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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/TH04020189" target="_blank" >TH04020189: Tepelné nano izolace pro automotive, letectví a kosmonautiku.</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Polymers

ISSN

2073-4360

e-ISSN

—

Svazek periodika

12

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

17

Strana od-do

1-18

Kód UT WoS článku

000602428400001

EID výsledku v databázi Scopus

2-s2.0-85097817432