The Influence of Graphene Oxide on Mechanical Properties and Durability Increase of Concrete Pavement

Herein, the performance of graphene oxide (go) in improving mechanical properties and subsequently reducing thepermeability of cement composites used in concrete pavement, is studied. a polycarboxylate superplasticizer wasused to improve the dispersion of go flakes in the cement. the mechanical strength of graphene-cement nanocompositescontaining 0.1–2 wt% go and 0.5 wt% superplasticizer was measured and compared with that of cement preparedwithout go. we found that the tensile strength of the cement mortar increased with go content, reaching 1.5%, a48% increase in tensile strength. ultra high-resolution field emission scanning electron microscopy (fe-sem) used toobserve the fracture surface of samples containing 1.5 wt% go indicated that the nano go flakes were well dispersedin the matrix, and no aggregates were observed. fe-sem observation also revealed good bonding between the gosurfaces and the surrounding cement matrix. in addition, xrd diffraction data showed growth of the calcium silicatehydrates (c-s-h) gels in go cement mortar compared with the normal cement mortar. growths of the calcium silicatehydrates (c-s-h) gels causes reduce in permeability and consequently improvement in durability of the cementcomposite.