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 aluminoso
K1 Hidratación
AB The hydration behavior of belite phase in different cements is not well understood. Belite hydrates very slowly but there are reports with faster hydration kinetics. Here, the hydration behavior of belite phase in a commercial belite calcium sulfoaluminate (BCSA) cement has been investigated. The BCSA cement was hydrated with two water-to-cement ratios, 0.50 and 0.65 and at two temperatures, 20 and 40 °C. Studies of calorimetry, NMR, laboratory X-ray powder diffraction (XRPD), thermal analysis (TA) of the pastes, and mass balance calculations have been performed. The calorimetric and LXRPD studies showed that with sufficient water for the hydration reactions to take place, i.e., w/c = 0.65, the degree of reaction of belite is 30% at 7 days and above 60% at 35 days, at 40 °C. The 29Si and 27Al MAS-NMR and TA studies confirmed the reactivity of belite under conditions of sufficient water (thermodynamic requirement) and at high temperature (kinetic requirement). This was demonstrated by the presence of stratlingite by 27Al MAS-NMR and TA. Finally, it was found that ~ 12 mass% of the added water remains unbound, but it is unavailable for the progression of hydration reactions in the studied experimental conditions.
PB Springer Nature
YR 2025
FD 2025-01-15
LK https://hdl.handle.net/10630/36606
UL https://hdl.handle.net/10630/36606
LA eng
NO Pérez-Bravo, R., Koufany, I., Cuesta, A. et al. Reactivity of belite in calcium sulfoaluminate-based cements. J Therm Anal Calorim (2025). https://doi.org/10.1007/s10973-024-13933-8
NO Funding for open access charge: Universidad de Málaga / CBUA
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026