Determination of the Thermal Parameters of Geopolymers Modified with Iron Powder

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F22%3A00009918" target="_blank" >RIV/46747885:24210/22:00009918 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2073-4360/14/10/2009" target="_blank" >https://www.mdpi.com/2073-4360/14/10/2009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/polym14102009" target="_blank" >10.3390/polym14102009</a>

Result language

angličtina

Original language name

Determination of the Thermal Parameters of Geopolymers Modified with Iron Powder

Original language description

The paper presents the results of research concerning the influence of a metallic micromaterial on the thermal conductivity lambda, specific heat Cp, and thermal diffusivity a of modified geopolymers. Iron oxide in the form of powder with an average granulation of 10 mu m was used as the geopolymer-modifying material. The research concerned geopolymer composite samples with metakaolin (activated with potassium silicate) and the addition of iron in amounts ranging from 0.5% to 2.5% in relation to the weight of the metakaolin. Additionally, the samples were modified with sand and fireclay in two different amounts-1:1 and 1:1.2 in relation to the metakaolin. The addition of fireclay caused a decrease in the thermal conductivity of the composites by 30% when compared to the samples with the addition of sand. The lowest value of the thermal conductivity coefficient lambda was obtained for the geopolymer with metakaolin and fireclay. When the ratio of these components in the composite was 1:1, the value of thermal conductivity was equal to 0.6413 W/(m center dot K), while in the case of their ratio being 1:1.2, it was equal to 0.6456 W/(m center dot K). In the samples containing fireclay, no significant influence of the added iron on the values of thermal conductivity was noticed. In the case of the geopolymer with sand, the effect was noticeable, and it was most visible in the samples containing metakaolin and sand in the ratio of 1:1.2. It was noticed that with an increase in the addition of Fe, the thermal conductivity of the composite increased.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Polymers

ISSN

2073-4360

e-ISSN

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Volume of the periodical

14

Issue of the periodical within the volume

10

Country of publishing house

CH - SWITZERLAND

Number of pages

16

Pages from-to

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UT code for WoS article

000801250100001

EID of the result in the Scopus database

2-s2.0-85130596981