| Title: | Mechanical, microstructural and mineralogical evaluation of alkali-activated waste glass and stone wool |
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| Authors: | ID Pavlin, Majda (Author)
ID Horvat, Barbara (Author)
ID Frankovič, Ana (Author)
ID Ducman, Vilma (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0272884221004168
 PDF - Presentation file, download (9,79 MB)
MD5: 458DA2202F83FEF33A960A267321C444
 DOCX - Supplement, download (612,85 KB)
MD5: 57C337F3A3807AAF0C96C4D0C2359468
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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: | Mineral waste wool represents a significant part of construction and demolition waste (CDW) not yet being successfully re-utilized. In the present study, waste stone wool (SW) and glass wool (GW) in the form received, without removing the binder, were evaluated for their potential use in alkali activation technology. It was confirmed that both can be used in the preparation of alkali-activated materials (AAMs), whether cured at room temperature or at an elevated temperature in order to speed up the reaction. The results show that it is possible to obtain a compressive strength of over 50 MPa using SW or GW as a precursor. A strength of 53 MPa was obtained in AAM based on GW after curing for 3 days at 40 °C, while a similar compressive strength (58 MPa) was achieved after curing the GW mixture for 56 days at room temperature. In general, the mechanical properties of samples based on GW are better than those based on SW. The evolution of mechanical properties and recognition of influential parameters were determined by various microstructural analyses, including XRD, SEM, MIP, and FTIR. The type of activator (solely NaOH or a combination of NaOH and sodium silicate), and the SiO2/Na2O and liquid to solid (L/S) ratios were found to be the significant parameters. A lower SiO2/Na2O ratio and low L/S ratio significantly improve the mechanical strength of AAMs made from both types of mineral wool. |
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| Keywords: | alkali activation, waste mineral wool, mechanical strength |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 06.02.2021 |
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| Publisher: | Ceramurgica s.p.a. |
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| Year of publishing: | 2021 |
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| Number of pages: | str. 15102-15113 |
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| Numbering: | 47 |
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| PID: | 20.500.12556/DiRROS-16162  |
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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.2021.02.068 |
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| COBISS.SI-ID: | 50723075 |
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| Copyright: | © 2021 The Authors. Published by Elsevier Ltd. |
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| Note: | E-članek objavljen: 15 February 2021;
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| Publication date in DiRROS: | 31.07.2023 |
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| Views: | 629 |
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| Downloads: | 545 |
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