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<p>With the development of construction industry there is a challenge of strength development in an ecofriendly way. Reduced graphene oxide (rGO) is a nano-material which is dispersible in water. Many researchers have studied the influence of rGO in mechanical strength of mortar-based matrix with different ratios of rGO but limited on concrete ratios. This paper studies the impact of various ratios of rGO on mechanical properties of concrete composites to optimize the ratio. Six mixes were prepared with rGO as a partial substitute of cement in concrete in ratios of 0, 0.1, 0.2, 0.4, 0.6 and 0.8%. Tests for fresh properties, compressive strength (CS), split tensile strength (TS) and flexural strength (FS) were performed, compared and reported. The mix with 0.2% rGO showed the highest increase in CS, TS and FS with 37.38, 49.77 and 29.06% respectively as compared with control sample. The highest and lowest strength mix sample was analyzed by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) on 28&#xa0;days of curing period. A one-way analysis of variance (ANOVA) was employed to determine whether the means of the mechanical strength of concrete were impacted by varying graphene ratios. Regression analysis showed good fit correlation between TS and FS of concrete. Obtained results showed that incorporation of rGO showed better strength than control mix and using rGO in concrete is an alternative nano material to enhance strength and leads to sustainable construction.</p>

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Mechanical and microstructural analysis of concrete with graphene as partial replacement of cement

  • 期刊论文

  • 发表日期：

    2025年1月27日

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  • Neha Singh,
  • Jaspreet Singh

摘要

With the development of construction industry there is a challenge of strength development in an ecofriendly way. Reduced graphene oxide (rGO) is a nano-material which is dispersible in water. Many researchers have studied the influence of rGO in mechanical strength of mortar-based matrix with different ratios of rGO but limited on concrete ratios. This paper studies the impact of various ratios of rGO on mechanical properties of concrete composites to optimize the ratio. Six mixes were prepared with rGO as a partial substitute of cement in concrete in ratios of 0, 0.1, 0.2, 0.4, 0.6 and 0.8%. Tests for fresh properties, compressive strength (CS), split tensile strength (TS) and flexural strength (FS) were performed, compared and reported. The mix with 0.2% rGO showed the highest increase in CS, TS and FS with 37.38, 49.77 and 29.06% respectively as compared with control sample. The highest and lowest strength mix sample was analyzed by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) on 28 days of curing period. A one-way analysis of variance (ANOVA) was employed to determine whether the means of the mechanical strength of concrete were impacted by varying graphene ratios. Regression analysis showed good fit correlation between TS and FS of concrete. Obtained results showed that incorporation of rGO showed better strength than control mix and using rGO in concrete is an alternative nano material to enhance strength and leads to sustainable construction.