The influence of graphene nanoplatelets’ content on sustainable concrete mechanical properties and microstructure

IF 1.8 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Magazine of Concrete Research Pub Date : 2024-03-23 DOI:10.1680/jmacr.23.00238

Mohamed O. Mohsen, Mervat O. Aburumman, Malak M. Al-diseet, Mu'tasim Abdel-Jaber, Ramzi Taha, Mohamed S. Al Ansari, Ahmed Senouci, A. A. Taqa

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Abstract

This paper investigates the effect of Graphene Nanoplatelets’ (GNPs) content on sustainable concrete mechanical properties and microstructure. Aqueous solutions were prepared using a wet-dispersion technique to disperse GNPs in the mixing water. Concrete batches were prepared using GNPs-to-cement ratios of 0.05, 0.1, 0.25, 0.5, 1 and 2 %. The 28 day compressive, flexural, and tensile strengths of the prepared specimens were then determined. Moreover, specimen qualitative microstructural analyses were performed using a Scanning Electron Microscope (SEM) and Energy Dispersive X-Ray (EDX). The results obtained were then analyzed using ANOVA method that demonstrated improvements in all strength properties when using GNPs’ filaments regardless of their weight fraction. The batch containing 0.5 % GNPs had the largest strength improvements where the mix of compressive, flexural, and tensile strength properties could be improved by 22.6%, 23.9% and 255.4 %, respectively. The microstructure analysis showed a good dispersion of nanofilaments inside the concrete matrix using the dispersion technique utilized in this study. Finally, the ANOVA analysis reveals statistically significant relationships between the GNPs’ content ratio and compressive, flexural, and tensile strengths in the concrete samples. The results highlight the importance of the GNPs’ content ratio in influencing the concrete's mechanical properties.

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石墨烯纳米颗粒含量对可持续混凝土力学性能和微观结构的影响

本文研究了石墨烯纳米片（GNPs）含量对可持续混凝土力学性能和微观结构的影响。采用湿法分散技术制备水溶液，将 GNPs 分散在拌合水中。采用 0.05%、0.1%、0.25%、0.5%、1% 和 2% 的 GNP 与水泥比率配制混凝土批次。然后测定了所制备试样的 28 天抗压、抗弯和抗拉强度。此外，还使用扫描电子显微镜（SEM）和能量色散 X 射线（EDX）对试样的微观结构进行了定性分析。然后使用方差分析法对所得结果进行了分析，结果表明，无论 GNPs 的重量百分比如何，使用 GNPs 长丝都能改善所有强度特性。含有 0.5 % GNPs 的批次强度提高幅度最大，抗压、抗弯和抗拉强度分别提高了 22.6%、23.9% 和 255.4%。微观结构分析表明，采用本研究中使用的分散技术，纳米丝在混凝土基体中的分散效果良好。最后，方差分析显示，GNPs 的含量比与混凝土样品的抗压、抗弯和抗拉强度之间存在显著的统计学关系。结果凸显了 GNPs 含量比在影响混凝土力学性能方面的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Magazine of Concrete Research 工程技术-材料科学：综合

CiteScore

4.60

自引率

11.10%

发文量

102

审稿时长

5 months

期刊介绍： For concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed. Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.