Publication detail

Local fracture toughness of alkali-activated aluminosilicate composites with ceramic precursor assessed via fracture and scratch tests

NĚMEČEK, J. ČTVRTLÍK, R. VÁCLAVEK, L. NĚMEČEK, J. ČAIROVIĆ, I. ŠIMONOVÁ, H. DANĚK, P. FRANTÍK, P. ROVNANÍKOVÁ, P. KERŠNER, Z.

Original Title

Local fracture toughness of alkali-activated aluminosilicate composites with ceramic precursor assessed via fracture and scratch tests

Type

conference paper

Language

English

Original Abstract

The paper deals with the assessment of fracture toughness of selected alkali-activated aluminosilicate composite (AAAS) made of ceramic brick dust as a precursor, an alkaline activator with the silicate modulus of Ms = 1.0 and a quartz sand filler. The composite is characterized by a highly heterogeneous microstructure whose fracture behavior is of high interest since the material uses waste material and is used as an alternative to ordinary concretes. From three-point fracture bending tests on 40 × 40 × 160 mm specimens, effective fracture toughness and unstable fracture toughness values were determined using the Effective Crack Model and the Double-K Fracture Model. The microstructural phases of the specimens were tested for local fracture toughness via nano-scratch with spherical tip. Mutual comparisons for micro- and macroscopic toughness values were made. Local values were separated into several composite phases with the aid of scanning electron microscope imaging. The microscopic fracture toughness of the main reaction product correlates closly to values determined from macroscopic tests.

Keywords

fracture, toughness, alkali-activated, composite

Authors

NĚMEČEK, J.; ČTVRTLÍK, R.; VÁCLAVEK, L.; NĚMEČEK, J.; ČAIROVIĆ, I.; ŠIMONOVÁ, H.; DANĚK, P.; FRANTÍK, P.; ROVNANÍKOVÁ, P.; KERŠNER, Z.

Released

18. 8. 2023

Publisher

AIP Publishing

Location

Melville

ISBN

978-0-7354-4514-7

Book

AIP Conf. Proc. Special Concrete and Composites 2021

ISBN

1551-7616

Periodical

AIP Conference Proceedings

Year of study

2780

State

United States of America

Pages count

6

URL

https://pubs.aip.org/aip/acp/article/2780/1/020031/2907212/Local-fracture-toughness-of-alkali-activated

BibTex

@inproceedings{BUT185236,
  author="Jiří {Němeček} and Radim {Čtvrtlík} and Lukáš {Václavek} and Jiří {Němeček} and Iva {Čairović} and Hana {Šimonová} and Petr {Daněk} and Petr {Frantík} and Pavla {Rovnaníková} and Zbyněk {Keršner}",
  title="Local fracture toughness of alkali-activated aluminosilicate composites with ceramic precursor assessed via fracture and scratch tests",
  booktitle="AIP Conf. Proc. Special Concrete and Composites 2021",
  year="2023",
  journal="AIP Conference Proceedings",
  volume="2780",
  pages="6",
  publisher="AIP Publishing",
  address="Melville",
  doi="10.1063/5.0137677",
  isbn="978-0-7354-4514-7",
  issn="1551-7616",
  url="https://pubs.aip.org/aip/acp/article/2780/1/020031/2907212/Local-fracture-toughness-of-alkali-activated"
}