The research investigated the influence of graphene oxide (GO) addition on cement composites carbonation. Mortar samples were manufactured with Brazilian Cement CP V-ARI, ratio 1:3, with contents of 0%, 0.03% and 0.05% of GO ratio relative to the cement mass. No dispersants were used so that there were no intervening factors in the results of the experiments. Tests were performed on water absorption by immersion, mechanical behavior under compression and tensile stress by splitting tensile test and accelerated carbonation. It was possible to verify that carbonation influences the mechanical behavior of the composites. The addition of 0.05% of GO reduced the compressive strength of the carbonated samples of the mortars subjected to accelerates carbonation when compared to the 0%GO and 0.03%GO samples. Mortars with 0.03%GO and 0.05%GO showed an increase in carbonation depth in relation to the reference. From the test results it can be concluded that the addition of 0.03%GO has the potential to capture CO2 for the production of unreinforced cementitious composites.