▎ 摘　　要

In this study, the microstructure and micromechanical properties of graphene oxide (GO) cement-based materials are investigated. Nanoindentation with statistical deconvolution was used to determine the elastic properties of constituent phases. Besides, combined with scanning electron microscopy (SEM) equipped with energy-dispersive spectrometer (EDS) and backscattered electrons (BSE), each phase of hardened cement paste was identified and quantified as well. X-ray computed tomography (XCT) microscope was applied to determine the morphology of micrometer-size pores, while mercury intrusion porosimetry (MIP) was used to capture the volume fraction of smaller pores (nano-scale). The combined use of XCT and MIP offered an effective approach for further understanding the effect of GO on pore structure at multi-scale. The synergistic analysis of microstructure and micromechanical properties at multi-scale provides valuable information towards the material design of cement-based materials with nanomaterials. (C) 2018 Elsevier Ltd. All rights reserved.