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KUSÁK, I. LUŇÁK, M. DVOŘÁK, R. CHOBOLA, Z.
Originální název
The assessment of mechanical properties of thermally stressed composite materials using radio frequency electrical field
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
angličtina
Originální abstrakt
The main topic of this paper is the testing of cement-based composite materials that were stressed by high temperature. Impedance spectroscopy has been used as a non-destructive measurement method. The specimens were made from mortar mixture of CEM I type Portland cement, silica sand and fine gravel of various size classes for two sets of specimens. The sets, A and B, differed from each other also by the plasticizer used. The specimens were exposed to high temperatures in the range 23–1200°C. Studying the structural changes in the process of heat build-up is an efficient way to assess the reliability of whole construction. Using the impedance spectra the relative permittivity, electrical conductivity and other characteristics have been obtained. In accordance with Debye‘s theory of dielectrics the changes of impedance parameters have been put into context with structural changes. For higher range of frequencies, 100 MHz up to 3 GHz, R&S ZNC vector analyzer with DAK 12 coaxial probe manufactured by Speag has been used. In this frequency spectrum the electrical conductivity and relative permittivity as a function of frequency have been measured.
Klíčová slova
Heat stress; concrete; impedance spectroscopy; conductivity
Autoři
KUSÁK, I.; LUŇÁK, M.; DVOŘÁK, R.; CHOBOLA, Z.
Vydáno
12. 7. 2018
Nakladatel
IOP Publishing
Místo
United Kingdom
ISSN
1757-8981
Periodikum
IOP Conference Series: Materials Science and Engineering
Stát
Spojené království Velké Británie a Severního Irska
Strany od
1
Strany do
6
Strany počet
BibTex
@inproceedings{BUT156793, author="Ivo {Kusák} and Miroslav {Luňák} and Richard {Dvořák} and Zdeněk {Chobola}", title="The assessment of mechanical properties of thermally stressed composite materials using radio frequency electrical field", booktitle="21st International Conference on Building Materials, Products and Technologies", year="2018", journal="IOP Conference Series: Materials Science and Engineering", pages="1--6", publisher="IOP Publishing", address="United Kingdom", doi="10.1088/1757-899X/379/1/012030", issn="1757-8981" }