Detail publikace

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.

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Vydáno

30. 4. 2022

ISSN

0008-8846

Periodikum

Cement and Concrete Research

Ročník

157

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

12

Strany počet

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"
}