Study on temperature-dependent properties and fire resistance of metakaolin-based geopolymer foams

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F20%3A00008009" target="_blank" >RIV/46747885:24210/20:00008009 - isvavai.cz</a>

Result on the web

<a href="https://res.mdpi.com/d_attachment/polymers/polymers-12-02994/article_deploy/polymers-12-02994.pdf" target="_blank" >https://res.mdpi.com/d_attachment/polymers/polymers-12-02994/article_deploy/polymers-12-02994.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/polym12122994" target="_blank" >10.3390/polym12122994</a>

Result language

angličtina

Original language name

Study on temperature-dependent properties and fire resistance of metakaolin-based geopolymer foams

Original language description

This paper presents temperature-dependent properties and fire resistance of geopolymer foams made of ground basalt fibers, aluminum foaming agent and potassium-activated metakaolin-based geopolymer. Temperature-dependent properties of basalt-reinforced geopolymer foams (BGFs) were investigated by a series of measurements, including apparent density, vvater absorption, mass loss, drying shrinkage, compressive and flexural strengths, XRD, and SEM. Results showed that the apparent density and drying shrinkage of the BGFs increase with increasing the treated temperature from 400 CC to 1200 °C. Below 600 °C the mass loss is enhanced while the vvater absorption is reduced and they both vary slightly between 600 °C and 1000 °C. Above 1000 °C the mass loss is decreased rapid ly, whereas the water absorption is increased. The compressive and flexural strengths of the BGFs with high fiber content are improved significantly at temperatures over 600 °C and achieved the maximum at 1200 °C. The BGF with high fiber loading at 1200 °C exhibited a substantial increase in compressive strength by 108% and flexural strength by 116% compared to that at room temperature. The enhancement in the BGF strengths at high temperatures is attributed to the development of crystalline phases and structural densification. Theretore, the BGFs with high fiber loading ha ve extraordinary mechanical stability at high temperatures. The fire resistance of wood and steel plates has been considerably improved after coating a BGF layer on their surface. The coated BGF remained its structural integrity vvithout any considerable macroscopic damage after fire resistance test. The longest fire-resistant times for the wood and steel plates are 99 min and 134 min, respectively. In generál, the BGFs with excellent fire resistance have great potential for fire protection applications.

Czech name

—

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

—

OECD FORD branch

10404 - Polymer science

Project

<a href="/en/project/TH04020189" target="_blank" >TH04020189: 47/5000 Thermal nano insulation for automotive, aviation and aeronautics.</a><br>

Continuities

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

Publication year

2020

Confidentiality

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

Name of the periodical

Polymers

ISSN

2073-4360

e-ISSN

—

Volume of the periodical

12

Issue of the periodical within the volume

12

Country of publishing house

CH - SWITZERLAND

Number of pages

17

Pages from-to

1-18

UT code for WoS article

000602428400001

EID of the result in the Scopus database

2-s2.0-85097817432