Detail publikačního výsledku

Rheological properties and microstructure of binary waste red brick powder /metakaolin geopolymer

ROVNANÍK, P.; ROVNANÍKOVÁ, P.; VYŠVAŘIL, M.; GRZESZCZYK, S.; JANOWSKA-RENKAS, E.

Originální název

Rheological properties and microstructure of binary waste red brick powder /metakaolin geopolymer

Anglický název

Rheological properties and microstructure of binary waste red brick powder /metakaolin geopolymer

Druh

Článek WoS

Originální abstrakt

Waste brick powder is a material with sufficient pozzolanic properties to be used as a supplementary cementing material in Portland cement-based concrete or as a precursor for the production of geopolymers. This study aimed to investigate a binary geopolymer system composed of metakaolin (MK), waste red brick (WRB) powder and sodium silicate solution as an alkaline activator. Five different mixtures were prepared where 0, 25, 50, 75, and 100% of the MK was substituted with WRB. The rheological parameters of the fresh pastes were correlated with a structural evaluation of the reaction process. The findings showed that the yield stress of all mixtures was very low, but it increased with time as the geopolymerization reaction proceeded. The more MK was used in the mixture, the faster the yield stress developed. On the other hand, the plastic viscosity strongly depended on the composition of the mixtures and dropped with increasing WRB/MK ratio. The mixtures containing more than 50% MK exhibited a decrease in viscosity with time due to higher reactivity and the faster dissolution of the MK particles.

Anglický abstrakt

Waste brick powder is a material with sufficient pozzolanic properties to be used as a supplementary cementing material in Portland cement-based concrete or as a precursor for the production of geopolymers. This study aimed to investigate a binary geopolymer system composed of metakaolin (MK), waste red brick (WRB) powder and sodium silicate solution as an alkaline activator. Five different mixtures were prepared where 0, 25, 50, 75, and 100% of the MK was substituted with WRB. The rheological parameters of the fresh pastes were correlated with a structural evaluation of the reaction process. The findings showed that the yield stress of all mixtures was very low, but it increased with time as the geopolymerization reaction proceeded. The more MK was used in the mixture, the faster the yield stress developed. On the other hand, the plastic viscosity strongly depended on the composition of the mixtures and dropped with increasing WRB/MK ratio. The mixtures containing more than 50% MK exhibited a decrease in viscosity with time due to higher reactivity and the faster dissolution of the MK particles.

Klíčová slova

waste brick powder; metakaolin; geopolymer; rheology; mechanical properties; IR spectroscopy; NMR spectroscopy

Klíčová slova v angličtině

waste brick powder; metakaolin; geopolymer; rheology; mechanical properties; IR spectroscopy; NMR spectroscopy

Autoři

ROVNANÍK, P.; ROVNANÍKOVÁ, P.; VYŠVAŘIL, M.; GRZESZCZYK, S.; JANOWSKA-RENKAS, E.

Rok RIV

2019

Vydáno

01.09.2018

Nakladatel

Elsevier

Místo

Spojené království Velké Británie a Severního Irska

ISSN

0950-0618

Periodikum

Construction and Building Materials

Svazek

188

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

924

Strany do

933

Strany počet

10

URL

https://www.sciencedirect.com/science/article/pii/S0950061818320907

BibTex

@article{BUT149524,
  author="Pavel {Rovnaník} and Pavla {Rovnaníková} and Martin {Vyšvařil} and Stefania {Grzeszczyk} and Elizbieta {Janowska-Renkas}",
  title="Rheological properties and microstructure of binary waste red brick powder /metakaolin geopolymer",
  journal="Construction and Building Materials",
  year="2018",
  volume="188",
  number="1",
  pages="924--933",
  doi="10.1016/j.conbuildmat.2018.08.150",
  issn="0950-0618",
  url="https://www.sciencedirect.com/science/article/pii/S0950061818320907"
}

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