氧化石墨烯改善高贝利特水泥性能的研究

Study on the improvement of properties of high belite cement by adding graphene oxide

试验研究了不同掺量的氧化石墨烯(GO)对高贝利特水泥(HBC)材料流动度、强度、水化热和微观结构的影响.结果表明:水泥胶砂流动度随着GO掺量的增加而降低;单掺GO对试件各龄期强度的增强效果不明显,而复掺PC/GO可明显提高试件各龄期的强度,且当GO掺量为0.05%时,试件各龄期的抗折强度和抗压强度均达到最佳,与基准试件相比,其强度得到明显提高;同时GO对水泥各龄期的水化热还有降低作用.由SEM、XRD分析表明,掺入GO可提高水泥材料的密实度,促进水化产物(C-S-H)和钙矾石AFt的形成,从而达到增强效果.

The effects of different amount of graphene oxide （GO） on fluidity, strength, hydration heat and mierostrueture of the high belite cement （HBC） materials were analyzed in this paper. The experimental results showed that the fluidity of cement mortar decreased with the increase of GO addition, when GO added alone, it was not obvious to improve specimens＇ strength, and compared with the reference specimens, adding PC/GO could obviously enhance the strength of specimens at each age ; and when the addition of GO was 0.05%, its flexural strength and compressive strength reached the optimum. Meanwhile, GO could also decrease the hydration heat of the specimens at each age. The SEM and XRD showed that the incorporation of GO could increase the density of the material and promote the formation of hydration products C-S-H and AFt , which was to improve its strength.