| Title: | The preparation and characterization of low-temperature foams based on the alkali activation of waste stone wool |
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| Authors: | ID Pavlin, Majda (Author)
ID Horvat, Barbara (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/S0272884222007830?via%3Dihub
 PDF - Presentation file, download (9,47 MB)
MD5: FCC605EC914C240D862447F38F39D072
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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: | Waste mineral wool represents a huge amount of construction and demolition waste that is still not adequately returned into the value chain but needs to be landfilled. In the present study, waste stone wool (SW) was evaluated for the preparation of alkali-activated foams. For this purpose SW was milled and sieved below 63 μm, then the activator (sodium silicate) and different amounts of foaming agent (hydrogen peroxide, H2O2), varying between 1 wt% and 3 wt%, were added to the slurry and cured in moulds at an elevated temperature (70 ◦ C) for three days. In this way, foamed, highly porous materials were obtained whose density and mechanical properties were influenced by the amount of foaming agent used. The densities obtained ranged between 1.4 and 0.5 g/cm3, with corresponding mechanical properties of between 12.6 and 1.5 MPa and total porosities in the range 37.8–78.6%, respectively. In the most porous samples with the total porosity of 78.6%, a thermal conductivity of 0.092 W/(m∙K) was confirmed. The study confirmed the suitability of waste mineral wool (in our case SW) as a precursor for alkali-activated foams with potential use in the construction sector or other industrial applications. |
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| Keywords: | alkali activation, waste mineral wool, mechanical strength, open access, alkalijska aktivacija, odpadna volna, SEM, XRF, XRD, mehanska trdnost, odprti dostop |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 11.03.2022 |
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| Publisher: | Ceramurgica s.p.a. |
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| Year of publishing: | 2022 |
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| Number of pages: | str. 1-38 |
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| PID: | 20.500.12556/DiRROS-15830  |
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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.2022.03.037 |
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| COBISS.SI-ID: | 100944387 |
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| Copyright: | © 2022 The Author(s). Published by Elsevier Ltd |
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| Publication date in DiRROS: | 19.06.2023 |
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| Views: | 265 |
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| Downloads: | 204 |
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