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Title:Influence of microwaves in the early stage of alkali activation on the mechanical strength of alkali-activated materials
Authors:ID Horvat, Barbara (Author)
ID Pavlin, Majda (Author)
ID Ducman, Vilma (Author)
Files:URL URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0272884222045461?via%3Dihub
 
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Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract:This study focuses on the influence of microwave irradiation dosimetry on alkali-activated slurry in its early stages. The impact on the chemistry and mineralogy along with the mechanical properties were evaluated by changing the power of microwaves and their duration of exposure. This influenced the dissolution of amorphous content, diffusion, and self-assembly into an aluminosilicate network. The precursors used in this study were metakaolin, a non-waste material commonly used in geopolymerisation technology, and local fly ash and ladle furnace slag as secondary materials. Furthermore, they were chemically and mineralogically analysed, and their mixtures with NaOH and Na-water glass provided the optimal ratio of the amount of elements obtained using the pre-calculation approach. However, the potential extra addition of water was experimentally determined to allow complete wetting of the material and solid workability during moulding. Using Fourier-transform infrared spectroscopy, the influence of water was further investigated in alkali-activated slag and fly ash irradiated with microwaves, which resulted in the highest values of mechanical strength in the dosimetry-mapping part of the analysis. In addition to the time dependence of the expected mechanical strength on the ageing of the alkali- activated material, the synthesised material exhibited a significant dependence on the dose of microwave irra- diation, which was different for every precursor as well as every mixture with different chemistries.
Keywords:odpadni material, alkalijska aktivacija, obsevanje z mikrovalovi, mehanska trdnost, waste material, alkali activation, microwave irradiation, mechanical strength
Publication status:Published
Publication version:Version of Record
Publication date:14.12.2023
Publisher:Ceramurgica s.p.a.
Year of publishing:2023
Number of pages:str. 24246-24258
Numbering:part B, iss. 14
PID:20.500.12556/DiRROS-16697 New window
UDC:620.1/.2
ISSN on article:0272-8842
DOI:10.1016/j.ceramint.2022.12.133 New window
COBISS.SI-ID:134219267 New window
Copyright:© 2023 The Authors. Published by Elsevier Ltd
Note:Available online 14 December 2022;
Publication date in DiRROS:12.07.2023
Views:934
Downloads:667
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HORVAT, Barbara, PAVLIN, Majda and DUCMAN, Vilma, 2023, Influence of microwaves in the early stage of alkali activation on the mechanical strength of alkali-activated materials. Ceramics international [online]. 2023. Vol. part B, no. 14, p. 24246–24258. [Accessed 19 March 2025]. DOI 10.1016/j.ceramint.2022.12.133. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=16697
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Record is a part of a journal

Title:Ceramics international
Shortened title:Ceram. int.
Publisher:Ceramurgica s.p.a.
ISSN:0272-8842
COBISS.SI-ID:5822215 New window

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:J2-3035
Name:Sinteza alkalijsko aktiviranih materialov s pomočjo mikrovalov
Funder:ARRS - Slovenian Research Agency
Project number:Z2-3199
Name:Imobilizacija in izluževanje škodljivih elementov v sledovih iz alkalijsko aktiviranih materialov pripravljenih iz lokalno pridobljenih odpadnih in stranskih produktov
Funder:ARRS - Slovenian Research Agency
Project number:P2-0273
Name:Gradbeni objekti in materiali

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:14.01.2023
Applies to:Text and Data Mining valid from 2023-07-01 Version of Record valid from 2023-01-14

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