| Title: | Aggregates obtained by alkali activation of fly ash : the effect of granulation, pelletization methods and curing regimes |
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| Authors: | ID Rudić, Ognjen Lj. (Author)
ID Ducman, Vilma (Author)
ID Malešev, Mirjana (Author)
ID Radonjanin, Vlastimir (Author)
ID Draganić, Suzana (Author)
ID Šupić, Slobodan (Author)
ID Radeka, Miroslava (Author) |
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| Files: |  URL - Source URL, visit https://www.mdpi.com/1996-1944/12/5/776
 PDF - Presentation file, download (5,27 MB)
MD5: 1AE1308E6B576527101C9729EABE7E91
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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: | This paper presents results regarding the phase composition, microstructure and textural properties of two types of aggregates, which were prepared via crushing or pelletization of alkali-activated Class F fly ash and cured under different conditions. The alkali activator was the same for aggregate products, containing an alkaline solution consisting of 8 M NaOH and Na-silicate (8 M NaOH/Na-silicate = 1:2.5 mass ratio). The aforementioned properties were influenced by two different preparation procedures combined with varying curing regimes (under normal conditions at 20 %C, RH 40%60% for 28 and 120 days and under an accelerated regime, at 65 %C for 5 days). Aggregates were characterized using X-ray diffraction (XRD), Fourier-transform transmission infrared spectroscopy (FTIR), back scattered electron microscopy with energy dispersive spectrometer (BSE-EDS) analyses and mercury intrusion porosimetry (MIP). The results showed noteworthy structural and textural diversities between the two types of aggregate. The method of preparation and curing regime affected the formation of the N-A-S-H structure and the texture of the alkali-activated fly ash product, with the crushing method giving an advantage |
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| Keywords: | alkali activation, agregat, FTIR |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 06.03.2019 |
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| Publisher: | Molecular Diversity Preservation International |
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| Year of publishing: | 2019 |
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| Number of pages: | str. 1-22 |
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| Numbering: | Vol. 12, no. 5 |
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| PID: | 20.500.12556/DiRROS-16967  |
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| UDC: | 620.1/.2 |
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| ISSN on article: | 1996-1944 |
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| DOI: | 10.3390/ma12050776 |
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| COBISS.SI-ID: | 2432615 |
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| Copyright: | © 2019 by the authors. Licensee MDPI, Basel, Switzerland. |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 6. 3. 2019;
Številka članka : 776;
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| Publication date in DiRROS: | 14.09.2023 |
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| Views: | 611 |
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| Downloads: | 347 |
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