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Study of processes taking place during carbonation of ladle furnace slag
Sadílek, Lukáš ; Cába, Vladislav (referee) ; Másilko, Jiří (advisor)
This bachelor’s thesis is focused on the study of processes taking place during carbonation of ladle furnace slag (LFS). The main phases of the LFS, meaning -C2S, -C2S, C4AF, C12A7 and additionally -C2S were first synthesized in a pure form. Then all the samples, including the LFS, were studied for hydration and carbonation activity. The highest hydration activity was observed in the aluminate phases C4AF, C12A7 and the highest carbonation activity was exhibited mainly by -C2S then also -C2S and LFS. Main products forming during the carbonation are carbonates, meaning CaCO3 in various modifications but also a smaller amount of aluminate phase hydration products formed in a very quick reaction with mixing water. Both temperature and relative humidity have a significant influence on the carbonation process. These conditions affect the carbonation rate itself and relative humidity also changes the ratio of forming CaCO3 modifications, which is most likely due to the changes in the carbonation mechanism.
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