Thermal resistance variations of fly ash geopolymers: foaming responses
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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 |
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Geopolymers Fly ash geopolymers |
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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 |
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chengyongheah@hotmail.com |
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chengyongheah@hotmail.com Heah, Cheng-Yong Liew, Yun-Ming Mohd Mustafa Al Bakri, Abdullah Kamarudin, Hussin |
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Article |
author |
Heah, Cheng-Yong Liew, Yun-Ming Mohd Mustafa Al Bakri, Abdullah Kamarudin, Hussin |
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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 |
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Thermal resistance variations of fly ash geopolymers: foaming responses |
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Thermal resistance variations of fly ash geopolymers: foaming responses |
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thermal resistance variations of fly ash geopolymers: foaming responses |
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Springer Nature Limited |
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2022 |
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http://dspace.unimap.edu.my:80/xmlui/handle/123456789/74578 |
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1729704777107898368 |
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13.18916 |