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Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/ED5CE9B4-86B2-4178-9AE9-97907967B2AD | ||
| Year | 2019 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | E. Petrakis, V. Karmali, G. Bartzas and K. Komnitsas, "Grinding kinetics of slag and effect of final particle size on the compressive strength of alkali-activated materials," Minerals, vol. 9, no. 11, pp. 1-21, Nov. 2019. doi: 10.3390/min9110714 https://doi.org/doi:10.3390/min9110714 | ||
| Appears in Collections |
This study aims to model grinding of a Polish ferronickel slag and evaluate the particle size distributions (PSDs) of the products obtained after different grinding times. Then, selected products were alkali-activated in order to investigate the effect of particle size on the compressive strength of the produced alkali-activated materials (AAMs). Other parameters affecting alkali activation, i.e., temperature, curing, and ageing time were also examined. Among the different mathematical models used to simulate the particle size distribution, Rosin–Rammler (RR) was found to be the most suitable. When piecewise regression analysis was applied to experimental data it was found that the particle size distribution of the slag products exhibits multifractal character. In addition, grinding of slagexhibits non-first-order behavior and the reduction rate of each size is time-dependent. The grinding rate and consequently the grinding efficiency increases when the particle size increases, but drops sharply near zero after prolonged grinding periods. Regarding alkali activation, it is deduced that among the parameters studied, particle size (and the respective specific surface area) of the raw slag product and curing temperature have the most noticeable impact on the compressive strength of the produced AAMs.
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