Effect of Graphene Oxide Nanosheets dispersion in cement mortar composites incorporating Metakaolin and Silica Fume

Roy, Riya; Mitra, Ananda; Ganesh, Ajay T.; Sairam, V.

doi:10.1016/j.conbuildmat.2018.07.135

Cited by 58 publications

(15 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such reduction in workability is generally attributed to the large specific surface area of the GO nano sheets which consumes the free water in the mixture. Comparable results have been reported before in the literature [11,18,21].…”

Section: Workabilitysupporting

confidence: 90%

“…On the other hand, the imaging of the benchmark samples showed that the hydration of the cement particles was much less consecutive and smaller in size than those with the GO addition. Figure (12.a) shows a trace of flowerlike crystals (marked in circles in the Figure) similar to those reported in previous studies [12,21]. That is the incorporation of GO nano sheets offers growth points on its surface for the hydration process [25].…”

Section: Microstructure Of the Go/sf Cement Compositesupporting

confidence: 85%

See 1 more Smart Citation

Effect of Graphene Oxide on the Mechanical Strength and Microstructure of Cementitious Materials

Rashwan

Fahmy

Abdullah

et al. 2020

JES. Journal of Engineering Sciences

View full text Add to dashboard Cite

Cement-based concrete is used commonly for numerous constructions. Even though, cement has superior properties and great performance, its inherited brittleness is a major setback that needs more investigation for improvement. To eliminate this problem different types of additives, fibers, supplementary cementitious materials and nanomaterials have been used. One of these promising nanomaterials is graphene. This study is to investigate the feasibility of using graphene as a nanoadditive to the cement based materials combined with a common used nano-additive such as silica fume as a dispersant. To conduct the study, eleven different mortar mixes were cast to investigate microstructure and mechanical properties of the cement mortar materials which were compared to benchmark samples. The studied parameters were ratios of both silica and graphene. Based on compressive and tensile strength, the results show that graphene can be thought of having the potential to be used as nano-reinforcement to improve the mechanical properties of cement based materials, provided that a proper amount of the dispersion agent is used.

show abstract

Section: Workabilitysupporting

confidence: 90%

Section: Microstructure Of the Go/sf Cement Compositesupporting

confidence: 85%

Effect of Graphene Oxide on the Mechanical Strength and Microstructure of Cementitious Materials

Rashwan

Fahmy

Abdullah

et al. 2020

JES. Journal of Engineering Sciences

View full text Add to dashboard Cite

show abstract

“…Recent studies [126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147] have examined the performance of cement-based materials incorporating graphene family nanomaterials (GFN) such as graphene, graphene oxide (GO), reduced graphene oxide (rGO), and graphene nanosheets (GNS). These nanomaterials have extraordinary electrical, mechanical, chemical and thermal properties.…”

Section: Nanomaterials In Cement-based Materialsmentioning

confidence: 99%

Recent Progress in Nanomaterials for Modern Concrete Infrastructure: Advantages and Challenges

et al. 2019

View full text Add to dashboard Cite

Modern concrete infrastructure requires structural components with higher mechanical strength and greater durability. A solution is the addition of nanomaterials to cement-based materials, which can enhance their mechanical properties. Some such nanomaterials include nano-silica (nano-SiO2), nano-alumina (nano-Al2O3), nano-ferric oxide (nano-Fe2O3), nano-titanium oxide (nano-TiO2), carbon nanotubes (CNTs), graphene and graphene oxide. These nanomaterials can be added to cement with other reinforcement materials such as steel fibers, glass, rice hull powder and fly ash. Optimal dosages of these materials can improve the compressive, tensile and flexural strength of cement-based materials, as well as their water absorption and workability. The use of these nanomaterials can enhance the performance and life cycle of concrete infrastructures. This review presents recent researches about the main effects on performance of cement-based composites caused by the incorporation of nanomaterials. The nanomaterials could decrease the cement porosity, generating a denser interfacial transition zone. In addition, nanomaterials reinforced cement can allow the construction of high-strength concrete structures with greater durability, which will decrease the maintenance requirements or early replacement. Also, the incorporation of nano-TiO2 and CNTs in cementitious matrices can provide concrete structures with self-cleaning and self-sensing abilities. These advantages could help in the photocatalytic decomposition of pollutants and structural health monitoring of the concrete structures. The nanomaterials have a great potential for applications in smart infrastructure based on high-strength concrete structures.

show abstract

“…The high‐resolution image was observed by a transmission electron microscope using (Tecnai G2 F20 S‐TWIN, FEI) at 200 kV. XPS is employed by X‐ray photoelectron spectroscopy (Nexsa, ThermoFisher, UK), high‐resolution spectra for C1s was recorded at a pass energy of 40 eV (number of sweeps: 1) using an energy step size of 0.1 eV and a dwell time of 1500 ms …”

Section: Methodsmentioning

confidence: 99%

Reduced graphene oxide suspension with a comb copolymer and its effects on the corrosion resistance of hydroxyl polyacrylate coatings

Fan

Chen

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

A comb copolymer (CC) is designed and prepared in present article, by grafting epoxy resin (E-20) on poly(styrene-co-acrylate). The CC is used as a special dispersant, which leads to a stabilizable reduced graphene oxide (rGO) suspension in organic coatings. The dispersing mechanism is deduced as π-π attraction between CC and rGO, which is supported by the analysis data of Fourier transform infrared (FTIR) spectra, Raman spectroscopy, scanning electron microscope, transmission electron microscope, and X-ray photoelectron spectroscopy. The corrosion resistance of CG suspension is determined by electrochemical impedance spectroscopy, the results implies that the anti-corrosion behavior performed obviously, and protective efficiency is up to 99.53% in Tafel analysis.

show abstract

Effect of Graphene Oxide Nanosheets dispersion in cement mortar composites incorporating Metakaolin and Silica Fume

Cited by 58 publications

References 47 publications

Effect of Graphene Oxide on the Mechanical Strength and Microstructure of Cementitious Materials

Effect of Graphene Oxide on the Mechanical Strength and Microstructure of Cementitious Materials

Recent Progress in Nanomaterials for Modern Concrete Infrastructure: Advantages and Challenges

Reduced graphene oxide suspension with a comb copolymer and its effects on the corrosion resistance of hydroxyl polyacrylate coatings

Contact Info

Product

Resources

About