Basic Physical, Electrical and Thermal Properties of Geopolymers with Enhanced Electrical Properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00331027" target="_blank" >RIV/68407700:21110/19:00331027 - isvavai.cz</a>

Výsledek na webu

<a href="https://aip.scitation.org/doi/10.1063/1.5120143" target="_blank" >https://aip.scitation.org/doi/10.1063/1.5120143</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5120143" target="_blank" >10.1063/1.5120143</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Basic Physical, Electrical and Thermal Properties of Geopolymers with Enhanced Electrical Properties

Popis výsledku v původním jazyce

Geopolymers can be considered as competitive construction materials to cement-based materials. It is mainly due to their high strength, good chemical resistance, thermal stability and favorable development of hydration heat at early age. A reasonable amount of electrically conductive admixtures close to the percolation threshold enhances electrical properties of geopolymers which leads to their potential utilization in self-heating applications. In general, electrical and thermal conductivity is essential for an effective heat evolution and distribution through the material. Sufficiently high electrical conductivity ensures evolution of Joule’s heat initiated by acting of a power supply, whereas sufficiently high thermal conductivity ensures effective spreading of the generated heat. To assess the self-heating ability of such materials and effectiveness of their self-heating, it is necessary to experimentally determine electrical and thermal properties. In this paper, basic physical, electrical and thermal properties of geopolymers with different dosages of electrically conductive carbon black admixture are measured. Basic physical properties are determined by the gravimetric method, DC electrical properties by the 4-probes method and thermal properties by the pulse method. Addition of 10 wt. % of CB to the reference geopolymer is found to lead to a significant increase of electrical conductivity at the cost of a decrease of thermal conductivity. Nevertheless, geopolymer enhanced in such a way can be considered as a promising self-heating material.

Název v anglickém jazyce

Basic Physical, Electrical and Thermal Properties of Geopolymers with Enhanced Electrical Properties

Popis výsledku anglicky

Geopolymers can be considered as competitive construction materials to cement-based materials. It is mainly due to their high strength, good chemical resistance, thermal stability and favorable development of hydration heat at early age. A reasonable amount of electrically conductive admixtures close to the percolation threshold enhances electrical properties of geopolymers which leads to their potential utilization in self-heating applications. In general, electrical and thermal conductivity is essential for an effective heat evolution and distribution through the material. Sufficiently high electrical conductivity ensures evolution of Joule’s heat initiated by acting of a power supply, whereas sufficiently high thermal conductivity ensures effective spreading of the generated heat. To assess the self-heating ability of such materials and effectiveness of their self-heating, it is necessary to experimentally determine electrical and thermal properties. In this paper, basic physical, electrical and thermal properties of geopolymers with different dosages of electrically conductive carbon black admixture are measured. Basic physical properties are determined by the gravimetric method, DC electrical properties by the 4-probes method and thermal properties by the pulse method. Addition of 10 wt. % of CB to the reference geopolymer is found to lead to a significant increase of electrical conductivity at the cost of a decrease of thermal conductivity. Nevertheless, geopolymer enhanced in such a way can be considered as a promising self-heating material.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA19-11516S" target="_blank" >GA19-11516S: Geopolymery pro sofistikované aplikace ve stavebnictví</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Central European Symposium on Thermophysics 2019 (CEST)

ISBN

978-0-7354-1876-9

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

—

Název nakladatele

AIP Conference Proceedings

Místo vydání

New York

Místo konání akce

Banská Bystrica, Slovakia

Datum konání akce

16. 10. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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