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BÍLEK Jr., V. KALINA, L. NOVOTNÝ, R. MÁSILKO, J. ŠOUKAL, F.
Originální název
Effect of Cement Kiln Bypass Dust on Properties and Hydration of Akali-Activated Slag Mixtures
Typ
článek ve sborníku mimo WoS a Scopus
Jazyk
angličtina
Originální abstrakt
During recent decades, alkali-activated slag (AAS) systems have attracted great scientific interest around the world. Despite many efforts its severe shrinkage and cracking is still a delicate issue. The aim of this work was to partially replace slag by cement kiln bypass dust (CBPD) which, on the basis of its mineralogical composition, would act as an expansive agent (EA) and thus compensate AAS shrinkage. It was observed that volume changes of AAS/CBPD mixtures strongly depended on CBPD dose since low slag replacement levels did not significantly reduce autogenous shrinkage while around 50% of CBPD or more led to severe expansion. Based on X-ray diffraction, this expansion is related to hydrocalumite-type phase formation. The presence of CBPD also totally modified calorimetric response of AAS pastes.
Klíčová slova
Cement kiln bypass dust; alkaline activation; hydration; calorimetry; X-ray diffraction; volume change
Autoři
BÍLEK Jr., V.; KALINA, L.; NOVOTNÝ, R.; MÁSILKO, J.; ŠOUKAL, F.
Vydáno
16. 9. 2019
Nakladatel
Research Institute of Binding Materials Prague
Místo
Prague
ISSN
2523-935X
Periodikum
5th International Congress on the Chemistry of Cement (ICCC 2019) Congress proceedings – Papers and Posters Proceedings
Stát
Česká republika
Strany od
–
Strany do
Strany počet
9