Publication detail

On the action mechanism of lignosulfonate plasticizer in alkali-activated slag-based system

KALINA, L. BÍLEK, V. HRUBÝ, P. ILIUSHCHENKO, V. KALINA, M. SMILEK, J.

Original Title

On the action mechanism of lignosulfonate plasticizer in alkali-activated slag-based system

Type

journal article in Web of Science

Language

English

Original Abstract

Workability improvement of alkali-activated materials by common plasticizers used for ordinary Portland cement is usually an issue, but certain effectiveness is often found for lignosulfonate-based plasticizers (LS), especially for activation with sodium hydroxide (its silicate modulus considered as zero). Therefore, the action of LS depending on the silicate modulus of the activator (0, 0.10, 0.25, 0.50) was studied in this paper, using non- traditional oscillation strain sweep tests. The results showed that LS works for silicate moduli of 0 and 0.10 especially in terms of great reduction in the viscoelastic moduli due to a significant decrease in zeta potential magnitude. However, LS had a marginal effect for the silicate moduli of 0.25 and 0.50, which was attributed to the competitive adsorption of LS and silicates from waterglass onto the slag grains. Although splitting of LS chains in NaOH was proven using X-ray photoelectron spectroscopy, electrostatic repulsion of smaller fragments is preserved.

Keywords

Alkali activated cement, Granulated blast-furnace slag, Admixture, Workability, Adsorption, Stability

Authors

KALINA, L.; BÍLEK, V.; HRUBÝ, P.; ILIUSHCHENKO, V.; KALINA, M.; SMILEK, J.

Released

30. 4. 2022

ISBN

0008-8846

Periodical

Cement and Concrete Research

Year of study

157

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

12

Pages count

12

URL

https://www.sciencedirect.com/science/article/pii/S0008884622001132

BibTex

@article{BUT177943,
  author="Lukáš {Kalina} and Vlastimil {Bílek} and Petr {Hrubý} and Valeriia {Hrubá} and Michal {Kalina} and Jiří {Smilek}",
  title="On the action mechanism of lignosulfonate plasticizer in alkali-activated slag-based system",
  journal="Cement and Concrete Research",
  year="2022",
  volume="157",
  number="0",
  pages="1--12",
  doi="10.1016/j.cemconres.2022.106822",
  issn="0008-8846",
  url="https://www.sciencedirect.com/science/article/pii/S0008884622001132"
}