Graphene-oxide-reinforced cement composites mechanical and microstructural characteristics at elevated temperatures

Abstract The focus of this research was to investigate the effects graphene oxide (GO) on microscopic composition, structure, pore size, and mechanical properties GO-reinforced cement composites. Furthermore, explored thermal behavior mortar at different elevated temperatures (250, 500, 750, 1,000°C). This study considered three sets composites with 0.1, 0.2, 0.3 wt% GO (by weight cement); water–cement ratio in all mixtures 0.5. To characterize chemical microstructure, hydration degree resulting from addition, X-ray diffraction, thermogravimetry, derivative scanning electron microscopy, energy-dispersive spectroscopy, micro-computed tomography (Micro-CT) were used. experimental results revealed that addition changed microstructural composition diameter distribution composite. optimal amount required for improving composite under both unheated heated conditions identified be 0.1 wt%. improves matrices’ ability bind nanosheets, leading compressive strength retention decreased micro-cracking (computed by material defected volume changes Micro-CT analysis). is primarily due products. However, can result nanomaterial agglomeration, thus lowering resistance Overall, as a nano-additive potential improve toughness Moreover, effect elastic modulus also evaluated. As result, microstructure analysis it has porous structure visible crack pattern.