Issue 70, 2020, Issue in Progress
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RSC Advances

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

Van Dac Ho, ORCID logo abc   Ching-Tai Ng,*a   Togay Ozbakkaloglu,d   Ramesh U. Karunagaran,bc   Farzaneh Farivar,bc   Andy Goodwin,e   Craig Mc Guckin,e   Van Duong Hof  and  Dusan Losic ORCID logo *bc  

* Corresponding authors

a School of Civil, Environmental and Mining Engineering, The University of Adelaide, Australia
E-mail: alex.ng@adelaide.edu.au

b School of Chemical Engineering, The University of Adelaide, Australia
E-mail: dusan.losic@adelaide.edu.au

c ARC Research Hub for Graphene Enabled Industry Transformation, The University of Adelaide, Australia

d Ingram School of Engineering, Texas State University, USA

e First Graphene Ltd, Suite 3, 9 Hampden Road, Nedlands, WA 6009, Australia

f University of Architecture Ho Chi Minh City, Vietnam

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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Article information

DOI
https://doi.org/10.1039/D0RA07639B
Article type
Paper
Submitted
06 Sep 2020
Accepted
08 Nov 2020
First published
25 Nov 2020
This article is Open Access
Creative Commons BY license

RSC Adv., 2020,10, 42777-42789

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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

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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