Publication detail

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.

Original Title

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

English Title

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

Language

en

Original Abstract

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.

English abstract

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.

Keywords

Cement kiln bypass dust; alkaline activation; hydration; calorimetry; X-ray diffraction; volume change

Released

16.09.2019

Publisher

Research Institute of Binding Materials Prague

Location

Prague

ISBN

2523-935X

Periodical

5th International Congress on the Chemistry of Cement (ICCC 2019) Congress proceedings – Papers and Posters Proceedings

State

CZ

Pages from

Pages to

Pages count

9

Documents

BibTex


@inproceedings{BUT160113,
  author="Vlastimil {Bílek} and Lukáš {Kalina} and Radoslav {Novotný} and Jiří {Másilko} and František {Šoukal}",
  title="Effect of Cement Kiln Bypass Dust on Properties and Hydration of Akali-Activated Slag Mixtures",
  annote="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.",
  address="Research Institute of Binding Materials Prague",
  booktitle="PAPERS AND POSTERS PROCEEDINGS: 15th International Congress on the Chemistry of Cement",
  chapter="160113",
  howpublished="online",
  institution="Research Institute of Binding Materials Prague",
  year="2019",
  month="september",
  pages="–--–",
  publisher="Research Institute of Binding Materials Prague"
}