Graphene oxide (GO) has been utilized to strengthen composite materials. In this study, the effects of GO on hydration degrees, macro-mechanical strength and calcium-silicate-hydrate (C-S-H) structure of cement based composites were investigated through comprehensive experimental tests. In addition, the aggregation mechanism of GO was verified by alkaline solution simulations, using Ca(OH)₂ and NH₃·H₂O. Based on the experimental results, it was found that the 3-day and 7-day compressive strengths of cement based composites with 0.2 wt% of GO were increased by 35.7% and 42.3%, respectively as compared to the control. Moreover, the C-S-H structure of cement paste with GO was not observed to have undergone any change via qualitative and quantitative analyses combined with FT-IR, XRD and ²⁹Si-NMR. Besides, the test results of TGA, DTG and ²⁹Si-NMR showed that the hydrated degree of cement paste increased to 10.4% at 28 days when incorporating with 0.1% of GO.

氧化石墨烯（GO）已用于增强复合材料。在这项研究中，通过全面的实验测试，研究了GO对水泥基复合材料的水合度，宏观机械强度和硅酸钙水合物（CSH）结构的影响。另外，使用Ca（OH）₂和NH ₃ ·H ₂通过碱性溶液模拟验证了GO的聚集机理。O.基于实验结果，发现具有0.2wt％GO的水泥基复合材料的3天和7天抗压强度与对照相比分别增加了35.7％和42.3％。此外，结合FT-IR，XRD和²⁹ Si-NMR进行定性和定量分析，未观察到具有GO的水泥浆的CSH结构发生任何变化。另外，TGA，DTG和²⁹ Si-NMR测试结果表明，当掺入0.1％的GO时，水泥浆的水合度在28天时增加到10.4％。