In-situ spheroidization of In3+on GO surface towards cementitious composites: Hydrothermal duration

Graphene oxide (GO) can be used to improve the microstructure and mechanical performance of cementitious materials, however its disadvantage of being prone to agglomeration limits its application. Embedding nanoparticles in layered GO as a skeleton to form a three-dimensional structure can effectively reduce the aggregation of layered GO. In this paper, the electrostatic self-assembly of In(OH)3 and GO was realized by inducing In3+ to anchored nucleation and in-situ spheroidization on the surface of GO. The morphology, specific surface area and dispersion of In(OH)3-modified GO (IG) can be adjusted by controlling the hydrothermal duration. The degree of the cement hydration, the compressive and flexural strength of cement pastes containing IG (IGC) were improved. The cement hydration acceleration period, cross-sectional porosity, cumulative pore volume and water absorption of IGC samples were reduced at the same time.