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Naslov:Characterization of fly ash alkali activated foams obtained using sodium perborate monohydrate as a foaming agent at room and elevated temperatures
Avtorji:ID Korat Bensa, Lidija (Avtor)
ID Ducman, Vilma (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://doi.org/10.3389/fmats.2020.572347
Opis: Odprti dostop
 
.pdf PDF - Predstavitvena datoteka, prenos (7,94 MB)
MD5: B8CE387251744C098DAB67AF6AC1F3B7
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo ZAG - Zavod za gradbeništvo Slovenije
Povzetek: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.
Ključne besede:foamed alkali activated materials, geopolymers, properties, micro-CT
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:03.09.2020
Založnik:Frontiers Media S.A.
Leto izida:2020
Št. strani:str. 1-15
Številčenje:vol. 7
PID:20.500.12556/DiRROS-16812 Novo okno
UDK:620.1/.2
ISSN pri članku:2296-8016
DOI:10.3389/fmats.2020.572347 Novo okno
COBISS.SI-ID:27282179 Novo okno
Avtorske pravice:© 2020 Korat and Ducman.
Opomba:Nasl. z nasl. zaslona; Opis vira z dne 4. 9. 2020; Št. članka: 572347;
Datum objave v DiRROS:22.08.2023
Število ogledov:841
Število prenosov:456
Metapodatki:XML DC-XML DC-RDF
:
KORAT BENSA, Lidija in 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 [na spletu]. 2020. Vol. 7, p. 1–15. [Dostopano 19 marec 2025]. DOI 10.3389/fmats.2020.572347. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=16812
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Gradivo je del revije

Naslov:Frontiers in materials
Skrajšan naslov:Front. mater.
Založnik:Frontiers Media S.A.
ISSN:2296-8016
COBISS.SI-ID:28382503 Novo okno

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:J2-9197
Naslov:Sinteza in karakterizacija alkalijsko aktiviranih pen na osnovi odpadnih materialov
Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:Z2-1861
Naslov:Razvoj prahu za namene 3D-tiskanih mezostrukturnih izolacijskih materialov

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:03.09.2020
Vezano na:Version of Record valid from 2020-09-03

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:penjeni alkalijsko aktivirani materiali, geopolimeri, lastnosti, micro CT


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