The interactions between graphene oxide (GO) and individual clinker phases, which are critical for understanding the mechanism of GO during the hydration of cementitious materials, remain unclear. Therefore, this study investigated the effect of GO on the thermodynamic-based solution chemistry and hydration of tricalcium aluminate (C₃A), which is a main constituent phase of Portland cement, in the presence of gypsum. The pore solution composition, phase content, and morphology of C₃A/GO/gypsum composites were studied by inductively coupled plasma optical emission spectroscopy, X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy. The experimental results showed that the incorporation of GO led to Ca²⁺ adsorption, which particularly decreased the local Ca²⁺ concentration near the surface of C₃A. This increased the undersaturation levels of C₃A and gypsum, thus facilitating their dissolution. A lower Ca²⁺ concentration led to a slight decrease in the supersaturation of hydrates after GO addition. Nevertheless, the introduction of GO improved the overall hydration degree, as confirmed by quantitative X-ray diffraction and thermogravimetric analysis. This improvement can be probably attributed to the higher number of nucleation sites provided by GO for precipitation. In addition, the scanning electron microscopy images of C₃A/gypsum paste showed a cluster-like structure composed of coarse needle-like ettringites.

氧化石墨烯（GO）和各个熟料相之间的相互作用对于理解胶凝材料水化过程中的GO机理至关重要，目前尚不清楚。因此，本研究研究了在石膏存在下，GO对基于热力学的溶液化学和铝酸三钙（C ₃ A）水合的影响，铝酸三钙是硅酸盐水泥的主要组成相。通过电感耦合等离子体发射光谱，X射线衍射，热重分析和扫描电子显微镜研究了C ₃ A / GO /石膏复合材料的孔溶液组成，相含量和形貌。实验结果表明，GO的引入导致Ca ²⁺吸附，特别是降低了C ₃ A表面附近的局部Ca ²⁺浓度。这增加了C ₃ A和石膏的不饱和度，从而促进了它们的溶解。加入GO后，较低的Ca ²⁺浓度导致水合物的过饱和度略有降低。尽管如此，通过定量X射线衍射和热重分析证实，GO的引入改善了整体水合度。这种改善可能归因于GO为沉淀提供的成核位点数量增加。另外，C ₃的扫描电子显微镜图像石膏糊显示出由粗针状钙矾石组成的簇状结构。