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Effects of graphene oxide on pore structure and mechanical properties of cementitious composites

机译：氧化石墨烯对水泥基复合材料孔隙结构和力学性能的影响

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The effects of graphene oxide (GO), a 2-dimensional structured nano-material, were evaluated in terms of the workability, mechanical properties, and pore structure of cementitious composites. The cementitious composites, with GO replacing 0, 0.01, 0.025, 0.03, and 0.05 wt% of the unit weight of cement, were evaluated for their workability based on the slump and air content tests, and to their mechanical properties with a compressive strength test. The pore structure for different GO replacement ratios was analyzed statistically by nitrogen absorption to demonstrate its effects on the workability and mechanical properties. As the GO replacement ratio increased, the workability was found to decrease by 22.7 similar to 45.5%, and then to decrease further when the GO replacement ratio reaches 0.03 wt% or higher. According to pore structure analysis, when the GO replacement rate is higher than 0.03 wt%, the pore volume increases, thus suggesting the cause of the decrease in the compressive strength, which we further verified statistically.
机译：从水泥复合材料的可加工性，机械性能和孔结构方面评估了二维结构的纳米材料氧化石墨烯（GO）的效果。通过坍落度和空气含量测试评估了GO代替水泥单位重量的0、0.01、0.025、0.03和0.05 wt％的水泥基复合材料的可加工性，并通过抗压强度测试评估了其机械性能。通过氮吸收量统计分析了不同GO替代比例的孔结构，以证明其对可加工性和机械性能的影响。随着GO替代率的增加，发现可加工性降低了22.7，类似于45.5％，然后当GO替代率达到0.03wt％或更高时进一步降低。根据孔结构分析，当GO替代率高于0.03 wt％时，孔体积增加，这表明了抗压强度降低的原因，我们对此进行了统计验证。

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