Hydrate Phase Assemblages in Calcium Sulfoaluminate - Metakaolin - Limestone Blends

Research output: Contribution to book/anthology/report/proceedingArticle in proceedings

    Malene Thostrup Pedersen, Barbara Lothenbach, Empa-Swiss Federal Laboratories for Materials Science and Technology, SwitzerlandFrank Winnefeld, Empa-Swiss Federal Laboratories for Materials Science and Technology, Switzerland
  • Jørgen Skibsted
The combination of a commercial calcium sulfoaluminate (CSA) cement with metakaolin (MK) and limestone (LS) as supplementary cementitious
materials (SCMs) is investigated for a CSA replacement level of 20 wt%. In
addition to a pure CSA cement, paste samples have been prepared for three blends with MK to LS ratios of MK/(MK + LS) = 0, 0.5 and 1. All blends used a molar gypsum/ye’elimite ratio of 0.5 and a water to binder ratio of w/b = 0.7. The hydration for the four series has been followed from 1 day to 182 days and the hydrate phase assemblages have been identified using XRD, TGA as well as 27Al and 29Si NMR and compared with predictions from thermodynamic modelling. The results show almost full degrees of reaction for ye’elimite in all blends and that the degrees of reaction for belite and MK have an important impact on the hydrate phases and their quantities formed in the ternary systems.
Original languageEnglish
Title of host publicationCalcined Clays for Sustainable Concrete : Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
Number of pages6
Volume16
PublisherSpringer
Publication year5 Dec 2017
Pages352-357
ISBN (print)978-94-024-1206-2
ISBN (Electronic)978-94-024-1207-9
DOIs
StatePublished - 5 Dec 2017
Event2nd International Conference on Calcined Clays for Sustainable Concrete, 2017 - Havana, Cuba
Duration: 5 Dec 20177 Dec 2017

Conference

Conference2nd International Conference on Calcined Clays for Sustainable Concrete, 2017
LandCuba
ByHavana
Periode05/12/201707/12/2017
SeriesRILEM Bookseries
Volume16
ISSN2211-0844

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