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首页> 美国卫生研究院文献>Nanomaterials >Effect of Graphene Oxide/Graphene Hybrid on Mechanical Properties of Cement Mortar and Mechanism Investigation
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Effect of Graphene Oxide/Graphene Hybrid on Mechanical Properties of Cement Mortar and Mechanism Investigation

机译：氧化石墨烯/石墨烯杂化物对水泥砂浆力学性能的影响及机理研究

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This paper evaluated the effect of graphene oxide/graphene (GO/GR) hybrid on mechanical properties of cement mortar. The underlying mechanism was also investigated. In the GO/GR hybrid, GO was expected to act as a dispersant for GR while GR was used as reinforcement in mortar due to its excellent mechanical properties. For the mortar specimen, flexural and compressive strength were measured at varied GO to GR ratios of 1:0, 3:1, 1:1, 1:3, and 0:1 by keeping the total amount of GO and GR constant. The underlying mechanism was investigated through the dispersibility of GR, heat releasing characteristics during hydration, and porosity of mortar. The results showed that GO/GR hybrid significantly enhanced the flexural and compressive strength of cement mortars. The flexural strength reached maximum at GO:GR = 1:1, where the enhancement level was up to 23.04% (28 days) when compared to mortar prepared with only GO, and up to 15.63% (7 days) when compared to mortar prepared with only GR. In terms of compressive strength, the enhancement level for GO:GR = 3:1 was up to 21.10% (3 days) when compared with that of mortar incorporating GO only. The enhancement in compressive strength with mortar at GO:GR = 1:1 was up to 14.69% (7-day) when compared with mortar incorporating GR only. In addition to dispersibility, the compressive strength was also influenced by other factors, such as the degree of hydration, porosity, and pore size distribution of mortar, which made the mortars perform best at different ages.
机译：本文评估了氧化石墨烯/石墨烯（GO / GR）杂化对水泥砂浆力学性能的影响。还研究了潜在的机制。在GO / GR混合料中，由于其优异的机械性能，预计GO可用作GR的分散剂，而GR用作砂浆的增强剂。对于砂浆试样，通过保持GO和GR的总量不变，以1：0、3：1、1：1、1：3和0：1的不同GO与GR比测量抗弯强度和抗压强度。通过GR的分散性，水合过程中的放热特性和砂浆的孔隙率研究了其潜在机理。结果表明，GO / GR杂化剂显着增强了水泥砂浆的抗弯强度和抗压强度。抗弯强度在GO：GR = 1：1时达到最大值，与仅使用GO制备的砂浆相比，增强水平高达23.04％（28天），与制备的砂浆相比，增强水平高达15.63％（7天）只有GR。就抗压强度而言，与仅掺入GO的砂浆相比，GO：GR = 3：1的增强水平高达21.10％（3天）。与仅掺有GR的砂浆相比，GO：GR = 1：1的砂浆的抗压强度提高了14.69％（7天）。除分散性外，抗压强度还受到砂浆的水合度，孔隙率和孔径分布等其他因素的影响，这使得砂浆在不同年龄下的性能最佳。

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