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Title:Characterization of fly ash alkali activated foams obtained using sodium perborate monohydrate as a foaming agent at room and elevated temperatures
Authors:ID Korat Bensa, Lidija (Author)
ID Ducman, Vilma (Author)
Files:URL URL - Source URL, visit https://doi.org/10.3389/fmats.2020.572347
Description: Odprti dostop
 
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MD5: B8CE387251744C098DAB67AF6AC1F3B7
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract:Alkali activated foams have been extensively studied in recent years, due to their high performance and low environmental footprint compared to foams produced via other methods. Three types of fly ash differing in chemical and mineralogical composition and specific surface were used to synthesize alkali activated foams. Sodium perborate monohydrate was added as a foaming agent and sodium dodecyl sulphate as a stabilizing agent. Foams were characterized at room temperature and after exposure to an elevated temperature (1,000 °C). Densities from 1.2 down to 0.3 g/cm 3 were obtained, depending on the type of fly ash and quantity of foaming agent added. Correspondingly, compressive strength ranged from 1 to 6 MPa. Comparing all three fly ashes the most favorable results, in terms of density and corresponding compressive strength, were achieved from the fly ash with the highest amounts of SiO 2 and Al2 O 3 , as well as the highest amorphous phase content i.e., RI fly ash. Furthermore, after firing to 1,000 °C, the density of samples prepared using fly ash RI remained approximately the same, while the compressive strength increased on average by 50%. In the other two types of fly ash the density increased slightly after firing, due to significant shrinkage, and compressive strength increased by as much as 800%. X-ray powder diffraction analysis confirmed the occurrence of a crystallization process after firing to 1,000 ° C, which resulted in newly formed crystal phases, including nepheline, sodalite, tridymite, and gehlenite.
Keywords:foamed alkali activated materials, geopolymers, properties, micro-CT
Publication status:Published
Publication version:Version of Record
Publication date:03.09.2020
Publisher:Frontiers Media S.A.
Year of publishing:2020
Number of pages:str. 1-15
Numbering:vol. 7
PID:20.500.12556/DiRROS-16812 New window
UDC:620.1/.2
ISSN on article:2296-8016
DOI:10.3389/fmats.2020.572347 New window
COBISS.SI-ID:27282179 New window
Copyright:© 2020 Korat and Ducman.
Note:Nasl. z nasl. zaslona; Opis vira z dne 4. 9. 2020; Št. članka: 572347;
Publication date in DiRROS:22.08.2023
Views:811
Downloads:456
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KORAT BENSA, Lidija and DUCMAN, Vilma, 2020, Characterization of fly ash alkali activated foams obtained using sodium perborate monohydrate as a foaming agent at room and elevated temperatures. Frontiers in materials [online]. 2020. Vol. 7, p. 1–15. [Accessed 19 March 2025]. DOI 10.3389/fmats.2020.572347. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=16812
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Record is a part of a journal

Title:Frontiers in materials
Shortened title:Front. mater.
Publisher:Frontiers Media S.A.
ISSN:2296-8016
COBISS.SI-ID:28382503 New window

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:J2-9197
Name:Sinteza in karakterizacija alkalijsko aktiviranih pen na osnovi odpadnih materialov
Funder:ARRS - Slovenian Research Agency
Project number:Z2-1861
Name:Razvoj prahu za namene 3D-tiskanih mezostrukturnih izolacijskih materialov

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:03.09.2020
Applies to:Version of Record valid from 2020-09-03

Secondary language

Language:Slovenian
Keywords:penjeni alkalijsko aktivirani materiali, geopolimeri, lastnosti, micro CT


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