▎ 摘　　要

In this study, the effect of graphene oxide (GO) dosage on the performance of cement pastes against an extreme nitric acid environment was investigated. A significant volume of cement matrix was affected because of such attack. The loss in specimen mass and sectional area before and after acid attacks were compared to validate the relative performance between the cement mixes. Compared to the 28-day cured reference mix, the mass and sectional area losses in the acid exposed cement specimen had reduced up to 17% and 25% when the matrix was modified using 0.03 wt% GO, respectively. With an increase in GO dosage from 0 to 0.03 wt% at an interval of 0.01 wt%, it was found that the porosity of cement pastes significantly declined due to crack-arresting effects, which also explained the improved resistance of cement composites against the acidic medium. The GO presence did not influence the mineralogy of the altered cement matrix. Still, it contributed to the material stiffness, which was determined after conducting multiple characterisation studies. Thus, the GO-modified cement concrete was found to be a promising material to construct the storage structures operating under aggressive chemicals and crack inducing conditions. (C) 2020 Elsevier Ltd. All rights reserved.