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Open AccessArticle

Effect of Carbon Black Nanoparticles from the Pyrolysis of Discarded Tires on the Performance of Asphalt and its Mixtures

1
The Key Laboratory of Road Structure & Material Ministry of Transport, Beijing 100088, China
2
School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China
3
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
4
School of Civil Engineering and Architecture, Hubei University of Arts and Science, Xiangyang 441021, China
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2018, 8(4), 624; https://doi.org/10.3390/app8040624
Received: 15 March 2018 / Revised: 6 April 2018 / Accepted: 13 April 2018 / Published: 17 April 2018
It is of great benefit to the environment and the economy to use discarded tires pyrolysis carbon black (TPCB) nanoparticles as a modifier for asphalt binders. A base asphalt binder with 60/80 penetration (GF-70) was selected to prepare the TPCB-modified asphalt binder (TPCB/GF-70) with a 15% dosage of TPCB by the melt blending method. The test instruments, such as Fourier transform infrared spectroscopy, laser particle size analyzer, and thermogravimetric analyzer, were used to study the characteristics of TPCB. The physical performance of GF-70 and TPCB/GF-70 were tested and the rheological properties were also tested with a dynamic shear rheometer to investigate TPCB’s effect on the performance of GF-70. In addition, the aromatic hydrocarbon oil (AHO) was used as the softening agent for TPCB/GF-70. The pavement performance of AC-13 and AC-20 was studied to evaluate the comprehensive effect of TPCB and AHO on the pavement performance of asphalt mixtures. Results show that a 15% dosage of TPCB can significantly improve the anti-rutting performance of GF-70, and decrease the low-temperature performance of GF-70 within one PG grade. AHO can obviously improve the low-temperature performance of TPCB/GF-70, but does not significantly decrease the high-temperature performance. With the addition of AHO and a 0.1% higher oil aggregate ratio, TPCB tends to significantly improve the anti-rutting performance and the low-temperature performance of TPCB-modified mixtures; the moisture stability of TPCB and AHO composite modified mixtures satisfies the requirement of water stability. View Full-Text
Keywords: TPCB; asphalt and asphalt mixture; physical performance; rheological properties; optimization of pavement performance TPCB; asphalt and asphalt mixture; physical performance; rheological properties; optimization of pavement performance
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Li, C.; Fan, Z.; Wu, S.; Li, Y.; Gan, Y.; Zhang, A. Effect of Carbon Black Nanoparticles from the Pyrolysis of Discarded Tires on the Performance of Asphalt and its Mixtures. Appl. Sci. 2018, 8, 624.

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