Publication result 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
English Title
On the action mechanism of lignosulfonate plasticizer in alkali-activated slag-based system
Type
WoS Article
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.
English 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
Key words in English
Alkali activated cement, Granulated blast-furnace slag, Admixture, Workability, Adsorption, Stability
Authors
KALINA, L.; BÍLEK, V.; HRUBÝ, P.; ILIUSHCHENKO, V.; KALINA, M.; SMILEK, J.
RIV year
2023
Released
30.04.2022
ISBN
0008-8846
Periodical
CEMENT AND CONCRETE RESEARCH
Volume
157
State
United Kingdom of Great Britain and Northern Ireland
Pages from
1
Pages to
12
Pages count
12
URL
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"
}