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Article

Experimental Investigation into the Structural and Functional Performance of Graphene Nano-Platelet (GNP)-Doped Asphalt

1
Department of Civil Engineering, University of Engineering and Technology Taxila, Taxila 47080, Pakistan
2
Department of Civil Engineering, Royal Melbourne Institute of Technology University, Victoria 3053, Australia
3
Department of Mechanical Engineering, University of Engineering and Technology Taxila, Taxila 47080, Pakistan
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(4), 686; https://doi.org/10.3390/app9040686
Received: 28 December 2018 / Revised: 3 February 2019 / Accepted: 13 February 2019 / Published: 17 February 2019
With the increase in the demand for bitumen, it has become essential for pavement engineers to ensure that construction of sustainable pavements occurs. For a complete analysis of the pavement, both its structural and functional performances are considered. In this study, a novel material (i.e., Graphene Nano-Platelets (GNPs)) has been used to enhance both of the types of pavements’ performances. Two percentages of GNPs (i.e., 2% and 4% by the weight of the binder) were used for the modification of asphalt binder in order to achieve the desired Performance Grade. GNPs were homogeneously dispersed in the asphalt binder, which was validated by Scanning Electron Microscope (SEM) images and a Hot Storage Stability Test. To analyze the structural performance of the GNPs-doped asphalt, its rheology, resistance to permanent deformation, resistance to moisture damage, and bitumen-aggregate adhesive bond strength were studied. For the analysis of the functional performance, the skid resistance and polishing effect were studied using a British Pendulum Skid Resistance Tester. The results showed that GNPs improved not only the rutting resistance of the pavement but also its durability. The high surface area of GNPs increases the pavement’s bonding strength and makes the asphalt binder stiffer. GNPs also provide nano-texture to the pavement, which enhances its skid resistance. Thus, we can recommend GNPs as an all-around modifier that could improve not only the structural performance but also the functional performance of asphalt pavements. View Full-Text
Keywords: Graphene nano-platelets (GNPs); asphalt; Scanning Electron Microscope (SEM); structural performance; functional performance Graphene nano-platelets (GNPs); asphalt; Scanning Electron Microscope (SEM); structural performance; functional performance
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MDPI and ACS Style

Hafeez, M.; Ahmad, N.; Kamal, M.A.; Rafi, J.; Haq, M.F.u.; Jamal; Zaidi, S.B.A.; Nasir, M.A. Experimental Investigation into the Structural and Functional Performance of Graphene Nano-Platelet (GNP)-Doped Asphalt. Appl. Sci. 2019, 9, 686. https://doi.org/10.3390/app9040686

AMA Style

Hafeez M, Ahmad N, Kamal MA, Rafi J, Haq MFu, Jamal, Zaidi SBA, Nasir MA. Experimental Investigation into the Structural and Functional Performance of Graphene Nano-Platelet (GNP)-Doped Asphalt. Applied Sciences. 2019; 9(4):686. https://doi.org/10.3390/app9040686

Chicago/Turabian Style

Hafeez, Murryam, Naveed Ahmad, Mumtaz A. Kamal, Javaria Rafi, Muhammad F.u. Haq, Jamal, Syed B.A. Zaidi, and Muhammad A. Nasir 2019. "Experimental Investigation into the Structural and Functional Performance of Graphene Nano-Platelet (GNP)-Doped Asphalt" Applied Sciences 9, no. 4: 686. https://doi.org/10.3390/app9040686

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