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A sorption balance study of water vapour sorption on anhydrous cement minerals and cement constituents

Dubina, E.; Wadsö, Lars LU and Plank, J. (2011) In Cement and Concrete Research 41(11). p.1196-1204
Abstract
The phenomenon of water vapour sorption by powdered cement constituents exposed to different relative humidities and temperatures was studied. The individual clinker phases C3S, C2S, C(3)A, C(4)AF, calcium sulfates and CaO were tested. Using a water sorption balance, the amount of chemically and physically sorbed water per unit of surface area of the powders and the relative humidity at which water sorption starts to occur on the phases were determined. Various cement clinker phases prehydrate very differently. CaO and C(3)A were found to be most reactive towards water vapour whereas the silicates react less. CaO starts to sorb water at very low RHs and binds it chemically. Beginning at 55% RH, orthorhombic C(3)A also sorbs significant... (More)
The phenomenon of water vapour sorption by powdered cement constituents exposed to different relative humidities and temperatures was studied. The individual clinker phases C3S, C2S, C(3)A, C(4)AF, calcium sulfates and CaO were tested. Using a water sorption balance, the amount of chemically and physically sorbed water per unit of surface area of the powders and the relative humidity at which water sorption starts to occur on the phases were determined. Various cement clinker phases prehydrate very differently. CaO and C(3)A were found to be most reactive towards water vapour whereas the silicates react less. CaO starts to sorb water at very low RHs and binds it chemically. Beginning at 55% RH, orthorhombic C(3)A also sorbs significant amounts of water and binds it chemically and physically. Water sorption of C3S and C2S only begins at 74% RH, and the amount of water sorbed is minor. Calcium sulfates sorb water predominantly physically. (C) 2011 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Prehydration, Humidity, Clinker, Aging, Sulfate
in
Cement and Concrete Research
volume
41
issue
11
pages
1196 - 1204
publisher
Elsevier
external identifiers
  • wos:000295438600013
  • scopus:80052309874
ISSN
0008-8846
DOI
10.1016/j.cemconres.2011.07.009
language
English
LU publication?
yes
id
e96a27ce-7f11-4a86-9520-17e8ab8e489d (old id 2179527)
date added to LUP
2011-10-25 11:22:16
date last changed
2017-11-12 03:34:02
@article{e96a27ce-7f11-4a86-9520-17e8ab8e489d,
  abstract     = {The phenomenon of water vapour sorption by powdered cement constituents exposed to different relative humidities and temperatures was studied. The individual clinker phases C3S, C2S, C(3)A, C(4)AF, calcium sulfates and CaO were tested. Using a water sorption balance, the amount of chemically and physically sorbed water per unit of surface area of the powders and the relative humidity at which water sorption starts to occur on the phases were determined. Various cement clinker phases prehydrate very differently. CaO and C(3)A were found to be most reactive towards water vapour whereas the silicates react less. CaO starts to sorb water at very low RHs and binds it chemically. Beginning at 55% RH, orthorhombic C(3)A also sorbs significant amounts of water and binds it chemically and physically. Water sorption of C3S and C2S only begins at 74% RH, and the amount of water sorbed is minor. Calcium sulfates sorb water predominantly physically. (C) 2011 Elsevier Ltd. All rights reserved.},
  author       = {Dubina, E. and Wadsö, Lars and Plank, J.},
  issn         = {0008-8846},
  keyword      = {Prehydration,Humidity,Clinker,Aging,Sulfate},
  language     = {eng},
  number       = {11},
  pages        = {1196--1204},
  publisher    = {Elsevier},
  series       = {Cement and Concrete Research},
  title        = {A sorption balance study of water vapour sorption on anhydrous cement minerals and cement constituents},
  url          = {http://dx.doi.org/10.1016/j.cemconres.2011.07.009},
  volume       = {41},
  year         = {2011},
}