Strength of C3A paste containing gypsum and CaCI2

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Journal titleCement and Concrete Research
IssueJuly 4
Pages461474; # of pages: 14
Subjecthydrated cement; additives; gypsum; mechanical properties; hardness; Concrete; ciment hydrate; additif (agent); gypse; propriete mecanique; durete
AbstractA study has been made of the strength of 3CaO.Al[2]O[3] and 3CaO.Al[2]O[3] + gypsum pastes as well as of the influence of the admixture CaCl[2] on these pastes. The methods employed were microhardness indentation and cone penetration. With 16 per cent CaCl[2] added to the 3CaO.Al[ 2]O[3] paste a significant gain in strength was obtained after 3 months, while an 8 per cent CaCl[2] addition to the 3CaO.Al[2]O[3] + gypsum system gave the highest strength at the same age. Morphological changes in the pastes were found to be related to changes in hardness. From a comparison of the two methods it was concluded that cone penetration measurements are useful up to a certain hardness level.
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number15337
NPARC number20374270
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Record identifiere179f2ff-aaed-4287-9405-f72de2eca27a
Record created2012-07-23
Record modified2016-05-09
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