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Strätlingite formation in high alumina cement-zeolite systems

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
SubjectAdmixtures
Abstract
Reaction mechanisms of strätlingite formation in high alumina cement (HAC)-zeolite systems were studied. A component separation method that made it possible to study individual reactions involving hydrated HAC and zeolite was employed. Different sodium salts, e.g. sodiumsilicate, sodium carbonate, sodium sulphate and sodium nitrate, were used to promote strätlingite formation in the HAC paste. Strätlingite forms preferentially to the cubic hydrogarnet phase in hydrated HAC systems in the presence of zeolite. A sufficiently high silicate concentration, arising from the dissolution of silicabearing materials such as zeolite, is required. A high pH environment is also conducive to strätlingite formation. The thermochemical stability of CAHlO, the normal precursor to hydrogarnet formation, is apparently increased under the condition of high microsilica content.
Publication date
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  • Advances in Cement Research 7, no. 28 (1 October 1995): 171–178.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 38798
NRC-IRC-5615
NPARC number20375692
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Record identifier9dcb153f-15fa-4310-b494-67b2281e6034
Record created2012-07-23
Record modified2020-04-29
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