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Investigation of the products of the dolomite reaction in Portland cement pastes

Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje
Chapter, Conference object, Peer reviewed
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URI
http://hdl.handle.net/11250/2475687
Date
2017
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  • Institutt for konstruksjonsteknikk [1569]
  • Publikasjoner fra CRIStin - NTNU [19694]
Original version
Nordic Concrete Research. 2017, Proceedings of the XXIII Nordic Concrete Research Symposium, Part 1, 15-18.  
Abstract
The formation of potentially deleterious reaction products from the reaction of dolomite fines in Portland cement pastes was investigated. It was shown that the reaction of dolomite fines did not follow the commonly accepted dedolomitization reaction. Instead, similar hydration phases as reported for the Portland cement containing limestone are observed, with the exception that also hydrotalcite is formed. It was shown with SEM-EDS and XRD that hydrotalcite is the only magnesium containing hydration product of the dolomite reaction, as no brucite or M-S-H were detected. In the next step of this study this reaction will be investigated in Al-rich systems.
Publisher
Norsk Betongforening
Journal
Nordic Concrete Research

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