| Title: | Alkali activation of metallurgical slags : reactivity, chemical behavior, and environmental assessment |
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| 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) |
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| Files: |  URL - Source URL, visit https://www.mdpi.com/1996-1944/14/3/639
Description: Open access
 PDF - Presentation file, download (4,49 MB)
MD5: B079326BF7836ED56FB673476DE83E5C
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
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| 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. |
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| Keywords: | slag, aluminosilicate materials, chemical reactivity, cold consolidation, alkali activation, leaching test, open access |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 30.01.2021 |
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| Publisher: | Molecular Diversity Preservation International |
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| Year of publishing: | 2021 |
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| Number of pages: | str. 1-19 |
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| Numbering: | Vol. 14, iss. 3 |
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| PID: | 20.500.12556/DiRROS-16244  |
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| UDC: | 620.1/2 |
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| ISSN on article: | 1996-1944 |
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| DOI: | 10.3390/ma14030639 |
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| COBISS.SI-ID: | 49408515 |
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| Copyright: | © 2021 by the authors.
Licensee MDPI, Basel, Switzerland. |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 14. 1. 2021;
Št. članka 639;
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| Publication date in DiRROS: | 22.05.2023 |
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| Views: | 654 |
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| Downloads: | 360 |
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