An investigation is about the role of GO on the dissolution behaviours and hydration process of alite (Fe, F-C 3 S, abb. C 3 S) in a synthetic cement system, which also contains aluminate (Fe, F-C 3 A, abb. C 3 A) and gypsum. The results show that GO can increase the undersaturation levels of starting materials (C 3 S, C 3 A and gypsum) and thus promote their dissolution. The dissolution of C 3 A might be more sensitive than that of C 3 S due to the fluctuation of Ca concentration in pore solution before 30 min. Trace amount of GO could accelerate the interfacial dissolution rate of C 3 S throughout 24 h. As for the precipitation behaviours, GO could increase the supersaturation level of portlandite while decrease that of ettringite and C–S–H. In general, GO can improve the hydration degree of C 3 S by up to 15.0% and accelerate its hydration reaction rate by 33.6%. It is notable that the morphology changes of C–S–H from foil-like for reference to fibrous-like for GO-containing system at 2 h were likely attributed to the supersaturation of portlandite.

中文翻译：

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氧化石墨烯（GO）对合成水泥体系中阿利特水化和溶解的影响

一项关于 GO 对合成水泥体系中 alite (Fe, FC 3 S, abb. C 3 S) 溶解行为和水化过程的作用的研究，该体系还含有铝酸盐 (Fe, FC 3 A, abb. C) 3 A) 和石膏。结果表明，GO 可以增加起始材料（C 3 S、C 3 A 和石膏）的不饱和水平，从而促进它们的溶解。由于 30 分钟前孔隙溶液中 Ca 浓度的波动，C 3 A 的溶解可能比 C 3 S 的溶解更敏感。微量的 GO 可以在 24 小时内加速 C 3 S 的界面溶解速率。至于沉淀行为，GO 可以增加硅酸盐的过饱和度，同时降低钙矾石和 C-S-H 的过饱和度。一般来说，GO可以将C 3 S的水合度提高多达15。0%，使其水化反应速率提高33.6%。值得注意的是，在 2 小时后，C-S-H 从箔状到含 GO 系统的纤维状的形态变化可能归因于硅酸盐的过饱和。