2026-06-06T03:55:52Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/198382026-02-03T11:05:22Zcom_10630_2254col_10630_37953
Hydration mechanisms of Ba-doped ye’elimite: effect of Ba/Ca ratio on hydration behavior
Zhao, Piqi
Bao, Xingyuan
Chen, Heng
Wang, Shoude
Lu, Lingchao
Gómez-de-la-Torre, María de los Ángeles
Cheng, Xin
Hidratación
Sulfatos minerales
Manuscrito revisado de los autores, aceptado y finalmente publicado en: Construction and Building Materials 264 (2020) 120258), con DOI: https://doi.org/10.1016/j.conbuildmat.2020.120258
Than stoichiometric one. However, the hydration mechanism is not well understood, in particular for the
effect of Ba/Ca ratio on hydration behavior. To shed light on this issue, high purity C4-xBxA3$ samples with
designed element compositions (C4A3$, C3.5B0.5A3$, and C3BA3$) were prepared and their hydration processes
were investigated. The results reveal that Ba-doped ye’elimite reacts faster than the stoichiometric
ye’elimite. With the increase of Ba/Ca ratio, it can gradually increase the intensity of the initial peak,
shorten the dormant period and reduce the total hydration heat. The phase composition evolution based
on Rietveld/XRD method demonstrates that the dissolution rate of the C3.5B0.5A3$ and C3BA3$ are about
19% and 28% higher than that of C4A3$ in 6h. Moreover, the hydration sequences and main products varied
significantly. The AFt is absent for the system with barium incorporation and AFm tends to be less
with the increase of Ba/Ca ratio. This paper also proposes a new acceleration mechanism of Ba-doped
ye’elimite. It is summarized as a higher rate of dissolution-precipitation reaction stemmed from higher
ion precipitation of BaSO4 and a combination of extra surface for the nucleation sites provided by BaSO4.
2020-09-28T19:48:12Z
2020-09-28T19:48:12Z
2020-09
2020-09-28
journal article
https://hdl.handle.net/10630/19838
https://doi.org/10.1016/j.conbuildmat.2020.120258
eng
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Attribution-NonCommercial-NoDerivatives 4.0 Internacional