2026-06-01T05:44:35Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/198382026-02-03T11:05:22Zcom_10630_2254col_10630_37953

Zhao, Piqi Bao, Xingyuan Chen, Heng Wang, Shoude Lu, Lingchao Gómez-de-la-Torre, María de los Ángeles Cheng, Xin 2020-09-28T19:48:12Z 2020-09-28T19:48:12Z 2020-09-28 https://hdl.handle.net/10630/19838 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. eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Attribution-NonCommercial-NoDerivatives 4.0 Internacional Hidratación Sulfatos minerales Hydration mechanisms of Ba-doped ye’elimite: effect of Ba/Ca ratio on hydration behavior journal article