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Naslov:The deformation of alkali-activated materials at an early age under different curing conditions
Avtorji:ID Češnovar, Mark (Avtor)
ID Traven, Katja (Avtor)
ID Ducman, Vilma (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://www.frontiersin.org/articles/10.3389/fchem.2021.694454/abstract
Opis: Odprti dostop
 
.pdf PDF - Predstavitvena datoteka, prenos (2,23 MB)
MD5: E9743956551A9AF26845CAE28B5D9657
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo ZAG - Zavod za gradbeništvo Slovenije
Povzetek:The production of alkali-activated materials (AAMs) is known for its environmentally friendly processing method, where several amorphous-rich aluminosilicate material sources combine with an alkali media solution to form solid, ceramic-like materials. In terms of the Si:Al, Na(K):Al, and Na(K):H2O ratios, the theory of AAM formation is quite well developed, but some open questions in the technology process remain, especially with regards to the means of curing, where the generation of defects can be persistent. Knowing that deformation is extremely high in the early ages, this study investigates the effects of temperature and moisture on shrinkage behavior within the first 72 h of AA pastes made from ladle (LS) and electric arc furnace (EAF) slag and activated by sodium silicate (Na2SiO3). The method to determine the deformation of alkali-activated slag-based materials, in terms of both autogenous and drying shrinkage, was based on the modified ASTM C1698-19 standard for the measurement of autogenous shrinkage in cement pastes. Autogenous deformation and strain were measured in four samples, using the standard procedure at room temperature, 40 and 60°C. Furthermore, using an adjusted method, nine samples were characterized for strain and partial surface pressure, while drying at room temperature, 40, or 60°C at a relative humidity of 30 or 90%. The results show that the highest rate of autogenous shrinkage occurred at a temperature of 60°C, followed by drying shrinkage at 60°C and 30% relative humidity, owing to the fact that the rate of evaporation was highest at this moisture content. The study aimed to provide guidance regarding selection of the optimal curing set in order to minimize deformations in slag-based alkali-activated materials. In the present case, curing at a temperature of around 40°C under lower moisture conditions for the first 24 h provided optimal mechanical properties for the slags investigated. The methodology might also be of use for other aluminosilicate sources such as metakaolin, fly ash, and mineral wool–based alkali-activated materials.
Ključne besede:alkali-activated materials, slag, drying, autogenous shrinkage, partial surface pressure, curing deformation
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:08.06.2021
Založnik:Frontiers Editorial Office
Leto izida:2021
Št. strani:str. 1-9
Številčenje:Vol. 9
PID:20.500.12556/DiRROS-15854 Novo okno
UDK:620.1/.2
ISSN pri članku:2296-2646
DOI:10.3389/fchem.2021.694454 Novo okno
COBISS.SI-ID:63784707 Novo okno
Avtorske pravice:© 2021 Češnovar, Traven and Ducman.
Opomba:Nasl. z nasl. zaslona; Opis vira z dne 19. 5. 2021;
Datum objave v DiRROS:03.07.2023
Število ogledov:985
Število prenosov:457
Metapodatki:XML DC-XML DC-RDF
:
ČEŠNOVAR, Mark, TRAVEN, Katja in DUCMAN, Vilma, 2021, The deformation of alkali-activated materials at an early age under different curing conditions. Frontiers in chemistry [na spletu]. 2021. Vol. 9, p. 1–9. [Dostopano 23 marec 2025]. DOI 10.3389/fchem.2021.694454. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=15854
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Gradivo je del revije

Naslov:Frontiers in chemistry
Skrajšan naslov:Front. chem.
Založnik:Frontiers Editorial Office
ISSN:2296-2646
COBISS.SI-ID:1647919 Novo okno

Gradivo je financirano iz projekta

Financer:Drugi - Drug financer ali več financerjev
Program financ.:ERA-MIN2
Številka projekta:C 3330–18-252010
Naslov:Lightweight alkali activated composite foams based on secondary raw materials
Akronim:FLOW
Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:J2-9197
Naslov:Sinteza in karakterizacija alkalijsko aktiviranih pen na osnovi odpadnih 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:08.06.2021
Vezano na:Version of Record valid from 2021-06-08

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:alkalijsko aktivirani materiali, žlindra, sušenje, avtogeno krčenje, delni površinski tlak, nega, deformacije


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