Abstract This study reports on the effect of graphene oxide (GO) on the hydration of Portland cement (PC) and industrial clinker. GO accelerates PC hydration, whereas it temporarily retards that of clinker. This difference reflects a twofold behaviour of GO in cement pastes. Retardation is due to the interaction of GO with the surface of hydrating grains, while acceleration results from a seeding effect. Gypsum causes this difference. GO is shown to have little effect on the strength of hardened pastes, and this merely relates to the change of hydration degree, as opposed to reinforcing effect formerly assumed. Overall, GO is not particularly active as a nucleation surface, as it aggregates and behaves in a similar way to inert fillers (e.g. quartz). Polycarboxylate-ether copolymer could make GO an active seed in cement pastes, as it prevents GO from aggregating. Nevertheless, this was found to occur only in alite pastes but not PC pastes.

中文翻译：

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了解氧化石墨烯在波特兰水泥浆中的行为

摘要 本研究报告了氧化石墨烯 (GO) 对硅酸盐水泥 (PC) 和工业熟料水化的影响。GO 加速 PC 水化，而它暂时延缓熟料的水化。这种差异反映了 GO 在水泥浆中的双重行为。延迟是由于 GO 与水合颗粒表面的相互作用，而加速是由于播种效应造成的。石膏导致这种差异。GO 对硬化膏体的强度几乎没有影响，这仅与水化程度的变化有关，与以前假设的增强作用相反。总体而言，GO 作为成核表面并不是特别活跃，因为它以与惰性填料（例如石英）相似的方式聚集和表现。聚羧酸酯-醚共聚物可以使 GO 成为水泥浆中的活性种子，因为它可以防止 GO 聚合。然而，发现这仅发生在 alite 焊膏中，而不发生在 PC 焊膏中。