Hydration characteristics of monocalcium aluminate at a low water-solid ration

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DOIResolve DOI: http://doi.org/10.1016/0008-8846(73)90008-2
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TypeArticle
Journal titleCement and Concrete Research
ISSN0008-8846
Volume3
IssueNovember 6
Pages729750; # of pages: 22
Subjectaluminate cement; hydration; calcium; expansion; shrinkage; Concrete; ciment alumineux; hydratation; calcium; dilatation; retrait (alteration)
AbstractThe hydration characteristics of calcium monoaluminate were studied using an effective water/aluminate ratio of 0.15 at 20 degrees or 80 degrees C, from a few minutes to two months. The material hydrated at 80 degrees C shows a large shrinkage while at the lower temperature a continuous expansion occurs. The product at 80 degrees C shows a much higher strength than that hydrated at 20 degrees C. The main initial hydration products are 2CaO, Al[2]O[3], 8H[2]O and alumina gel. Microcracks are developed in the products hydrated at 20 degrees C while at the higher temperature a very compact mass results. The data indicate that it is possible to obtain a durable high alumina cement by using a low water/cement ratio and hydrating at higher temperatures, and under these conditions C[3]AH[6] - C[3]AH[6] bond is favoured.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-RP-572
NRC number13448
3002
NPARC number20375405
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Record identifier17f2734f-a383-4d96-9fe7-d60faae5366a
Record created2012-07-23
Record modified2016-05-09
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