges. In the present paper desorption isotherms are divided into different parts based on the Jennings CM-II model of the C-S-H structure. The samples with silica fume and slag have higher moisture content than OPC samples, but with a higher amount of gel pores and lower amount of capillary pores. At low RHs all samples have similar desorption curves and the introduction of SCMs induces only a slight increase in the BET surface area. (C) 2014 Elsevier Ltd. All rights reserved. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Adsorption (C), Cycles (C), Supplementary cementitious materials (SCMs), (D)
in
Cement and Concrete Research
volume
69
pages
88 - 95
publisher
Elsevier
external identifiers
  • wos:000349726000009
  • scopus:84920648646
ISSN
0008-8846
DOI
10.1016/j.cemconres.2014.12.005
language
English
LU publication?
yes
id
590e8dea-e623-4908-b114-0fadd171c12c (old id 5160102)
date added to LUP
2015-03-25 08:03:31
date last changed
2017-02-12 03:58:27
@article{590e8dea-e623-4908-b114-0fadd171c12c,
  abstract     = {Water vapor sorption isotherms are essential data in models to predict the service life of cement based structures. This study investigates the influence of water to binder ratio (0.4, 0.5 and 0.6), and the presence of two SCMs (70% slag and 10% silica fume) on sorption isotherms, both in the hygroscopic and in the super-hygroscopic relative humidity (RH) ranges. In the present paper desorption isotherms are divided into different parts based on the Jennings CM-II model of the C-S-H structure. The samples with silica fume and slag have higher moisture content than OPC samples, but with a higher amount of gel pores and lower amount of capillary pores. At low RHs all samples have similar desorption curves and the introduction of SCMs induces only a slight increase in the BET surface area. (C) 2014 Elsevier Ltd. All rights reserved.},
  author       = {Saeidpour, Mahsa and Wadsö, Lars},
  issn         = {0008-8846},
  keyword      = {Adsorption (C),Cycles (C),Supplementary cementitious materials (SCMs),(D)},
  language     = {eng},
  pages        = {88--95},
  publisher    = {Elsevier},
  series       = {Cement and Concrete Research},
  title        = {Moisture equilibrium of cement based materials containing slag or silica fume and exposed to repeated sorption cycles},
  url          = {http://dx.doi.org/10.1016/j.cemconres.2014.12.005},
  volume       = {69},
  year         = {2015},
}