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Naslov: Carbonation of lightweight alkali-activated aggregates based on biomass fly ash : effect on microstructure and leaching behavior Avtorji: ID Tesovnik, Anže (Avtor) ID Lisbeth M., Ottosen (Avtor) ID Ducman, Vilma (Avtor) Datoteke: URL - Izvorni URL, za dostop obiščite https://www.sciencedirect.com/science/article/pii/S2214509525008125   PDF - Predstavitvena datoteka, prenos (7,95 MB) MD5: 7D8D32DA1562B7242BCCC8AEAA8195C1   DOCX - Priloga, prenos (1,05 MB) MD5: 71C4A6952D5B7F0DC88B2A267C790B91   To gradivo ima še več datotek. Celoten seznam je na voljo spodaj. Jezik: Angleški jezik Tipologija: 1.01 - Izvirni znanstveni članek Organizacija: ZAG - Zavod za gradbeništvo Slovenije Povzetek: Artificial aggregates offer a sustainable solution to large-scale waste utilization and the increasing demand for limited natural aggregates. This study extends the understanding of the production of artificial lightweight aggregates with a variable rotation speed approach based solely on biomass fly ash (BFA) alkali-activated materials (AAMs). Systematic variation of alkali content and solution density at a constant water-to-solids ratio showed that alkali concentration significantly influences granulation beyond what can be explained by water availability. The interplay between alkali activation and carbonation was investigated using different mix designs and curing conditions, as well as comparing simultaneous curing carbonation with post-cure carbonation. The results were evaluated with regard to the effects on the macro- and microstructural properties as well as on the leaching behavior. Prolonged carbonation initiated after aggregate formation resulted in premature depletion of Ca, limiting the development of C-A-S-H gels and increasing microporosity, leading to a reduction in mechanical properties. In contrast, post-curing carbonation maintained a compressive strength of over 1 MPa while still allowing carbonation benefits, resulting in compressive strengths comparable to lightweight expanded clay aggregates. Carbonation also proved to be an effective leaching mitigation strategy by stabilizing heavy metals through both physical encapsulation and chemical pH regulation. These results underline the importance of carbonation timing in high Ca AAMs and highlight lightweight aggregates as a viable pathway for BFA valorization, CO₂ sequestration and sustainable construction applications. This approach offers an alternative valorization strategy for BFA facing regulatory restrictions for direct use in cement, while contributing to carbon capture and circular economy initiatives. Ključne besede: artificial aggregates, lightweight aggregates, biomass ash, alkali-activated materials, leaching, carbonation Status publikacije: Objavljeno Verzija publikacije: Objavljena publikacija Datum objave: 04.07.2025 Založnik: Elsevier Leto izida: 2025 Št. strani: str. 1-18 Številčenje: Vol. 23, [article no.] e05014 PID: 20.500.12556/DiRROS-23034  UDK: 620.1/.2 ISSN pri članku: 2214-5095 DOI: 10.1016/j.cscm.2025.e05014  COBISS.SI-ID: 242644483  Avtorske pravice: © 2025 The Authors Datum objave v DiRROS: 18.07.2025 Število ogledov: 438 Število prenosov: 456 Metapodatki:    Citiraj gradivo Navadno besedilo BibTeX EndNote XML EndNote/Refer RIS ABNT ACM Ref AMA APA Chicago 17th Author-Date Harvard IEEE ISO 690 MLA Vancouver : Kopiraj citat

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Gradivo je del revije

Naslov:	Case studies in construction materials
Založnik:	Elevier
ISSN:	2214-5095
COBISS.SI-ID:	520377881

Gradivo je financirano iz projekta

Financer:	EC - European Commission
Program financ.:	HE
Številka projekta:	101058162
Naslov:	Integration of Underutilized Ashes into Material Cycles by Industry-Urban Symbiosis
Akronim:	AshCycle

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Financer:	ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:	P2-0273
Naslov:	Gradbeni objekti in materiali

Licence

Licenca:	CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:	http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:	Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

Jezik:	Slovenski jezik
Ključne besede:	umetni agregati, lahki agregati, biomasni pepel, alkalijsko aktivirani materiali, izluževanje, karbonatizacija

Zbirka

To gradivo je zbirka, ki zajema naslednja gradiva:

1. Alkali-activated artificial aggregates

Datoteke

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