Publication detail

Resistance of alkali-activated blast furnace slag to acids

HRUBÝ, P. BÍLEK, V. TOPOLÁŘ, L. KALINA, L. ILIUSHCHENKO, V. KOPLÍK, J. MÁSILKO, J. ŠOUKAL, F.

Original Title

Resistance of alkali-activated blast furnace slag to acids

Type

conference paper

Language

English

Original Abstract

In this paper, the resistance of alkali-activated blast furnace slag to degradation processes caused by the action of various acids was studied. The ground granulated blast furnace slag was alkali-activated using sodium hydroxide in 6% Na2O dosage by the slag weight and subjected to testing of acid resistance in both organic and inorganic acidic solutions (pH ≈ 3) for 84 days. Citric, acetic, hydrochloric, and sulphuric acids were used for these purposes. The reference samples were stored in water. The progress of degradation was studied using the phenolphthalein technique, compressive strength testing, and weight measurements. Moreover, the SEM-EDX was used for the characterization of the degradation processes and microstructure changes. The degradation of alkali-activated blast furnace slag occurred in both organic and inorganic acids; however, the action of organic acids appears to be much more deteriorating. The decrease in compressive strength of about 50% and 60% was observed for acetic and citric acid, while only of 32% and 23% in sulphuric and hydrochloric, respectively.

Keywords

Alkali-activated materials, blast furnace slag, degradation, acid, decalcification

Authors

HRUBÝ, P.; BÍLEK, V.; TOPOLÁŘ, L.; KALINA, L.; ILIUSHCHENKO, V.; KOPLÍK, J.; MÁSILKO, J.; ŠOUKAL, F.

Released

3. 10. 2022

Publisher

IOP Publishing

Location

Telč

ISBN

1742-6596

Periodical

Journal of Physics: Conference Series

Year of study

2341

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

8

Pages count

8

URL

https://iopscience.iop.org/article/10.1088/1742-6596/2341/1/012002

BibTex

@inproceedings{BUT180520,
  author="Petr {Hrubý} and Vlastimil {Bílek} and Libor {Topolář} and Lukáš {Kalina} and Valeriia {Hrubá} and Jan {Koplík} and Jiří {Másilko} and František {Šoukal}",
  title="Resistance of alkali-activated blast furnace slag to acids",
  booktitle="IOP Conference Series: Materials Science and Engineering",
  year="2022",
  journal="Journal of Physics: Conference Series",
  volume="2341",
  pages="8",
  publisher="IOP Publishing",
  address="Telč",
  doi="10.1088/1742-6596/2341/1/01200",
  issn="1742-6596",
  url="https://iopscience.iop.org/article/10.1088/1742-6596/2341/1/012002"
}