Carbon Nanotubes and Their Use for Asphalt Binder Modification: A Review

Haq, Muhammad Faizan ul; AhmadNaveed,; Jamal, Muhammad; AnwarWaqas,; Khitab, Anwar; HussanSabahat,

doi:10.1680/jemmr.18.00115

Cited by 15 publications

(9 citation statements)

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“…The base asphalt binder used in this study was 90#, and the performance parameters of the base asphalt are shown in Table 1. The CNT material was obtained from Nanocyl (Belgium) with a density of 0.1 g/cm 3 , an average length of 1.5 mm, an average inner diameter of 4 nm, and an outer diameter of 9.5 nm, while the surface area was 250−300 m 2 /g.…”

Section: Methodsmentioning

confidence: 99%

“…Carbon nanotube (CNT)-modified asphalt is expected to be the next generation of major pavement surfacing materials because of its excellent high-temperature rutting resistance, fatigue resistance, and low-temperature crack resistance. − Previous studies have explored the preparation process, , rheological properties, , and workability of CNT-modified asphalt more comprehensively. However, the property enhancement mechanism of CNT-modified asphalt is not well understood.…”

Section: Introductionmentioning

confidence: 99%

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Multiscale Enhancement Mechanism of Carbon Nanotube-Modified Asphalt at High Temperature by Oxidative Aging: A Molecular Dynamics Simulation Investigation

Yang

2022

Energy Fuels

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The objective of this study was to investigate the multiscale mechanism of oxidative aging on the high-temperature performance enhancement of carbon nanotube (CNT)-modified asphalt. Molecular dynamics simulations, atomic force microscopy, scanning electron microscopy, and dynamic shear rheometer were used to investigate the phenomena at different scales and ultimately to explain the mechanism of enhanced high-temperature properties. The results show that oxidative aging destroys the colloidal structure of the asphalt and makes the system more compact and active and causes aggregation of asphaltenes, which not only changes the bee-like structure but also enhances the rheological properties of the asphalt. Moreover, CNTs enhance the aging resistance of the asphalt binder due to the pullout properties of CNTs, which strengthens the asphalt interface and impedes the formation of a network structure by the penetration of oxygen atoms. In addition, CNTs and aromatics are most compatible, which makes the CNT-modified asphalt a three-phase composite with the CNT network as the reinforcing phase, the aromatic as the interfacial phase, and the asphalt binder as the matrix phase, which promotes enhanced resistance to deformation. In conclusion, this study provides basic theoretical insights to understand the aging resistance, rheological behavior, and microstructure formation of CNT-modified asphalt.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiscale Enhancement Mechanism of Carbon Nanotube-Modified Asphalt at High Temperature by Oxidative Aging: A Molecular Dynamics Simulation Investigation

Yang

2022

Energy Fuels

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“…Nanomodifiers improve the characteristics of substrates characteristic of the substrate compared to their macroand micro-sized counterparts. Multidimensional nanomaterials possess incredible characteristics, which make them suitable as additives in asphalt [58]. The optimum ratio of the modified asphalt is characterized by optimum performances, the asphalt modified by Nano-CaCO3/ nano-ZnO/SBR compound with 6% in the mixture reducing asphalt aging and viscosity.…”

Section: Types Of Multidimensional Nanomaterials In Asphaltsmentioning

confidence: 99%

Resistance to Aging of Asphalt Modified with Multidimensional Nanomaterials: A literary Review

Pérez

Horna²,

Pastor³

2022

Period. Polytech. Civil Eng.

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Multidimensional nanomaterials, is a resource that has been formed over time becoming a revolutionary technology with a transcendent character providing the use in asphalt construction procedures, benefiting in the aspects of resistance in the environments to the field of civil engineering, in the same way it is a way in the advance for a better conservation of horizontal works with a favorable impact on the materials used, helping to preserve the care of the environment. In such a way that, in this article, a systematic review is reflected, around the exhaustive research in the databases such as Scopus and Science Direct, compiling a sum of 85 articles, which are indexed in journals from 2017 to 2021, carried out correspondingly on the different investigations of the management of multidimensional nanomaterials in asphalts. The objective of this literary review is to transmit various research by authors such as: the impact on the life cycle of asphalt, the performance it produces, the profitability and the advantage of the teaching that multidimensional nanomaterials have left, to later show results that show a growth in yields in asphalts through the application of multidimensional nanomaterials, So that it presents greater efficiency in the resistance to aging of the asphalt it is concluded that the nanomaterials reduce the environmental impact caused by the field of the constructions, improving the anti-aging capacity of the asphalt.

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“…• γ R p -Peak pseudo strain, calculated according to Equation ( 6); • DMR-Dynamic modulus ratio, calculated according to Equation ( 7); • C-Pseudo stiffness, which is a function of the material with respect to the damage variable S, is calculated according to Equation ( 8); • t R -Reduced time, i is the number of cycles, calculated according to Equation (9).…”

Section: Las Testmentioning

confidence: 99%

“…Some researchers have proposed that nanomaterials such as carbon nanotubes (CNTs), nano-clay, and nano-titanium dioxide was added to asphalt as modifiers to change the macroscopic properties of materials on a nanometer scale [8]. Among them, CNTs has the advantages of a lightweight, good stability, and high strength, so it has shown great potential to reduce the aging degree and improve the thermal stability in the field of modified asphalt materials [9]. Wang et al [10] and Amin et al [11] studied the aging and rheological properties of multi-walled CNTs-modified asphalt.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Preparation and Properties of Crack Sealants Based on CNTs/SBS Composite-Modified Asphalt

et al. 2021

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Crack is the main distress of asphalt pavement. Sealant is one of the most commonly used crack repair materials, and its performance is the key to affect the service life of asphalt pavements. In order to find an efficient modifier and optimize the performances of crack sealants. In this paper, carbon nanotubes (CNTs) and styrene-butadiene-styrene (SBS) were used as modifiers to prepare CNTs/SBS composite-modified asphalt crack sealant. The properties of the sealant were tested to evaluate its suitability for crack repair, which included the viscosity, softening point, resilience recovery, cone penetration, flow value, penetration, aging resistance, and fatigue resistance. The results showed that the conventional properties of the sealants meet the requirements of the specification. In addition, after heating aging, the elastic recovery rate of the sealant containing more CNTs decreased only slightly. The sealant containing 1 wt% CNTs exhibited a higher viscosity, fatigue resistance, thermal aging resistance.

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Carbon Nanotubes and Their Use for Asphalt Binder Modification: A Review

Cited by 15 publications

References 0 publications

Multiscale Enhancement Mechanism of Carbon Nanotube-Modified Asphalt at High Temperature by Oxidative Aging: A Molecular Dynamics Simulation Investigation

Multiscale Enhancement Mechanism of Carbon Nanotube-Modified Asphalt at High Temperature by Oxidative Aging: A Molecular Dynamics Simulation Investigation

Resistance to Aging of Asphalt Modified with Multidimensional Nanomaterials: A literary Review

Investigation on Preparation and Properties of Crack Sealants Based on CNTs/SBS Composite-Modified Asphalt

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