| Title |
Thermal stability assessment of calcium monosulfoaluminate 12-hydrate by applying the in-situ X-ray diffraction method at 25-1250 °C / |
| Authors |
Rubinaite, Dovile ; Dambrauskas, Tadas ; Baltakys, Kestutis ; Hilbig, Harald ; Siauciunas, Raimundas |
| DOI |
10.1038/s41598-023-30919-y |
| Full Text |
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| Is Part of |
Scientific reports.. Berlin : Nature portfolio. 2023, vol. 13, iss. 1, art. no. 3782, p. 1-11.. ISSN 2045-2322. eISSN 2045-2322 |
| Abstract [eng] |
In this study, the stability of synthetic calcium monosulfoaluminate and the reaction mechanism of its conversion into ye`elimite during the thermal treatment were examined. The monosulfoaluminate was produced referring to ye`elimite stoichiometry by applying the mechanochemical treatment (dry grinding at 900 rpm with 3 on-off cycles of 10 min) followed by the hydrothermal synthesis (for 8 h at 110 °C). The data indicated that the prepared sample consists of Ms12 (~ 54.8%), CaCO3 (~ 1.9%), Ms10.5/Hc (~ 0.7%) and amorphous content (~ 42.6%). Meanwhile, the thermal stability assessment by in-situ XRD analysis reveals that the dehydration of monosulfoaluminate interlayer water proceeds at 25-370 °C, where four different hydration states of monosulfoaluminate are identified. Additionally, the results suggest that the removal of water molecules from the main (octahedral) layers begins at ~ 200 °C. Finally, at 700-1250 °C, the solid-state reactions between CŜ, CA and CaO are observed, generating the formation of ye`elimite. |
| Published |
Berlin : Nature portfolio |
| Type |
Journal article |
| Language |
English |
| Publication date |
2023 |
| CC license |
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