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Differential thermal method of estimating calcium hydroxide in calcium silicate and cement pastes

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1016/0008-8846(79)90062-0
AuthorSearch for: 1
Affiliation
  1. National Research Council of Canada
FormatText, Article
SubjectConcrete; hydrated cement; differential thermal analysis; calcium; hydroxides
Abstract
DTA is applied to estimate Ca(OH)₂ in cementitious phases by determining the peak areas caused by the decomposition of Ca(OH)₂ to CaO+H₂O. In the hydration of C₃S generally, the chemical method yields slightly higher values. DTA is also used as a monitoring technique in preparing a practically Ca(OH)₂-free product from hydrated portland cement or hydrated C₃S. Hydrated Portland cement or C₃S has now been exposed to an unsaturated Ca(OH)₂ solution and extraction continued until the sample indicate no endothermal peak for Ca(OH)₂. The thermal method permits determination of the rate of formation of Ca(OH)₂ in portland cement hydrated in the presence of 0, 1, 2, and 3.5 per cent CaCl₂.
Publication date
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  • Cement and Concrete Research 9, no. November 6 (1 November 1979): 677–684.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-P-869
NRC numberNRCC 17861
NRC-IRC-3021
NPARC number20375837
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Record identifierb4f191e7-fd90-4d06-97cb-14e97bc82d68
Record created2012-07-23
Record modified2024-03-15
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