Publication result detail

Comparison of the effect of different additives on acoustic emission parameters obtained during three-point bending tests of alkali-activated slag composites

TOPOLÁŘ, L.; ROVNANÍK, P.; MIZEROVÁ, C.; SCHMID, P.

Original Title

Comparison of the effect of different additives on acoustic emission parameters obtained during three-point bending tests of alkali-activated slag composites

English Title

Comparison of the effect of different additives on acoustic emission parameters obtained during three-point bending tests of alkali-activated slag composites

Type

WoS Article

Original Abstract

The development of failure in quazi-brittle materials is associated with the formation of microcracks, which is followed by the release of energy in the form of elastic ultrasonic waves. The acoustic emission method is an effective non-destructive method for the detection and determination of different damage mechanisms not only in composite materials. This experimental work presents results from the acoustic emission measurements obtained during three-point bending tests without the central notch on alkali-activated materials with various additives. The acoustic emission activity was monitored using piezoelectric sensors, and the way of damage based on parameters of acoustic emission signals was investigated. The preliminary results showed that the addition of carbon black significantly reduced the maximal stress, whereas the addition of graphite increased the brittleness of the alkali-activated material. The higher brittleness is determined by the lower number of overshoots of acoustic emission signals before the fracture of the specimens.

English abstract

The development of failure in quazi-brittle materials is associated with the formation of microcracks, which is followed by the release of energy in the form of elastic ultrasonic waves. The acoustic emission method is an effective non-destructive method for the detection and determination of different damage mechanisms not only in composite materials. This experimental work presents results from the acoustic emission measurements obtained during three-point bending tests without the central notch on alkali-activated materials with various additives. The acoustic emission activity was monitored using piezoelectric sensors, and the way of damage based on parameters of acoustic emission signals was investigated. The preliminary results showed that the addition of carbon black significantly reduced the maximal stress, whereas the addition of graphite increased the brittleness of the alkali-activated material. The higher brittleness is determined by the lower number of overshoots of acoustic emission signals before the fracture of the specimens.

Keywords

Acoustic emission method;Alkali-activated material;Three-point bending test;Microcrack;Failure

Key words in English

Acoustic emission method;Alkali-activated material;Three-point bending test;Microcrack;Failure

Authors

TOPOLÁŘ, L.; ROVNANÍK, P.; MIZEROVÁ, C.; SCHMID, P.

RIV year

2020

Released

30.11.2019

Publisher

Elsevier

Location

GB

ISBN

1350-6307

Periodical

Engineering Failure Analysis

Volume

105

Number

2019

State

United Kingdom of Great Britain and Northern Ireland

Pages from

496

Pages to

502

Pages count

7

URL

https://www.sciencedirect.com/science/article/pii/S1350630718313591

BibTex

@article{BUT157649,
  author="Libor {Topolář} and Pavel {Rovnaník} and Cecílie {Mizerová} and Pavel {Schmid}",
  title="Comparison of the effect of different additives on acoustic emission parameters obtained during three-point bending tests of alkali-activated slag composites",
  journal="Engineering Failure Analysis",
  year="2019",
  volume="105",
  number="2019",
  pages="496--502",
  doi="10.1016/j.engfailanal.2019.07.031",
  issn="1350-6307",
  url="https://www.sciencedirect.com/science/article/pii/S1350630718313591"
}