Detail publikačního výsledku

Durability of alkali-activated concretes containing cement kiln by-pass dust

BÍLEK, V.; BÍLEK, V.; KALINA, L.; KHESTL, F.; PALOVČÍK, J.; ŠIMONOVÁ, H.

Originální název

Durability of alkali-activated concretes containing cement kiln by-pass dust

Anglický název

Durability of alkali-activated concretes containing cement kiln by-pass dust

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

The aim of the presented work was evaluation of an effect of various conditions on the performance of two developed concretes based on alkali-activated slag and cement kiln by-pass dust (BD). BD was used as a partial replacement of natural aggregates while slag as an aluminosilicate precursor activated by a combination of waterglass and sodium hydroxide solution (resulting silicate modulus of 0.5). The concretes differed only in an activator dose which was 4 and 6% of Na2O with respect to the slag weight. The prepared specimens were sealed-cured for the first 28 days and then their resistance to freeze-thaw cycles and aggressive solutions (ammonium nitrate, acetic acid and sulphates) was tested. Evolution of dynamic modulus showed that both concretes resisted well to freeze-thaw cycles as well as to most solutions, where their dynamic modulus tended to increase in most cases or did not change significantly. Only the concrete with 4% Na2O showed poor resistance to acetic acid solution as the specimens completely disintegrated until 50 days.

Anglický abstrakt

The aim of the presented work was evaluation of an effect of various conditions on the performance of two developed concretes based on alkali-activated slag and cement kiln by-pass dust (BD). BD was used as a partial replacement of natural aggregates while slag as an aluminosilicate precursor activated by a combination of waterglass and sodium hydroxide solution (resulting silicate modulus of 0.5). The concretes differed only in an activator dose which was 4 and 6% of Na2O with respect to the slag weight. The prepared specimens were sealed-cured for the first 28 days and then their resistance to freeze-thaw cycles and aggressive solutions (ammonium nitrate, acetic acid and sulphates) was tested. Evolution of dynamic modulus showed that both concretes resisted well to freeze-thaw cycles as well as to most solutions, where their dynamic modulus tended to increase in most cases or did not change significantly. Only the concrete with 4% Na2O showed poor resistance to acetic acid solution as the specimens completely disintegrated until 50 days.

Klíčová slova

alkali-activated slag; durability; freeze-thaw; acetic acid; ammonium nitrate; sulphate; activator dose

Klíčová slova v angličtině

alkali-activated slag; durability; freeze-thaw; acetic acid; ammonium nitrate; sulphate; activator dose

Autoři

BÍLEK, V.; BÍLEK, V.; KALINA, L.; KHESTL, F.; PALOVČÍK, J.; ŠIMONOVÁ, H.

Rok RIV

2021

Vydáno

18.01.2021

Nakladatel

IOP Publishing

Kniha

International Conference Building Materials, Products and Technologies

ISSN

1757-8981

Periodikum

IOP Conference Series: Materials Science and Engineering

Svazek

1039

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

8

Strany počet

8

URL

https://iopscience.iop.org/article/10.1088/1757-899X/1039/1/012012

Plný text v Digitální knihovně

http://hdl.handle.net/11012/201015

BibTex

@inproceedings{BUT171253,
  author="Vlastimil {Bílek} and Vlastimil {Bílek} and Lukáš {Kalina} and Filip {Khestl} and Jakub {Palovčík} and Hana {Šimonová}",
  title="Durability of alkali-activated concretes containing cement kiln by-pass dust",
  booktitle="International Conference Building Materials, Products and Technologies",
  year="2021",
  journal="IOP Conference Series: Materials Science and Engineering",
  volume="1039",
  pages="1--8",
  publisher="IOP Publishing",
  doi="10.1088/1757-899X/1039/1/012012",
  issn="1757-8981",
  url="https://iopscience.iop.org/article/10.1088/1757-899X/1039/1/012012"
}

Dokumenty

Bilek_2021