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Fire Resistance of Alkali Activated Geopolymer Foams Produced from Metakaolin and Na(2)O(2)
This work aims to investigate the feasibility that alkali-based geopolymer foams produced from metakaolin and Na(2)O(2) are applied for fire protection. Dry bulk density, porosity, mechanical strength, thermal conductivity, and fire resistance of the geopolymer foams are discussed as a function of t...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7040700/ https://www.ncbi.nlm.nih.gov/pubmed/31979173 http://dx.doi.org/10.3390/ma13030535 |
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author | Peng, Xi Li, Han Shuai, Qin Wang, Liancong |
author_facet | Peng, Xi Li, Han Shuai, Qin Wang, Liancong |
author_sort | Peng, Xi |
collection | PubMed |
description | This work aims to investigate the feasibility that alkali-based geopolymer foams produced from metakaolin and Na(2)O(2) are applied for fire protection. Dry bulk density, porosity, mechanical strength, thermal conductivity, and fire resistance of the geopolymer foams are discussed as a function of the Na(2)O(2) amounts. As Na(2)O(2) content varies from 1% to 4%, dry bulk density, mechanical strength and thermal conductivity of the geopolymer foams approximately exhibit opposite trends with that of the porosity. At the later stage of the 3 h fire-resistance tests, the reverse-side temperatures of all tested samples were always maintained at 220–250 °C. Meanwhile, the amorphous skeleton structures have been converted to smooth ceramics during the high temperature processes, which is the main reason that the geopolymer foams possess a stable porous structure and excellent fire resistance. Therefore, we could conclude that alkali-activated geopolymer foams with extraordinary fire resistance have great potential for fire protection applications. |
format | Online Article Text |
id | pubmed-7040700 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-70407002020-03-09 Fire Resistance of Alkali Activated Geopolymer Foams Produced from Metakaolin and Na(2)O(2) Peng, Xi Li, Han Shuai, Qin Wang, Liancong Materials (Basel) Article This work aims to investigate the feasibility that alkali-based geopolymer foams produced from metakaolin and Na(2)O(2) are applied for fire protection. Dry bulk density, porosity, mechanical strength, thermal conductivity, and fire resistance of the geopolymer foams are discussed as a function of the Na(2)O(2) amounts. As Na(2)O(2) content varies from 1% to 4%, dry bulk density, mechanical strength and thermal conductivity of the geopolymer foams approximately exhibit opposite trends with that of the porosity. At the later stage of the 3 h fire-resistance tests, the reverse-side temperatures of all tested samples were always maintained at 220–250 °C. Meanwhile, the amorphous skeleton structures have been converted to smooth ceramics during the high temperature processes, which is the main reason that the geopolymer foams possess a stable porous structure and excellent fire resistance. Therefore, we could conclude that alkali-activated geopolymer foams with extraordinary fire resistance have great potential for fire protection applications. MDPI 2020-01-22 /pmc/articles/PMC7040700/ /pubmed/31979173 http://dx.doi.org/10.3390/ma13030535 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Peng, Xi Li, Han Shuai, Qin Wang, Liancong Fire Resistance of Alkali Activated Geopolymer Foams Produced from Metakaolin and Na(2)O(2) |
title | Fire Resistance of Alkali Activated Geopolymer Foams Produced from Metakaolin and Na(2)O(2) |
title_full | Fire Resistance of Alkali Activated Geopolymer Foams Produced from Metakaolin and Na(2)O(2) |
title_fullStr | Fire Resistance of Alkali Activated Geopolymer Foams Produced from Metakaolin and Na(2)O(2) |
title_full_unstemmed | Fire Resistance of Alkali Activated Geopolymer Foams Produced from Metakaolin and Na(2)O(2) |
title_short | Fire Resistance of Alkali Activated Geopolymer Foams Produced from Metakaolin and Na(2)O(2) |
title_sort | fire resistance of alkali activated geopolymer foams produced from metakaolin and na(2)o(2) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7040700/ https://www.ncbi.nlm.nih.gov/pubmed/31979173 http://dx.doi.org/10.3390/ma13030535 |
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