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Issue 70, 2020, Issue in Progress
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Investigating the reinforcing mechanism and optimized dosage of pristine graphene for enhancing mechanical strengths of cementitious composites

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Abstract

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.

Graphical abstract: Investigating the reinforcing mechanism and optimized dosage of pristine graphene for enhancing mechanical strengths of cementitious composites

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Supplementary files

Article information


Submitted
06 Sep 2020
Accepted
08 Nov 2020
First published
25 Nov 2020

This article is Open Access

RSC Adv., 2020,10, 42777-42789
Article type
Paper

Investigating the reinforcing mechanism and optimized dosage of pristine graphene for enhancing mechanical strengths of cementitious composites

V. D. Ho, C. Ng, T. Ozbakkaloglu, R. U. Karunagaran, F. Farivar, A. Goodwin, C. M. Guckin, V. D. Ho and D. Losic, RSC Adv., 2020, 10, 42777
DOI: 10.1039/D0RA07639B

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