Hydrate Phase Assemblages in Calcium Sulfoaluminate - Metakaolin - Limestone Blends

Publikation: Bidrag til bog/antologi/rapport/proceedingKonferencebidrag i proceedings

    Malene Thostrup Pedersen, Barbara Lothenbach, Empa-Swiss Federal Laboratories for Materials Science and Technology, SchweizFrank Winnefeld, Empa-Swiss Federal Laboratories for Materials Science and Technology, Schweiz
  • 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.
OriginalsprogEngelsk
TitelCalcined Clays for Sustainable Concrete : Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
Antal sider6
Vol/bind16
ForlagSpringer
Udgivelsesår5 dec. 2017
Sider352-357
ISBN (trykt)978-94-024-1206-2
ISBN (Elektronisk)978-94-024-1207-9
DOI
StatusUdgivet - 5 dec. 2017
Begivenhed2nd International Conference on Calcined Clays for Sustainable Concrete, 2017 - Havana, Cuba
Varighed: 5 dec. 20177 dec. 2017

Konference

Konference2nd International Conference on Calcined Clays for Sustainable Concrete, 2017
LandCuba
ByHavana
Periode05/12/201707/12/2017
SerietitelRILEM Bookseries
Vol/bind16
ISSN2211-0844

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