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Thermal resistance variations of fly ash geopolymers: foaming responses

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Main Authors: Heah, Cheng-Yong, Liew, Yun-Ming, Mohd Mustafa Al Bakri, Abdullah, Kamarudin, Hussin
Other Authors: chengyongheah@hotmail.com
Format: Article
Language:English
Published: Springer Nature Limited 2022
Subjects:
Geopolymers
Fly ash geopolymers
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/74578
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spelling my.unimap-745782022-03-07T03:00:35Z Thermal resistance variations of fly ash geopolymers: foaming responses Heah, Cheng-Yong Liew, Yun-Ming Mohd Mustafa Al Bakri, Abdullah Kamarudin, Hussin chengyongheah@hotmail.com Geopolymers Fly ash geopolymers Link to publisher's homepage at https://www.nature.com/ This paper presents a comparative study of the characteristic of unfoamed and foamed geopolymers after exposure to elevated temperatures (200–800 °C). Unfoamed geopolymers were produced with Class F fly ash and sodium hydroxide and liquid sodium silicate. Porous geopolymers were prepared by foaming with hydrogen peroxide. Unfoamed geopolymers possessed excellent strength of 44.2 MPa and degraded 34% to 15 MPa in foamed geopolymers. The strength of unfoamed geopolymers decreased to 5 MPa with increasing temperature up to 800 °C. Foamed geopolymers behaved differently whereby they deteriorated to 3 MPa at 400 °C and increased up to 11 MPa at 800 °C. Even so, the geopolymers could withstand high temperature without any disintegration and spalling up to 800 °C. The formation of crystalline phases at higher temperature was observed deteriorating the strength of unfoamed geopolymers but enhance the strength of foamed geopolymers. In comparison, foamed geopolymer had better thermal resistance than unfoamed geopolymers as pores provide rooms to counteract the internal damage. 2022-03-07T03:00:35Z 2022-03-07T03:00:35Z 2017-03 Article Scientific Reports, vol.7, 2017, 11 pages 2045-2322 (online) http://dspace.unimap.edu.my:80/xmlui/handle/123456789/74578 https://doi.org/10.1038/srep45355 en Springer Nature Limited
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Geopolymers
Fly ash geopolymers
spellingShingle Geopolymers
Fly ash geopolymers
Heah, Cheng-Yong
Liew, Yun-Ming
Mohd Mustafa Al Bakri, Abdullah
Kamarudin, Hussin
Thermal resistance variations of fly ash geopolymers: foaming responses
description Link to publisher's homepage at https://www.nature.com/
author2 chengyongheah@hotmail.com
author_facet chengyongheah@hotmail.com
Heah, Cheng-Yong
Liew, Yun-Ming
Mohd Mustafa Al Bakri, Abdullah
Kamarudin, Hussin
format Article
author Heah, Cheng-Yong
Liew, Yun-Ming
Mohd Mustafa Al Bakri, Abdullah
Kamarudin, Hussin
author_sort Heah, Cheng-Yong
title Thermal resistance variations of fly ash geopolymers: foaming responses
title_short Thermal resistance variations of fly ash geopolymers: foaming responses
title_full Thermal resistance variations of fly ash geopolymers: foaming responses
title_fullStr Thermal resistance variations of fly ash geopolymers: foaming responses
title_full_unstemmed Thermal resistance variations of fly ash geopolymers: foaming responses
title_sort thermal resistance variations of fly ash geopolymers: foaming responses
publisher Springer Nature Limited
publishDate 2022
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/74578
_version_ 1729704777107898368
score 13.222552

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