Journal
RSC ADVANCES
Volume 10, Issue 70, Pages 42777-42789Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra07639b
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Funding
- ARC Research Hub for Graphene Enabled Industry Transformation [IH 1500003]
- First Graphene Ltd (Perth, WA, Australia)
- Schools of Civil, Environmental and Mining Engineering at the University of Adelaide
- School of Chemical Engineering and Advanced Materials at the University of Adelaide
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The proposed reinforcing mechanism and optimized dosage of pristine graphene (PRG) for enhancing mechanical, physicochemical and microstructural properties of cementitious mortar composites are presented. Five concentrations of PRG and two particle sizes are explored in this study. The results confirmed that the strength of the mortars depends on the dosage of PRG. The PRG sizes have a significant influence on the enhancement rate of mechanical strengths of the mortars, whereas they do not have a significant influence on the optimized PRG dosage for mechanical strengths. The PRG dosage of 0.07% is identified as the optimized content of PRG for enhancing mechanical strengths. The reinforcing mechanism of PRG for cement-based composites is mostly attributed to adhesion friction forces between PRG sheets and cementitious gels, which highly depends on the surface area of PRG sheets. The larger surface area of PRG sheets has a larger friction area associated with cementitious gels suggested to be one of favorable parameters for enhancing mechanical strengths with graphene additives.
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