Co-effects of graphene oxide sheets and single wall carbon nanotubes on mechanical properties of cement

Li, Xueguang; Wei, Wei; Qin, Hao; Hu, Yun Hang

doi:10.1016/j.jpcs.2015.04.018

Cited by 87 publications

(41 citation statements)

References 40 publications

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“…The Fourier-transform infrared spectroscopic (FT-IR) spectra (Waltham, MA, USA) of GO is shown in Figure 1 . The results confirmed that the oxygen functional groups of –OH, –COOH, and –O– were found on the surface of GO, as supported by the new absorption peaks of GO at 3390 cm −1 (–OH), 1731 cm −1 (–COOH), and 1384 and 1094 cm −1 (–O–), respectively [ 10 , 11 ]. These oxygen-containing groups were chemically grafted onto the graphite surface.…”

Section: Methodssupporting

confidence: 69%

Effect of Graphene Oxide (GO) on the Morphology and Microstructure of Cement Hydration Products

et al. 2017

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In this study, the effects of graphene oxide (GO) on the microstructure of cement mortars were studied using scanning electron microscopy (SEM), thermogravimetric (TG), and X-ray diffraction (XRD) techniques. Cement mortar samples with different proportions of GO (0.02, 0.04, 0.06, and 0.08 wt % based on the weight of cement) were prepared. The test results showed that GO affected the crystallization of cement hydration products, C–S–H (calcium silicate hydrate is the main hydrate product) and CH (calcium hydroxide). The morphology of hydration products changed with the increase of GO content. Furthermore, the results of XRD analyses showed that the diffraction peak intensity and the crystal grain size of CH (001), (100), (101), and (102) for GO samples increased considerably compared with the control sample. Based on the results, it can be understood that GO can modify the crystal surface of CH, leading to the formation of larger crystals.

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Section: Methodssupporting

confidence: 69%

Effect of Graphene Oxide (GO) on the Morphology and Microstructure of Cement Hydration Products

et al. 2017

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“…Recently, some researchers have noticed that the utilization of hybrids of carbon nanomaterials, and predominantly the combination of CNTs with GO, can give interesting outcomes. Li et al [118] reported that the increases in the bending strength of cement due to incorporating hybrids with 0.50 wt.% CNTs and 1.50 wt.% GO were about 40% and 200% compared to the values from adding only CNTs (0.50 wt.%) and GO (1.50 wt.%), respectively. As shown in Figure 10, Lu et al [119] reported an increase of about 21% in the compressive strength and 24% increment in the flexural strength of OPC when a hybrid of 0.025 wt.% CNTs and 0.025 wt.% GO was added.…”

Section: Improvement In Mechanical Properties and Relevant Mechanismsmentioning

confidence: 99%

Carbon nanomaterials enhanced cement-based composites: advances and challenges

Jing

Gao

et al. 2020

Nanotechnology Reviews

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AbstractCarbon nanomaterials, predominantly carbon nanofibers, carbon nanotubes, graphene, graphene nanoplates, graphene oxide and reduced graphene oxide, possess superior chemical, physical and mechanical properties. They have been successfully introduced into ordinary Portland cement to give enhancements in terms of mechanical properties, durability and electrical/thermal conductivity, and to modify the functional properties, converting conventional cement-based materials into stronger, smarter and more durable composites. This paper provides a comprehensive review of the properties of carbon nanomaterials, current developments and novel techniques in carbon nanomaterials enhanced cement-based composites (CN-CBCs). Further study of the applications of CN-CBCs at industrial scale is also discussed.

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“…[9][10][11][12] Based on existing research, the introduction of GO could increase the flexural strength, tensile strength, compressive strength and transport properties of cement. [13][14][15][16][17] Whereas, GO has the negative influence on the fluidity of cement. 18,19 Certainly, fluidity is an important property of cement; the good fluidity was the premise of workability and pumpability in actual using process.…”

Section: Introductionmentioning

confidence: 99%

Adsorption characteristics of graphene oxide nanosheets on cement

Wang

Yao

et al. 2016

RSC Adv.

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aThe graphene oxide (GO) nanosheets modified cement tremendously improved their mechanical properties but decreased the fluidity. The adsorption characteristics between GO and cement plays a pivotal role for the influence on fluidity. In this paper, the adsorption characteristics of graphene oxide nanosheets on cement were investigated by scanning electron microscope (SEM), total organic carbon (TOC), Fourier transform infrared spectra (FTIR) and XPS. The results show that GO nanosheets have a strong adsorption ability on the cement surface. And the adsorption data was best fitted with the Freundlich adsorption isotherm model and described by the pseudo-second order kinetics model, the adsorption process contained the chemical reaction that the -COOH on the edge of GO nanosheets reacted with the metal cations. The adsorption layer thickness of GO nanosheets on cement was about 10.16 nm.

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Co-effects of graphene oxide sheets and single wall carbon nanotubes on mechanical properties of cement

Cited by 87 publications

References 40 publications

Effect of Graphene Oxide (GO) on the Morphology and Microstructure of Cement Hydration Products

Effect of Graphene Oxide (GO) on the Morphology and Microstructure of Cement Hydration Products

Carbon nanomaterials enhanced cement-based composites: advances and challenges

Adsorption characteristics of graphene oxide nanosheets on cement

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