RT Journal Article
T1 Hydration mechanisms of Ba-doped ye’elimite: effect of Ba/Ca ratio on hydration behavior
A1 Zhao, Piqi
A1 Bao, Xingyuan
A1 Chen, Heng
A1 Wang, Shoude
A1 Lu, Lingchao
A1 Gómez-de-la-Torre, María de los  Ángeles
A1 Cheng, Xin
K1 Hidratación
K1 Sulfatos minerales
AB Than stoichiometric one. However, the hydration mechanism is not well understood, in particular for theeffect of Ba/Ca ratio on hydration behavior. To shed light on this issue, high purity C4-xBxA3$ samples withdesigned element compositions (C4A3$, C3.5B0.5A3$, and C3BA3$) were prepared and their hydration processeswere investigated. The results reveal that Ba-doped ye’elimite reacts faster than the stoichiometricye’elimite. With the increase of Ba/Ca ratio, it can gradually increase the intensity of the initial peak,shorten the dormant period and reduce the total hydration heat. The phase composition evolution basedon Rietveld/XRD method demonstrates that the dissolution rate of the C3.5B0.5A3$ and C3BA3$ are about19% and 28% higher than that of C4A3$ in 6h. Moreover, the hydration sequences and main products variedsignificantly. The AFt is absent for the system with barium incorporation and AFm tends to be lesswith the increase of Ba/Ca ratio. This paper also proposes a new acceleration mechanism of Ba-dopedye’elimite. It is summarized as a higher rate of dissolution-precipitation reaction stemmed from higherion precipitation of BaSO4 and a combination of extra surface for the nucleation sites provided by BaSO4.
YR 2020
FD 2020-09-28
LK https://hdl.handle.net/10630/19838
UL https://hdl.handle.net/10630/19838
LA eng
NO 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
NO This work is supported by the National Key Research and DevelopmentPlan of China (No. 2018YFD1101003 and No.2016YFB0303505), National Natural Science Foundation of China(No. U1806222, 51602126, and 51761145023), Key Laboratory ofAdvanced Civil Engineering Materials (Tongji University), Ministry of Education (202001), the Taishan Scholars Program, Case-by-Case Project for Top Outstanding Talents of Jinan, Youth Innovation Support Program of Shandong Colleges and Universities (2019KJA017),State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology) (No. SYSJJ2018-12).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 24 ene 2026