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Title:Alkali activation of metallurgical slags : reactivity, chemical behavior, and environmental assessment
Authors:ID Lancellotti, Isabella (Author)
ID Piccolo, Federica (Author)
ID Traven, Katja (Author)
ID Češnovar, Mark (Author)
ID Ducman, Vilma (Author)
ID Leonelli, Cristina (Author)
Files:URL URL - Source URL, visit https://www.mdpi.com/1996-1944/14/3/639
Description: Open access
 
.pdf PDF - Presentation file, download (4,49 MB)
MD5: B079326BF7836ED56FB673476DE83E5C
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract:Alkali-activated materials (AAMs) represent a promising alternative to conventional building materials and ceramics. Being produced in large amounts as aluminosilicate-rich secondary products, such as slags, they can be utilized for the formulation of AAMs. Slags are partially crystalline metallurgical residues produced during the high temperature separation of metallic and non-metallic materials in the steelmaking processes. In the present study, the electric arc furnace carbon or stainless steel slag (EAF) and secondary metallurgical slag such as ladle furnace basic slag (LS) were used as precursors in an alkali-activation process. EAF slag, with its amorphous fraction of about 56%, presented higher contents of soluble Si and Al species with respect to ladle slag R (35%). However, both are suitable to produce AAM. The leaching behavior shows that all the release values are below the regulation limit. All the bivalent ions (Ba, Cd, Cu, Ni, Pb, and Zn) are well immobilized in a geopolymeric matrix, while amphoteric elements, such as As and Cr, show a slight increase of release with respect to the corresponding slag in alkaline and aqueous environments. In particular, for Sb and As of AAM, release still remains below the regulation limits, while Mo presents an increase of leaching values that slightly exceeds the limit for landfill non-dangerous waste.
Keywords:slag, aluminosilicate materials, chemical reactivity, cold consolidation, alkali activation, leaching test, open access
Publication status:Published
Publication version:Version of Record
Publication date:30.01.2021
Publisher:Molecular Diversity Preservation International
Year of publishing:2021
Number of pages:str. 1-19
Numbering:Vol. 14, iss. 3
PID:20.500.12556/DiRROS-16244 New window
UDC:620.1/2
ISSN on article:1996-1944
DOI:10.3390/ma14030639 New window
COBISS.SI-ID:49408515 New window
Copyright:© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Note:Nasl. z nasl. zaslona; Opis vira z dne 14. 1. 2021; Št. članka 639;
Publication date in DiRROS:22.05.2023
Views:805
Downloads:421
Metadata:XML DC-XML DC-RDF
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LANCELLOTTI, Isabella, PICCOLO, Federica, TRAVEN, Katja, ČEŠNOVAR, Mark, DUCMAN, Vilma and LEONELLI, Cristina, 2021, Alkali activation of metallurgical slags : reactivity, chemical behavior, and environmental assessment. Materials [online]. 2021. Vol. 14, no. 3, p. 1–19. [Accessed 20 March 2025]. DOI 10.3390/ma14030639. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=16244
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Record is a part of a journal

Title:Materials
Shortened title:Materials
Publisher:Molecular Diversity Preservation International
ISSN:1996-1944
COBISS.SI-ID:33588485 New window

Document is financed by a project

Funder:EC - European Commission
Funding programme:ERA-MIN 2 Raw materials for sustainable development and the circular economy
Project number:ERA-MIN-2017_94/FLOW
Name:Lightweight alkali-activated composite foams based on secondary raw materials
Acronym:FLOW
Funder:Other - Other funder or multiple funders
Project number:C 3330-18-252010
Name:Raziskovalci-2.0-ZAG-52903

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.

Secondary language

Language:Slovenian
Keywords:žlindra, alumosilikatni materiali, kemijska reaktivnost, hladna utrditev, alkalijska aktivacija, testiranje izlužkov, odprti dostop


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