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Appl. Sci. 2018, 8(7), 1114;

Performance Evaluation of Carbon Black Nano-Particle Reinforced Asphalt Mixture

Department of Civil Engineering, University of Engineering and Technology Taxila, Taxila 47080, Pakistan
Author to whom correspondence should be addressed.
Received: 24 May 2018 / Revised: 30 June 2018 / Accepted: 6 July 2018 / Published: 10 July 2018
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Applications of nanotechnology in the pavement industry have increased rapidly during the last decade in order to enhance a pavement’s sustainability and durability. Conventional asphalt binder generally does not provide sufficient resistance against rutting at high temperatures. Carbon black nano-particles (CBNPs, produced by perennial mountain trees’ carbonization) were mixed into the performance grade (PG) 58 asphalt binder in this study. Conventional asphalt binder tests (penetration, ductility and softening point), frequency sweep, performance grading, and bitumen bond strength tests were conducted to study the enhancement in the properties of asphalt binder. Dynamic modulus and wheel tracking tests were also performed to investigate the effect of CBNPs on asphalt mixture properties. Experimental results demonstrated that preferred dosage of CBNPs in asphalt is 10% by weight of the bitumen. Results of scanning electron microscopy (SEM) and storage stability tests validated homogenous and stable dispersion of CBNPs in the asphalt binder. Asphalt mixtures became stiffer and resistant to rutting at high temperatures by addition of CBNPs in asphalt binder. Significant improvement in bitumen aggregate bond strength was also observed by incorporating CBNPs. It is concluded that CBNPs can be used to effectively enhance the high-temperature performance and consequently the sustainability of flexible pavements. View Full-Text
Keywords: carbon black nano-particles (CBNPs); asphalt binder; performance grading; scanning electron microscopy (SEM); dynamic modulus; rutting carbon black nano-particles (CBNPs); asphalt binder; performance grading; scanning electron microscopy (SEM); dynamic modulus; rutting

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Rafi, J.; Kamal, M.A.; Ahmad, N.; Hafeez, M.; Faizan ul Haq, M.; Aamara Asif, S.; Shabbir, F.; Bilal Ahmed Zaidi, S. Performance Evaluation of Carbon Black Nano-Particle Reinforced Asphalt Mixture. Appl. Sci. 2018, 8, 1114.

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