The effect of the modification of graphene oxide with γ-aminopropyltriethoxysilane (KH550) on the properties and hydration of cement

In this study, the effect of the incorporation of GO and KH550 modified GO(MGO) on the microstructure, mechanical properties and hydration process of the cement-based composites has been discussed. It is observed that the MGO surface is grafted with the functional groups, which reduce the interlayer force, thus, the dispersibility in the cement paste is improved. In addition, compared with GO, the addition of MGO can further promote the hydration of cement, and optimize the content of the various hydration products owing to no impact on the types of the hydration products, thus, make the microstructure of the cement more uniform. At the same time, the incorporation of MGO can refine the CH crystal size, reduce the total porosity of the cement material, and promote the conversion of harmful pores to harmless pores, thus, making the cement-based materials more compact and effectively improving the mechanical properties.

Automated summary

This study discusses the effect of incorporating graphene oxide (GO) and KH550 modified graphene oxide (MGO) on the microstructure, mechanical properties, and hydration process of cement-based composites. The results show that the surface of MGO is grafted with functional groups, which improves its dispersibility in cement paste. Furthermore, the addition of MGO promotes cement hydration even more than GO, resulting in a more uniform microstructure. The inclusion of MGO also refines the crystal size of hydrated calcium hydroxide (CH), reduces total porosity, and transforms harmful pores to harmless ones, thus enhancing the compactness and mechanical properties of cement-based materials.