Becker F, Götz-Neunhoeffer F, Neubauer J (2026)
Publication Type: Journal article
Publication year: 2026
Book Volume: 204
Article Number: 108191
DOI: 10.1016/j.cemconres.2026.108191
AbstractThe hydration of C3S with anhydrite and hydratable alumina was studied with heat flow calorimetry, XRD, and pore solution analysis. Two mixtures that would form predominantly monosulfate or ettringite along with straetlingite as predicted by thermodynamic modeling were selected. Additionally, an Al-rich mixture was chosen to show the effect of an aluminum surplus on C3S reaction. The hydration of these mixtures was analyzed and compared with the predicted phase assemblages from thermodynamic modeling. The results revealed the rapid formation of high amounts of ettringite in all systems. Throughout the hydration, the high ettringite supersaturation in close proximity to its solubility curves resulted in pore solution compositions kinetically favoring ettringite precipitation within the first 24 h. Resultant ion concentrations inhibited the formation of monosulfate due to its undersaturation. Simultaneously, an amorphous C-A-S-H phase, thermodynamically similar to zeolite_P(Ca), is expected to form until its undersaturation can lead to the formation of straetlingite.
APA:
Becker, F., Götz-Neunhoeffer, F., & Neubauer, J. (2026). Hydration of C3S in anhydrite and hydratable alumina mixtures: Insights into experimental and thermodynamic phase development. Cement and Concrete Research, 204. https://doi.org/10.1016/j.cemconres.2026.108191
MLA:
Becker, Franz, Friedlinde Götz-Neunhoeffer, and Jürgen Neubauer. "Hydration of C3S in anhydrite and hydratable alumina mixtures: Insights into experimental and thermodynamic phase development." Cement and Concrete Research 204 (2026).
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