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

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DOIResolve DOI: http://doi.org/10.1016/0008-8846(79)90062-0
AuthorSearch for:
TypeArticle
Journal titleCement and Concrete Research
ISSN0008-8846
Volume9
IssueNovember 6
Pages677684; # of pages: 8
Subjecthydrated cement; differential thermal analysis; calcium; hydroxides; Concrete
AbstractDTA 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+H[2]O. In the hydration of C[3]S 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 C[3]S. Hydrated portland cement or C[3]S 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 CaCl[2].
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-869
NRC number17861
3021
NPARC number20375837
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Record identifierb4f191e7-fd90-4d06-97cb-14e97bc82d68
Record created2012-07-23
Record modified2016-05-09
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