The assessment of mechanical properties of thermally stressed composite materials using radio frequency electrical field

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU132021" target="_blank" >RIV/00216305:26110/18:PU132021 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26110/18:PU128470 RIV/00216305:26110/19:PU132021

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1757-899X/379/1/012030" target="_blank" >http://dx.doi.org/10.1088/1757-899X/379/1/012030</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1757-899X/379/1/012030" target="_blank" >10.1088/1757-899X/379/1/012030</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The assessment of mechanical properties of thermally stressed composite materials using radio frequency electrical field

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

The assessment of mechanical properties of thermally stressed composite materials using radio frequency electrical field

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA16-02261S" target="_blank" >GA16-02261S: Využití akustických metod pro nedestruktivní testování stavu betonu degradovaného vysokou teplotou</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

21st International Conference on Building Materials, Products and Technologies

ISBN

—

ISSN

1757-8981

e-ISSN

—

Počet stran výsledku

6

Strana od-do

1-6

Název nakladatele

IOP Publishing

Místo vydání

United Kingdom

Místo konání akce

Češkovice

Datum konání akce

29. 5. 2018

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000478563100030