Publication detail

Quaternary Ammonium and Pyridinium Salts as Modifiers of the Rheological Properties of Geopolymer Pastes

ROVNANÍK, P. ŽIŽLAVSKÝ, T.

Original Title

Quaternary Ammonium and Pyridinium Salts as Modifiers of the Rheological Properties of Geopolymer Pastes

Type

conference paper

Language

English

Original Abstract

The study investigates the impact of quaternary ammonium and pyridinium salts on the rheological properties of metakaolin-based geopolymer pastes, with a focus on their application in 3D printing technology The experimental results demonstrated that the addition of these salts increased both the plastic viscosity and yield stress of the geopolymer mixtures, with the effect intensifying with higher concentrations and longer aliphatic chains. The coefficient of consistency derived from Herschel-Bulkley model increased from 1.78 up to 3.83 Pa·sn and the yield stress rose from 3.4 up to 31.8 Pa. The study also observed a shift from shear-thickening to shear-thinning behaviour and reduction in thixotropic properties with increased dosages of the admixtures, which is beneficial for 3D printing. The mechanical properties of modified geopolymer mortars were also tested and the results revealed quite negligible effect of admixtures on flexural strength. The compressive strength was slightly reduced by up to 12%. The findings suggest that these admixtures are effective in modifying the rheological properties of geopolymers, making them more suitable for advanced applications like 3D printing.

Keywords

Geopolymer; Metakaolin; Admixture; Quaternary Ammonium; Pyridinium; Rheology

Authors

ROVNANÍK, P.; ŽIŽLAVSKÝ, T.

Released

15. 1. 2025

Publisher

Trans Tech Publication

Location

Švýcarsko

ISBN

1662-8969

Periodical

Advances in Science and Technology

Year of study

159

State

Swiss Confederation

Pages from

3

Pages to

11

Pages count

9

URL

https://www.scientific.net/AST.159.3

BibTex

@inproceedings{BUT194150,
  author="Pavel {Rovnaník} and Tomáš {Žižlavský}",
  title="Quaternary Ammonium and Pyridinium Salts as Modifiers of the Rheological Properties of Geopolymer Pastes",
  booktitle="10th Int. Conf. on Architecture, Materials and Construction (ICAMC) & 5th Int. Conf. on Building Science, Technology and Sustainability (ICBSTS)",
  year="2025",
  journal="Advances in Science and Technology",
  volume="159",
  pages="3--11",
  publisher="Trans Tech Publication",
  address="Švýcarsko",
  doi="10.4028/p-9ynO8C",
  issn="1662-8969",
  url="https://www.scientific.net/AST.159.3"
}