Hydration of gypsum plaster by the compact technique

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TypeArticle
Journal titleAmerican Ceramic Society Bulletin
ISSN0002-7812
Volume44
Issue2
Pages151155; # of pages: 5
Subjecthydration; gypsum plaster; expansion; temperature; Concrete; hydratation; platre; dilatation; temperature
AbstractA new method is described for following the hydration reaction of gypsum plaster (hemihydrate). It involves the measurement of the length change of a compact of unhydrated material when it is exposed to water in the liquid or vapor phase. Advantages of this method over previous methods are discussed and evidence presented to demonstrate them. By the compact technique unhydrated particles can be brought very close together, resulting in a very large decrease in the rate of hydration and an increase in the apparent volume expansion accompanying the hydration. These effects can be used to advantage in studying the mechanism of the reaction. This work also shows the effect of temperature upon the expansion due to hydration.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-RP-256
NRC number8528
3061
NPARC number20375297
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Record identifier65562e62-49a2-4a58-b994-7fb94195c3f0
Record created2012-07-23
Record modified2016-05-09
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