Performance evaluation of bitumen with a homogeneous dispersion of carbon nanotubes

Yang, Qilin; Li, Xin; Zhang, Liang; Yue, Qian; Qi, Yuzhao; Kouhestani, Hamed Sadegh; Shi, Xianming; Gui, Xuchun; Wang, Dawei; Zhong, Jing

doi:10.1016/j.carbon.2019.11.013

Cited by 59 publications

(25 citation statements)

References 38 publications

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“…With the continuous development of society, more and more new technologies are applied in road engineering to meet the needs of energy saving, environmental protection, and intelligent infrastructure [1][2][3]. The rapid digitalization of society has greatly promoted the rise and progress of intelligent road transport systems.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Signal Response Characteristic of Piezoelectric Energy Harvesters Embedded in Pavement

et al. 2020

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Piezoelectric pavement energy harvesting is a technological approach to transform mechanical energy into electrical energy. When a piezoelectric energy harvester (PEH) is embedded in asphalt pavements or concrete pavements, it is subjected to traffic loads and generates electricity. The wander of the tire load and the positioning of the PEH affect the power generation; however, they were seldom comprehensively investigated until now. In this paper, a numerical study on the influence of embedding depth of the PEH and the horizontal distance between a tire load and the PEH on piezoelectric power generation is presented. The result shows that the relative position between the PEH and the load influences the voltage magnitude, and different modes of stress state change voltage polarity. Two mathematic correlations between the embedding depth, the horizontal distance, and the generated voltage were fitted based on the computational results. This study can be used to estimate the power generation efficiency, and thus offer basic information for further development to improve the practical design of PEHs in an asphalt pavement.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Signal Response Characteristic of Piezoelectric Energy Harvesters Embedded in Pavement

et al. 2020

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“…It is necessary to conduct timely and high-efficient removal of ice and snow to avoid the adverse effect of deicing fluid and machinery on the airport asphalt pavement [1]. Some scholars study how to improve the performance of bitumen and asphalt mixture to avoid negative effect [2][3][4]. At the same time, some methods of deicing and melting snow on the pavement have been researched, such as asphalt mixture containing the snow-melting agent [5], hydraulic heating system [6][7][8][9][10], electrically conductive concrete [11][12][13], carbon fiber grille [14], and CFHW [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Research of Deicing and Melting Snow on Airport Asphalt Pavement by Carbon Fiber Heating Wire

Su¹,

Lai²,

Yan³

et al. 2020

Advances in Materials Science and Engineering

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In the paper, the method of deicing and melting snow by the carbon fiber heating wire (CFHW) embedded in the airport asphalt pavement is proposed to improve the security of airport operation. The field experiment of deicing and melting snow on the airport asphalt pavement is conducted. Deicing and melting snow, asphalt pavement temperature, ice-free area ratio, and snow-free area ratio are analyzed. Electrical power with 350 W/m2 is input to the airport asphalt pavement for deicing and melting snow by the CFHW. In the experiment, 3 mm ice can be melted, and the average infrared ray temperature (IRT) of the airport asphalt pavement surface can achieve an increment of 13.0°C in 2.5 hours when the air temperature is from −7.5°C to −2.2°C. Snow with 3.2 mm precipitation can be melted in 2 hours when the air temperature is from −4.8°C to −3.5°C, and the asphalt pavement temperature can achieve an increment of 5.9°C at the depth of 0.5 cm. The results show that the method of deicing and melting snow on the airport asphalt pavement by the CFHW is practicable in the cold zone.

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“…With the development of nanotechnology, an increasing number of scholars have begun to study the application of nanomaterials in asphalt modification [6]. Carbon nanomaterials have a large specific surface area, which can effectively improve the performance of asphalt binders [7,8]. Xiao and authors utilized this material to modify base asphalt and found that nanocarbon can substantially improve the viscoelastic properties and antiaging properties of asphalt binder [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Research on the Influence of Nanocarbon/Copolymer SBS/Rubber Powder Composite Modification on the Properties of Asphalt and Mixtures

Zhao

Xie

et al. 2020

Advances in Materials Science and Engineering

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To expand the application range of modified asphalt and mixtures and effectively reduce the aggregation of nanomaterials in asphalt, nanocarbon/styrene butadiene styrene (SBS)/rubber powder composite-modified asphalt is proposed. This paper presents a laboratory study on the performance of nanocarbon/copolymer SBS/rubber powder composite-modified asphalt, and nanocarbon particles modified by titanate coupling agents as modifiers are selected. The nanocarbon/copolymer SBS/rubber powder composite-modified asphalt was prepared by a high-speed shearing method. The physical properties and rheological performance were assessed using ductility tests, softening point tests, penetration tests, dynamic shear rheometer (DSR) tests, and bending beam rheometer (BBR) tests. Furthermore, the mixture properties, including the high-temperature stability, low-temperature cracking resistance, moisture stability, and freeze-thaw splitting, were evaluated in the laboratory. The micromorphology of the base asphalt and composite-modified asphalt was examined by scanning electron microscopy (SEM), and the reactions between the modifiers and AH-70 base asphalt were studied by Fourier transform infrared spectroscopy (FTIR). The results reveal that the surface-modified nanocarbon and rubber powder additives substantially increased the softening point and penetration index of the base asphalt, with little obvious influence on the low-temperature performance. In addition, when nanocarbon/copolymer SBS/rubber powder composite-modified asphalt was used, the high-temperature stability and low-temperature cracking resistance of the nanocarbon/copolymer SBS/rubber powder composite-modified asphalt mixture were approximately 1.3 times those of the nanocarbon/rubber powder asphalt mixture. In terms of the micromorphology and reaction, the addition of the nanocarbon can increase the compatibility between the base asphalt and rubber powder, and then the addition of copolymer SBS can improve the structure of nanocarbon (after surface modification)/rubber powder-modified asphalt to form a stable network. Moreover, the physical reaction plays the dominant role in the modification process for the rubber powder and base asphalt, and chemical reactions occur in the modification process for the surface-modified nanocarbon and base asphalt.

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Performance evaluation of bitumen with a homogeneous dispersion of carbon nanotubes

Cited by 59 publications

References 38 publications

Numerical Analysis of Signal Response Characteristic of Piezoelectric Energy Harvesters Embedded in Pavement

Numerical Analysis of Signal Response Characteristic of Piezoelectric Energy Harvesters Embedded in Pavement

Research of Deicing and Melting Snow on Airport Asphalt Pavement by Carbon Fiber Heating Wire

Research on the Influence of Nanocarbon/Copolymer SBS/Rubber Powder Composite Modification on the Properties of Asphalt and Mixtures

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