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Cheng-Yong H, Yun-Ming L, Abdullah MM, et al. Thermal Resistance Variations of Fly Ash Geopolymers: Foaming Responses. Sci Rep. 2017;7:45355doi: 10.1038/srep45355.
Cheng-Yong, H., Yun-Ming, L., Abdullah, M. M., & Hussin, K. (2017). Thermal Resistance Variations of Fly Ash Geopolymers: Foaming Responses. Scientific reports, 745355. https://doi.org/10.1038/srep45355
Cheng-Yong, Heah, et al. "Thermal Resistance Variations of Fly Ash Geopolymers: Foaming Responses." Scientific reports vol. 7 (2017): 45355. doi: https://doi.org/10.1038/srep45355
Cheng-Yong H, Yun-Ming L, Abdullah MM, Hussin K. Thermal Resistance Variations of Fly Ash Geopolymers: Foaming Responses. Sci Rep. 2017 Mar 27;7:45355. doi: 10.1038/srep45355. PMID: 28345643; PMCID: PMC5366939.
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Sci Rep. 2017 Mar 27;7:45355. doi: 10.1038/srep45355.

Thermal Resistance Variations of Fly Ash Geopolymers: Foaming Responses.

Scientific reports

Heah Cheng-Yong, Liew Yun-Ming, Mohd Mustafa Al Bakri Abdullah, Kamarudin Hussin

Affiliations

  1. Center of Excellence Geopolymer and Green Technology (CEGeoGTech), School of Materials Engineering, Universiti Malaysia Perlis (UniMAP), 01000, P.O. Box 77, D/A Pejabat Pos Besar, Kangar, Perlis, Malaysia.
  2. Faculty of Engineering Technology, Universiti Malaysia Perlis (UniMAP), P.O. Box 77, D/A Pejabat Pos Besar, Kangar, Perlis 01000, Malaysia.

PMID: 28345643 PMCID: PMC5366939 DOI: 10.1038/srep45355

Abstract

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.

References

  1. Philos Trans A Math Phys Eng Sci. 2006 Jan 15;364(1838):125-46 - PubMed
  2. Materials (Basel). 2016 Jun 03;9(6):null - PubMed

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