Effect of graphene oxide on mechanical properties of UHPC and analysis of micro-control mechanism

Abstract Recently, graphene oxide (GO) is one of the nanomaterials that enhance performance cement-based materials. In this paper, effects different mass GO on workability and mechanical properties UHPC studied, its mechanism explored by micro-nano analysis methods such as XRD, SEM, MIP nano indentation. The results show that, compared with reference group, 0.04% addition reduces fluidity UHPC, initial final setting time slurry, compressive strength, flexural strength tensile sample at 28d 15.8%, 14% 15.3%, respectively. Micro-nano promotes cement hydration, porosity improves microstructure interface transition zone between steel fiber matrix, nano-mechanical properties. This mainly attributed to nucleation effect interfacial bonding C-S-H gel.