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Volume 14
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10.3390/ma14092434
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Article

Mechanical Characteristics of Graphene Nanoplatelets-Modified Asphalt Mixes: A Comparison with Polymer- and Not-Modified Asphalt Mixes

by
Laura Moretti
*,
Nico Fabrizi
,
Nicola Fiore
and
Antonio D’Andrea
Department of Civil, Constructional and Environmental Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
*
Author to whom correspondence should be addressed.
Materials 2021, 14(9), 2434; https://doi.org/10.3390/ma14092434
Submission received: 13 March 2021 / Revised: 5 May 2021 / Accepted: 6 May 2021 / Published: 7 May 2021
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Abstract

In recent years, nanotechnology has sparked an interest in nanomodification of bituminous materials to increase the viscosity of asphalt binders and improves the rutting and fatigue resistance of asphalt mixtures. This paper presents the experimental results of laboratory tests on bituminous mixtures laid on a 1052 m-long test section built in Rome, Italy. Four asphalt mixtures for wearing and binder layer were considered: two polymer modified asphalt concretes (the former modified with the additive Superplast and the latter modified with styrene–butadiene–styrene), a “hard” graphene nanoplatelets (GNPs) modified asphalt concrete and a not-modified mixture. The indirect tensile strength, water sensitivity, stiffness modulus, and fatigue resistance of the mixtures were tested and compared. A statistical analysis based on the results has shown that the mixtures with GNPs have higher mechanical performances than the others: GNP could significantly improve the tested mechanical performances; further studies will be carried out to investigate its effect on rutting and skid resistance.
Keywords: modified asphalt; fatigue resistance; stiffness modulus; graphene nanoplatelets; nanomodification modified asphalt; fatigue resistance; stiffness modulus; graphene nanoplatelets; nanomodification

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MDPI and ACS Style

Moretti, L.; Fabrizi, N.; Fiore, N.; D’Andrea, A. Mechanical Characteristics of Graphene Nanoplatelets-Modified Asphalt Mixes: A Comparison with Polymer- and Not-Modified Asphalt Mixes. Materials 2021, 14, 2434. https://doi.org/10.3390/ma14092434

AMA Style

Moretti L, Fabrizi N, Fiore N, D’Andrea A. Mechanical Characteristics of Graphene Nanoplatelets-Modified Asphalt Mixes: A Comparison with Polymer- and Not-Modified Asphalt Mixes. Materials. 2021; 14(9):2434. https://doi.org/10.3390/ma14092434

Chicago/Turabian Style

Moretti, Laura, Nico Fabrizi, Nicola Fiore, and Antonio D’Andrea. 2021. "Mechanical Characteristics of Graphene Nanoplatelets-Modified Asphalt Mixes: A Comparison with Polymer- and Not-Modified Asphalt Mixes" Materials 14, no. 9: 2434. https://doi.org/10.3390/ma14092434

APA Style

Moretti, L., Fabrizi, N., Fiore, N., & D’Andrea, A. (2021). Mechanical Characteristics of Graphene Nanoplatelets-Modified Asphalt Mixes: A Comparison with Polymer- and Not-Modified Asphalt Mixes. Materials, 14(9), 2434. https://doi.org/10.3390/ma14092434

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