| Title: | Production of cold-bonded artificial lightweight aggregates from industrial waste via double-step pelletization : feasibility and surface treatment effects |
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| Authors: | ID Raza, Jehangeer (Corresponding author)
ID Tesovnik, Anže (Author)
ID Ducman, Vilma (Author)
ID Colangelo, Francesco (Author)
ID Singh, Narinder (Author)
ID Pavlin, Majda (Author)
ID Tominc, Sara (Author)
ID Farina, Ilenia (Author) |
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| Files: |  URL - Source URL, visit https://doi.org/10.1016/j.ceramint.2026.04.284
 PDF - Presentation file. (3,30 MB, This file will be accessible after 23.04.2028)
MD5: 67D57D7B11C541C63F4164D8BD0933D4
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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: | Recently, the use of recycled materials in the construction and building sector has gained global attention for promoting sustainability. For this purpose, eco-friendly lightweight artificial aggregates (LWA) are a suitable alternative to natural aggregates. Municipal solid waste incineration fly ash (MSWI-FA) (75 wt%, 65 wt%, 55 wt%), marble sludge (MS) (15 wt%, 25 wt%, 35 wt%), and ordinary Portland cement (OPC) (10 wt%) as a binder were used to prepare various mixtures of LWA through the cold bonding pelletization (CBP) process. Before pelletization, the MSWI-FA was pre-treated via a two-step washing with water, which significantly reduced the chloride and sulfate content. To enhance the performance of the aggregates, they were surface treated with a mixture of ground 50% granulated blast furnace slag (GGBFS), 20% silica fume (SF), and 30% OPC via CBP, and these aggregates were named double bonded. Overall, the apparent density of the aggregates ranged from 1.71 to 2.04 g/cm3, while water absorption ranged from 12.87% to 17.12%, and mechanical strength was observed in the range of 1.05 to 2.1 MPa. The DBAs showed improved performance compared to the SBAs. XRD analysis showed the formation of hydration products with poor crystallinity or amorphous structure, as confirmed by FTIR and TG analysis. Leaching analysis showed that most hazardous elements were successfully solidified/stabilized within the aggregate matrix. However, Mo and Sb concentrations exceeded the limits for non-hazardous waste, indicating the need for further optimization of the mixture composition and processing parameters to improve their immobilization. |
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| Keywords: | lightweight aggregates, artificial aggregates, cold-bonded pelletization, municipal solid waste incineration ash |
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| Publication status: | Published |
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| Publication version: | Author Accepted Manuscript |
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| Publication date: | 23.04.2026 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 31723-31737 |
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| Numbering: | Vol. 52, issue 17 |
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| PID: | 20.500.12556/DiRROS-31866  |
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| UDC: | 54 |
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| ISSN on article: | 1873-3956 |
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| DOI: | 10.1016/j.ceramint.2026.04.284 |
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| COBISS.SI-ID: | 276290819 |
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| Note: |
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| Publication date in DiRROS: | 13.08.2026 |
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| Views: | 111 |
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| Downloads: | 21 |
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