Publication detail

The influence of aggregate grain size on the parameters of acoustic emission signals obtained from a three-point bending test on concrete specimens degraded by high-temperatures

TOPOLÁŘ, L. KEPRDOVÁ, Š. PAZDERA, L.

Original Title

The influence of aggregate grain size on the parameters of acoustic emission signals obtained from a three-point bending test on concrete specimens degraded by high-temperatures

Type

conference paper

Language

English

Original Abstract

One of the advantages of concrete when compared to other building materials is its fire resistance. Fire resistance of concrete structures depends on the thermal, mechanical and deformation properties of the used concrete. Some concrete structures can be exposed to extreme temperature conditions (e.g. concrete structures in nuclear power plants or in tunnels during fires). This paper presents the measurement results of a three-point bending test on three different mixtures of concrete specimens that have been exposed to high temperatures. The concrete specimens were heated in a programmable laboratory oven at a heating rate of 5 °C/min and were exposed to the following temperatures: 400 °C, 600 °C, 800 °C, 1000 °C and 1200 °C. The heating was maintained for 60 minutes. The obtained results indicate that the comparison of the absolute measured values is not sufficient. For this reason, the comparison of the individual mixtures is carried out using the relative values, which more clearly demonstrate the degree of damage to the concrete samples caused by exposure to elevated temperatures.

Keywords

Acoustic emission method; three-point bending test; concrete; high-temperature;

Authors

TOPOLÁŘ, L.; KEPRDOVÁ, Š.; PAZDERA, L.

Released

31. 12. 2018

Publisher

Elsevier

ISBN

2452-3216

Periodical

Procedia Structural Integrity

Year of study

13

State

Republic of Italy

Pages from

1177

Pages to

1182

Pages count

6

URL

https://www.sciencedirect.com/science/article/pii/S2452321618304827

BibTex

@inproceedings{BUT151939,
  author="Libor {Topolář} and Šárka {Keprdová} and Luboš {Pazdera}",
  title="The influence of aggregate grain size on the parameters of acoustic emission signals obtained from a three-point bending test on concrete specimens degraded by high-temperatures",
  booktitle="ECF22 - Loading and Environmental effects on Structural Integrity",
  year="2018",
  journal="Procedia Structural Integrity",
  volume="13",
  pages="1177--1182",
  publisher="Elsevier",
  doi="10.1016/j.prostr.2018.12.244",
  issn="2452-3216",
  url="https://www.sciencedirect.com/science/article/pii/S2452321618304827"
}