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Methods to determine hydration states of minerals and cement hydrates

Baquerizo, Luis G.; Matschei, Thomas; Scrivener, Karen L.; Saeidpour, Mahsa LU ; Thorell, Alva LU and Wadsö, Lars LU (2014) In Cement and Concrete Research 65. p.85-95
Abstract
This paper describes a novel approach to the quantitative investigation of the impact of varying relative humidity (RH) and temperature on the structure and thermodynamic properties of salts and crystalline cement hydrates in different hydration states (i.e. varying molar water contents). The multi-method approach developed here is capable of deriving physico-chemical boundary conditions and the thermodynamic properties of hydrated phases, many of which are currently missing from or insufficiently reported in the literature. As an example the approach was applied to monosulfoaluminate, a phase typically found in hydrated cement pastes. New data on the dehydration and rehydration of monosulfoaluminate are presented. Some of the methods used... (More)
This paper describes a novel approach to the quantitative investigation of the impact of varying relative humidity (RH) and temperature on the structure and thermodynamic properties of salts and crystalline cement hydrates in different hydration states (i.e. varying molar water contents). The multi-method approach developed here is capable of deriving physico-chemical boundary conditions and the thermodynamic properties of hydrated phases, many of which are currently missing from or insufficiently reported in the literature. As an example the approach was applied to monosulfoaluminate, a phase typically found in hydrated cement pastes. New data on the dehydration and rehydration of monosulfoaluminate are presented. Some of the methods used were validated with the system Na2SO4-H2O and new data related to the absorption of water by anhydrous sodium sulfate are presented. The methodology and data reported here should permit better modeling of the volume stability of cementitious systems exposed to various different climatic conditions. (C) 2014 Elsevier Ltd. All rights reserved. (Less)
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organization
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Contribution to journal
publication status
published
subject
keywords
Cement hydrates, Monosulfoaluminate, Hydration states, Thermodynamic, properties, Characterization techniques
in
Cement and Concrete Research
volume
65
pages
85 - 95
publisher
Elsevier
external identifiers
  • wos:000342258000011
  • scopus:84907366093
ISSN
0008-8846
DOI
10.1016/j.cemconres.2014.07.009
language
English
LU publication?
yes
id
e0312292-f9d2-4907-9a79-a0ce1ad42e40 (old id 4699613)
date added to LUP
2014-10-23 07:40:03
date last changed
2017-01-01 06:23:20
@article{e0312292-f9d2-4907-9a79-a0ce1ad42e40,
  abstract     = {This paper describes a novel approach to the quantitative investigation of the impact of varying relative humidity (RH) and temperature on the structure and thermodynamic properties of salts and crystalline cement hydrates in different hydration states (i.e. varying molar water contents). The multi-method approach developed here is capable of deriving physico-chemical boundary conditions and the thermodynamic properties of hydrated phases, many of which are currently missing from or insufficiently reported in the literature. As an example the approach was applied to monosulfoaluminate, a phase typically found in hydrated cement pastes. New data on the dehydration and rehydration of monosulfoaluminate are presented. Some of the methods used were validated with the system Na2SO4-H2O and new data related to the absorption of water by anhydrous sodium sulfate are presented. The methodology and data reported here should permit better modeling of the volume stability of cementitious systems exposed to various different climatic conditions. (C) 2014 Elsevier Ltd. All rights reserved.},
  author       = {Baquerizo, Luis G. and Matschei, Thomas and Scrivener, Karen L. and Saeidpour, Mahsa and Thorell, Alva and Wadsö, Lars},
  issn         = {0008-8846},
  keyword      = {Cement hydrates,Monosulfoaluminate,Hydration states,Thermodynamic,properties,Characterization techniques},
  language     = {eng},
  pages        = {85--95},
  publisher    = {Elsevier},
  series       = {Cement and Concrete Research},
  title        = {Methods to determine hydration states of minerals and cement hydrates},
  url          = {http://dx.doi.org/10.1016/j.cemconres.2014.07.009},
  volume       = {65},
  year         = {2014},
}