Effect of different zeolites on conversion-prevention in high alumina cement products

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TypeArticle
Journal titleACI Materials Journal
Volume94
IssueMay/June 3
Pages220226; # of pages: 7
SubjectAdmixtures
AbstractHydration and strength development characteristics of high alumina cement (HAC) containing sodium sulfate and a variety of different zeolites were studied. The zeolites obtained from different sources included different types containing clinoptilolite, chabazite, stilbite, and natrolite. The one-day compressive strength of HAC mortars containing a commercially available zeolite and sodium sulfate was as high as 60 MPQ. No strength reduction occurred in the HAC mortars water-cured at 38 C for 330 days. Hydrogarnet formation was significantly inhibited. Clinoptilolite or chabazite-based zeolites in combination with sodium sulfate were more effective in preventing the formation of hydroganet in HAC paste than stilbite or natrolite-based zeolites. Zeolite alone was not able to prevent the hydrogarnet/formation in the HAC paste. Chabazite was the most effective zeolite in promoting strätlingite formation in the HAC paste.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number39270
5783
NPARC number20375318
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Record identifier120c3bcf-889c-496f-abc2-92deb5b9e2ef
Record created2012-07-23
Record modified2016-05-09
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