RT Journal Article
T1 Reactivity of belite in calcium sulfoaluminate‑based cements
A1 Pérez-Bravo, Raquel
A1 Koufany, Imane
A1 Cuesta, Ana
A1 Bescher, Eric P.
A1 García-Aranda, Miguel Ángel
A1 Santacruz-Cruz, María Isabel
A1 Gómez-de-la-Torre, María de los  Ángeles
K1 Cemento
AB The hydration behavior of belite phase in different cements is not well understood. Belite hydrates very slowly but there arereports with faster hydration kinetics. Here, the hydration behavior of belite phase in a commercial belite calcium sulfoalumi-nate (BCSA) cement has been investigated. The BCSA cement was hydrated with two water-to-cement ratios, 0.50 and 0.65and at two temperatures, 20 and 40 °C. Studies of calorimetry, NMR, laboratory X-ray powder diffraction (XRPD), thermalanalysis (TA) of the pastes, and mass balance calculations have been performed. The calorimetric and LXRPD studies showedthat with sufficient water for the hydration reactions to take place, i.e., w/c = 0.65, the degree of reaction of belite is 30% at7 days and above 60% at 35 days, at 40 °C. The 29 Si and 27 Al MAS-NMR and TA studies confirmed the reactivity of beliteunder conditions of sufficient water (thermodynamic requirement) and at high temperature (kinetic requirement). This wasdemonstrated by the presence of stratlingite by 27 Al MAS-NMR and TA. Finally, it was found that ~ 12 mass% of the addedwater remains unbound, but it is unavailable for the progression of hydration reactions in the studied experimental conditions.
PB Springer
YR 2025
FD 2025
LK https://hdl.handle.net/10630/37324
UL https://hdl.handle.net/10630/37324
LA eng
NO R. Pérez-Bravo, I. Koufany, A. Cuesta, E.P. Bescher, M.A.G. Aranda, I. Santacruz, A.G. De la Torre, Reactivity of belite in calcium sulfoaluminate-based cements, Journal of Thermal Analysis and Calorimetry 2025 (2025) 1–12. https://doi.org/10.1007/S10973-024-13933-8.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 22 ene 2026