Detail publikačního výsledku

Rheological Properties of Alkali-Activated Brick Powder Based Pastes: Effect of Alkali Activator and Silicate Modulus

VYŠVAŘIL, M.; ROVNANÍKOVÁ, P.; KEPPERT, M.

Originální název

Rheological Properties of Alkali-Activated Brick Powder Based Pastes: Effect of Alkali Activator and Silicate Modulus

Anglický název

Rheological Properties of Alkali-Activated Brick Powder Based Pastes: Effect of Alkali Activator and Silicate Modulus

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

The rheological behaviour of alkali-activated materials prepared by activation of a brick powder by alkaline solution (alkali + water glass) is described. The influence of the composition of activation solution (NaOH vs. KOH, varied silicate modulus) on the flow properties (yield stress, consistency coefficient, fluidity index) and the evolution of the elastic modulus (G´) and the viscous modulus (G″) over time were studied. The results show that the pastes are thixotropic suspensions with very low yield stress. The potassium activator decreases the yield stress and viscosity of the pastes and retards the polymerization kinetics. The brick pastes become more rigid and more viscous with increasing silicate modulus. This also leads to an acceleration of gel formation in brick pastes.

Anglický abstrakt

The rheological behaviour of alkali-activated materials prepared by activation of a brick powder by alkaline solution (alkali + water glass) is described. The influence of the composition of activation solution (NaOH vs. KOH, varied silicate modulus) on the flow properties (yield stress, consistency coefficient, fluidity index) and the evolution of the elastic modulus (G´) and the viscous modulus (G″) over time were studied. The results show that the pastes are thixotropic suspensions with very low yield stress. The potassium activator decreases the yield stress and viscosity of the pastes and retards the polymerization kinetics. The brick pastes become more rigid and more viscous with increasing silicate modulus. This also leads to an acceleration of gel formation in brick pastes.

Klíčová slova

brick powder, alkali activator, silicate modulus, rheology, oscillation, yield stress, dynamic moduli

Klíčová slova v angličtině

brick powder, alkali activator, silicate modulus, rheology, oscillation, yield stress, dynamic moduli

Autoři

VYŠVAŘIL, M.; ROVNANÍKOVÁ, P.; KEPPERT, M.

Rok RIV

2019

Vydáno

20.06.2018

ISBN

978-3-0357-1348-0

Kniha

Binders, Materials and Technologies in Modern Construction IV

ISSN

1662-9779

Periodikum

Solid State Phenomena

Svazek

2018

Číslo

276

Stát

Švýcarská konfederace

Strany od

185

Strany do

191

Strany počet

7

BibTex

@inproceedings{BUT148511,
  author="Martin {Vyšvařil} and Pavla {Rovnaníková} and Martin {Keppert}",
  title="Rheological Properties of Alkali-Activated Brick Powder Based Pastes: Effect of Alkali Activator and Silicate Modulus",
  booktitle="Binders, Materials and Technologies in Modern Construction IV",
  year="2018",
  journal="Solid State Phenomena",
  volume="2018",
  number="276",
  pages="185--191",
  doi="10.4028/www.scientific.net/SSP.276.185",
  isbn="978-3-0357-1348-0",
  issn="1012-0394"
}