Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/23852
Title: | Extra-low dosage graphene oxide cementitious nanocomposites: A nano-to macroscale approach |
Authors: | Chougan, M Lamastra, FR Bolli, E Caschera, D Kaciulis, S Mazzuca, C Montesperelli, G Ghaffar, SH Al-Kheetan, MJ Bianco, A |
Keywords: | graphene oxide;cementitious nanocomposites;rheology;workability;mechanical properties;permeability |
Issue Date: | 2-Dec-2021 |
Publisher: | MDPI AG |
Citation: | Chougan, M., Lamastra, F.R., Bolli, E., Caschera, D., Kaciulis, S., Mazzuca, C., Montesperelli, G., Ghaffar, S.H., Al-Kheetan, M.J. and Bianco, A. (2021) ‘Extra-Low Dosage Graphene Oxide Cementitious Nanocomposites: A Nano- to Macroscale Approach’, Nanomaterials, 11 (12), 3278, pp. 1-20. doi: 10.3390/nano11123278. |
Abstract: | Copyright: © 2021 by the authors. The impact of extra-low dosage (0.01% by weight of cement) Graphene Oxide (GO) on the properties of fresh and hardened nanocomposites was assessed. The use of a minimum amount of 2-D nanofiller would minimize costs and sustainability issues, therefore encouraging the market uptake of nanoengineered cement-based materials. GO was characterized by X-ray Photoelectron Spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), Atomic Force Microscopy (AFM), X-ray Diffraction (XRD), and Raman spectroscopy. GO consisted of stacked sheets up to 600 nm × 800 nm wide and 2 nm thick, oxygen content 31 at%. The impact of GO on the fresh admixtures was evaluated by rheology, flowability, and workability measurements. GO-modified samples were characterized by density measurements, Scanning Electron Microscopy (SEM) analysis, and compression and bending tests. Permeability was investigated using the boiling-water saturation technique, salt ponding test, and Initial Surface Absorption Test (ISAT). At 28 days, GO-nanocomposite exhibited increased density (+14%), improved compressive and flexural strength (+29% and +13%, respectively), and decreased permeability compared to the control sample. The strengthening effect dominated over the adverse effects associated with the worsening of the fresh properties; reduced permeability was mainly attributed to the refining of the pore network induced by the presence of GO. |
URI: | https://bura.brunel.ac.uk/handle/2438/23852 |
DOI: | https://doi.org/10.3390/nano11123278 |
Other Identifiers: | 3278 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
FullText.pdf | 5.33 MB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License