| Title: | Particle size manipulation as an influential parameter in the development of mechanical properties in electric arc furnace slag-based AAM |
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| Authors: | ID Traven, Katja (Author)
ID Češnovar, Mark (Author)
ID Ducman, Vilma (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0272884219321212?via%3Dihub
 PDF - Presentation file, download (2,26 MB)
MD5: FA9526B63E2D57E5FE7D38AAD05C9211
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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 (AAM) have gained recognition as a promising alternative to technical ceramic and building materials owing to the lower energy demands for production and the potential to use slag as a precursor. In the present study, five sets of slag-based AAM pastes were prepared with different particle sizes (fractions d < 63, 63 < d < 90, and 90 < d < 125 μm in different mass ratios) under the same curing regime and using a fixed precursor to activator (water) mass ratio. Precursors and the hardened AAM are evaluated using BET, XRD, XRF, SEM, FTIR, reactivity of precursors by leaching, and mercury intrusion porosimetry (MIP). Chemical analysis indicated only marginal differences among the different-sized fractions of input materials, whereas the BET surface area and reactivity among the precursors differed significantly-smaller particles had the largest surface area, and thus, higher reactivity. The mineralogical differences between the precursors and hardened AAM were negligible. The results revealed that compressive strength was significantly influenced by particle size, i.e., a threefold increase in strength when the particle size was halved. Microstructural evaluation using MIP confirmed that the porosity was the lowest in AAM with the smallest particle size. The low porosity and high reactivity of the fine fractions led to the highest compressive strength, confirming that manipulation of particle size can significantly influence the mechanical properties. |
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| Keywords: | alkalijsko aktivirani materiali, žlindra iz obločne peči, mehanska aktivacija, mehanske lastnosti, poroznost, alkali-activated materials (AAM), electric arc furnace steel slag, mechanical activation, mechanical properties, porosity |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 26.07.2019 |
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| Publisher: | Ceramurgica s.p.a. |
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| Year of publishing: | 2019 |
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| Number of pages: | str. 22632-22641 |
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| Numbering: | Vol. 45, iss. 17 |
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| PID: | 20.500.12556/DiRROS-17304  |
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| UDC: | 620.1/.2 |
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| ISSN on article: | 0272-8842 |
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| DOI: | 10.1016/j.ceramint.2019.07.296 |
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| COBISS.SI-ID: | 2480999 |
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| Copyright: | © 2019 The Authors. Published by Elsevier Ltd. |
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| Note: | E-članek objavljen: 1 December 2019;
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| Publication date in DiRROS: | 22.11.2023 |
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| Views: | 814 |
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| Downloads: | 313 |
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