20.500.12556/DiRROS-15886 Influence of alkalis on the phase development of belite-sulfoaluminate clinkers This paper presents a study on the influence of different amounts of alkalis (K2O and Na2O) on clinker phase formation, microstructure, phase composition and reactivity of belite-sulfoaluminate cement clinker. Using X-ray powder diffraction and scanning electron microscopy with energy dispersive spectrometry, it was found that the amount of C2S and C4AF increases with the incorporation of alkalis, while the amount of C4A3Ś and CŚ decreases. In addition to the major phases, the samples with alkalis also consist of minor phases such as C3A (tricalcium aluminate), KŚ (arcanite), and KC2Ś3 (Ca-langbeinite). The major ions in the major phases were substituted by alkali cations and some other ions (Ca2+, Al3+, Fe3+, S2-, S6+, Si4+). The alkalis also affect the microstructure of the clinker, e.g., the shape of the grains. Consequently, isothermal calorimetry was used to detect differences in hydration kinetics. The clinker with 2 wt. % K2O content was the most reactive, while the sample with 0.5 wt. % Na content was the least reactive. The latter was primarily influenced by the content of the main and minor phases of the clinker. BCSA clinker microstrcuture reactivity alkalis open access klinker BCSA mikrostruktura reaktivnost alkalije razvoj odprti dostop true false true Institute of the Chemistry of Glass and Ceramic Materials of the Academy of Sciences of Czech Republic Angleški jezik Slovenski jezik © Ceramics-Silikáty 2022 Neznano 2022-12-06 11:19:00 2022-12-06 11:19:01 2023-05-05 08:37:42 0000-00-00 00:00:00 2022 0 0 Soavtorji: Katarina Šter, Maruša Mrak, Luka Škrlep, Mirijam Vrabec, Sabina Dolenec; str. 527-539 no. 4 vol. 66 2022 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 2022-10-20 548/549 0862-5468 10.13168/cs.2022.0049 130288387 https://www.irsm.cas.cz/materialy/cs_content/2022_doi/Ceplak_CS_2022_0049.pdf 0 17cead9a-754b-11ed-8925-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21007 RAZ_Ceplak_Barbara_2022.pdf RAZ_Ceplak_Barbara_2022.pdf 1 8650027A3C60FD05F22B8FCD937B3B17 d7212b53e5fde6007eb6eb5fa9f37c71f90cbdb03af9d3b5c3943b4f3cb9ddfa 34e3e0b7-754b-11ed-8925-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21008 Geološki zavod Slovenije Zavod za gradbeništvo Slovenije 0 0 0