20.500.12556/DiRROS-16697 Influence of microwaves in the early stage of alkali activation on the mechanical strength of alkali-activated materials 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. odpadni material alkalijska aktivacija obsevanje z mikrovalovi mehanska trdnost waste material alkali activation microwave irradiation mechanical strength true false true Ceramurgica s.p.a. Angleški jezik Ni določen © 2023 The Authors. Published by Elsevier Ltd Neznano 2023-07-12 10:26:56 2023-07-12 10:48:32 2023-07-14 11:16:03 0000-00-00 00:00:00 2023 0 0 Available online 14 December 2022; str. 24246-24258 iss. 14 part B 2023 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 2023-12-14 620.1/.2 0272-8842 10.1016/j.ceramint.2022.12.133 134219267 https://www.sciencedirect.com/science/article/pii/S0272884222045461?via%3Dihub 1 17325b7e-207d-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22666 RAZ_Horvat_Barbara_2023.pdf RAZ_Horvat_Barbara_2023.pdf 1 8BACCB8511E495DDA1694878EC6727C4 bfe36e0d4c98883346157d055c33205ec42528aa15d2e7aa8d21c2dba7c549b2 0a91cf94-2080-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22667 RAZ_Horvat_Barbara_2023.docx RAZ_Horvat_Barbara_2023.docx 1 6F596005DD1D92CE811446B29FCC4CCC 548ae66fcce0b6725be11d93064360b92acab1ece801c9ec1b38bf3ccc264857 14c8188c-2080-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22668 Zavod za gradbeništvo Slovenije 0 0 0