Influence of Graphene Nanosheets on Rheology, Microstructure, Strength Development and Self-Sensing Properties of Cement Based Composites

Abstract

In this research, Graphene oxide (GO), prepared by modified hammer method, is characterized using X-ray Diffraction (XRD), Fourier Transform Infrared (FT-IR) Spectrometry and Raman spectra. The dispersion efficiency of GO in aqueous solution is examined by Ultraviolet-visible spectroscopy and it is found that GO sheets are well dispersed. Thereafter, rheological properties, flow diameter, hardened density, compressive strength and electrical properties of GO based cement composite are investigated by incorporating 0.03% GO in cement matrix. The reasons for improvement in strength are also discussed. Rheological results confirm that GO influenced the flow behavior and enhanced the viscosity of the cement based system. From XRD and Thermogravimetric Analysis (TGA) results, it is found that more hydration occurred when GO was incorporated in cement based composite. The GO based cement composite improves the compressive strength and density of mortar by 27% and 1.43%, respectively. Electrical properties results showed that GO-cement based composite possesses self-sensing characteristics. Hence, GO is a potential nano-reinforcement candidate and can be used as self-sensing sustainable construction material.

Novel engineered high performance sugar beetroot 2D nanoplatelet-cementitious composites

“…This is due to the increase of the high density C-S-H content and the creation of new intercalated BNP/C-S-H nanocomposites with higher density. This is consistent with Rehman et al [24] findings where they have shown that the decrease in the mass loss of GO cementitious composites is attributed to both the bonding of C-S-H with the GO sheets and the increase of the C-S-H content. In this case, the GO sheets tend to increase the amount of C-S-H product, thereby filling the pores in the matrix resulting in less amount of water available for evaporation [24].…”

Antibacterial activity of graphene oxide nanosheet against multidrug resistant superbugs isolated from infected patients

“…Significantly this conjoining of enormous oxygen-containing groups makes GO hydrophilic and highly stable in polar solvents [ 50 ]. Additionally, the appearance of one strong peak at 2350 cm −1 for both graphite and GO is attributed to the O=C=O stretching of gaseous CO 2 absorbed by the material surface [ 51 , 52 ]. The thermal stability of graphite and GO were investigated by TGA.…”

The phase composition, morphology and compressibility of graphene–zirconia composite nanostructured powder

“…It was shown that the presence of sheets of 0.05 wt% oxidized graphene in cement leads to an increase in compressive strength and exural strength of the material by 15-33 and 41-59%, respectively. [37][38][39] However, it is not known yet if there is any study of nanocarbon species inclusion effect on the rheological properties of nano-and submicron powders. We carry out comparative research of the nanopowders of a graphenecontaining composite and pure zirconia obtained from the same sol as a composite.…”