%0 Journal Article %T The Influence of Graphene Oxide on Mechanical Properties and Durability Increase of Concrete Pavement %J International Journal of Transportation Engineering %I Tarrahan Parseh Transportation Research Institute %Z 2322-259X %A Hassani, Abolfazl %A Fakhim, Babak %A Rashidi, Alimorad %A Ghoddousi, Parviz %D 2014 %\ 10/01/2014 %V 2 %N 2 %P 119-130 %! The Influence of Graphene Oxide on Mechanical Properties and Durability Increase of Concrete Pavement %K cement %K Nanocomposite %K graphene oxide %K Mechanical properties %K tensile strength. Pavement %R 10.22119/ijte.2014.7874 %X Herein, the performance of graphene oxide (GO) in improving mechanical properties and subsequently reducing the permeability of cement composites used in concrete pavement, is studied. A polycarboxylate superplasticizer was used to improve the dispersion of GO flakes in the cement. The mechanical strength of graphene-cement nanocomposites containing 0.1–2 wt% GO and 0.5 wt% superplasticizer was measured and compared with that of cement prepared without GO. We found that the tensile strength of the cement mortar increased with GO content, reaching 1.5%, a 48% increase in tensile strength. Ultra high-resolution field emission scanning electron microscopy (FE-SEM) used to observe the fracture surface of samples containing 1.5 wt% GO indicated that the nano GO flakes were well dispersed in the matrix, and no aggregates were observed. FE-SEM observation also revealed good bonding between the GO surfaces and the surrounding cement matrix. In addition, XRD diffraction data showed growth of the calcium silicate hydrates (C-S-H) gels in GO cement mortar compared with the normal cement mortar. Growths of the calcium silicate hydrates (C-S-H) gels causes reduce in permeability and consequently improvement in durability of the cement composite. %U http://www.ijte.ir/article_7874_5f41230ce5b2ff38d0c250597c30aec5.pdf