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A method based on isothermal calorimetry to quantify the influence of moisture on the hydration rate of young cement pastes

Gerstig, Michael LU and Wadsö, Lars LU (2010) In Cement and Concrete Research 40(6). p.867-874
Abstract
Cement hydration needs water to proceed and if water is lost by drying, the hydration rate will decrease This can be of importance in cases when concrete surfaces are exposed to drying so that their strength development will be retarded We describe a method based on isothermal calorimetry to assess how the rate of cement hydration is influenced by removal of water (drying) at different times up to three days after mixing Thin samples of cement pastes are hydrated in a calorimeter and at different times exposed to one hour drying periods The resulting decrease in thermal power following the removal of water is quantified as a measure of the reduction in hydration rate The mass loss is found by weighing the samples before and after a... (More)
Cement hydration needs water to proceed and if water is lost by drying, the hydration rate will decrease This can be of importance in cases when concrete surfaces are exposed to drying so that their strength development will be retarded We describe a method based on isothermal calorimetry to assess how the rate of cement hydration is influenced by removal of water (drying) at different times up to three days after mixing Thin samples of cement pastes are hydrated in a calorimeter and at different times exposed to one hour drying periods The resulting decrease in thermal power following the removal of water is quantified as a measure of the reduction in hydration rate The mass loss is found by weighing the samples before and after a measurement, and the change in water activity of a sample during drying can be found from the slope of the thermal power during the drying period (C) 2010 Elsevier Ltd All rights reserved (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hydration, Calorimetry, Drying, Kinetics
in
Cement and Concrete Research
volume
40
issue
6
pages
867 - 874
publisher
Elsevier
external identifiers
  • wos:000277901200004
  • scopus:77950859032
ISSN
0008-8846
DOI
10.1016/j.cemconres.2010.02.005
language
English
LU publication?
yes
id
44225736-6227-4d83-b88d-e20cc6f71492 (old id 1617585)
date added to LUP
2010-06-21 13:34:30
date last changed
2018-05-29 10:08:56
@article{44225736-6227-4d83-b88d-e20cc6f71492,
  abstract     = {Cement hydration needs water to proceed and if water is lost by drying, the hydration rate will decrease This can be of importance in cases when concrete surfaces are exposed to drying so that their strength development will be retarded We describe a method based on isothermal calorimetry to assess how the rate of cement hydration is influenced by removal of water (drying) at different times up to three days after mixing Thin samples of cement pastes are hydrated in a calorimeter and at different times exposed to one hour drying periods The resulting decrease in thermal power following the removal of water is quantified as a measure of the reduction in hydration rate The mass loss is found by weighing the samples before and after a measurement, and the change in water activity of a sample during drying can be found from the slope of the thermal power during the drying period (C) 2010 Elsevier Ltd All rights reserved},
  author       = {Gerstig, Michael and Wadsö, Lars},
  issn         = {0008-8846},
  keyword      = {Hydration,Calorimetry,Drying,Kinetics},
  language     = {eng},
  number       = {6},
  pages        = {867--874},
  publisher    = {Elsevier},
  series       = {Cement and Concrete Research},
  title        = {A method based on isothermal calorimetry to quantify the influence of moisture on the hydration rate of young cement pastes},
  url          = {http://dx.doi.org/10.1016/j.cemconres.2010.02.005},
  volume       = {40},
  year         = {2010},
}