20.500.12556/DiRROS-16159 The influence of calcium sulfate content on the hydration of belite-calcium sulfoaluminate cements with different clinker phase compositions The influence of different amounts of gypsum on the hydration of a belite-rich and a yeʼelimite-rich belite-calcium sulfoaluminate clinker (BCSA) was investigated. The hydration kinetics, phase assemblages and compressive strength development of cements prepared using yeʼelimite/ calcium sulfate molar ratios of 1, 1.5 and 2 were studied. Besides ettringite and monosulfate, aluminium hydroxide, strätlingite, C-S-H, iron-containing siliceous hydrogarnet and hydrotalcite were present as hydration products. Increasing the amount of gypsum increased the ratio of ettringite to monosulfate formed in the cement paste, lowered the amount of pore solution, delayed the dissolution of belite and ferrite, decreased the formation of strätlingite and, in the case of the yeʼelimite-rich BCSA, led to an increase in compressive strength. Increased amounts of belite in the clinker led to the formation of higher quantities of C-S-H, at the expense of straätlingite and a lower compressive strength, as belite has a lower degree of reaction than yeʼelimite and due to the formation of more C-S-H and stratlingite compared to the more space-filling ettringite. The thermodynamic model established for BCSA cement hydration agrees well with the experimental data. Compressive strength directly correlated with bound water from thermogravimetric analyses and inversely correlated with the porosity calculated from thermodynamic modelling. belite-calcium sulfoaluminate cement gypsum hydration thermodynamic modelling belitno-kalcijevo sulfoaluminatni cement sadra hidratacija termodinamsko modeliranje true false true Springer Netherlands Angleški jezik Slovenski jezik © The Author(s) 2021 Neznano 2023-01-30 08:10:29 2023-07-28 09:42:12 2023-07-29 03:35:22 0000-00-00 00:00:00 2021 0 0 Article no.: 212; str. 1-17 Vol. 54 Nov. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2021-11-05 620.1/.2 1871-6873 10.1617/s11527-021-01811-w 84002051 RAZ_Mrak_Marusa_2021.pdf RAZ_Mrak_Marusa_2021.pdf 1 559FD40D758525FFB3E785B1A3C264E5 f42070785418c8999ca29f1ea453fc18f890eb923d9d9cb4a27937590e17ed7e d45cd093-a06d-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21525 11527_2021_1811_MOESM1_ESM.docx 11527_2021_1811_MOESM1_ESM.docx 1 AA5FFA8F05FA92E3446E90E1F4D0C891 181bbd81dc91fafa499a1f53599b6bba0be82d2fd3f29c6209a51d06d8e5be77 5506386f-2d06-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22762 http://dx.doi.org/10.1617/s11527-021-01811-w 0 3becf089-2d06-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22761 Zavod za gradbeništvo Slovenije 0 0 0