Detail publikace

Effect of Cement Kiln Bypass Dust on Properties and Hydration of Akali-Activated Slag Mixtures

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