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

Abstract

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.

Performance Evaluation of Carbon Black Nano-Particle Reinforced Asphalt Mixture

“…Similar natural resources are easily available in the country and it would be easy for it to utilize CBNPs in asphalt pavements. It has been found in the literature that CBNPs can effectively improve asphalt pavement performance at 15% or 20% dosage [12,14,33], while the CBNPs used in this study have 10% desirable dosage in asphalt. Thus, the CBNPs produced through natural sources have more potential to influence the asphalt properties and can help in conserving resources.…”

“…It has been learnt that high dosages of carbon black in asphalt can increase the rutting resistance and lessen the temperature susceptibility [2][3][4][5][6][7][8][9][10][11]. It is also said that the performance of carbon black depends upon its structure, particle size and surface area [12,13]. Nanotechnology is an emerging field and is extensively used by pavement engineers worldwide.…”

Investigating the high-temperature performance and activation energy of carbon black-modified asphalt binder

“…It has been proved that carbon atoms in the graphite-like sheets presented in the carbon black fortify carbonyl functional group (C=O) and C-O bonds of the asphalt binder [35]. It has been also claimed that the lighter portion of asphalt binder is absorbed by carbon black resulting a higher viscosity asphalt binder [36,37]. In another way, CB incorporated in crumb rubber can transform into asphalt binder by absorbing paraffin and maltenes of asphalt binder [38].…”

Preparation and Properties of an Active Cooling Antirutting Asphalt Mixture

“…erefore, new environment-friendly pavement materials are being studied. To remedy the issue of the hightemperature stability of asphalt pavement, measures, such as the optimization of gradation [1,2], addition of fiber [3], and addition of an antirutting agent [4,5], have been adopted to improve the high-temperature stability of the asphalt mixture. Further, a pavement cooling coating or thermal resistive aggregate can be used to reduce the temperature of asphalt pavements in hot weather [6][7][8].…”