Road Performance and Emission Reduction Effect of Graphene/Tourmaline-Composite-Modified Asphalt

Guo, Tengteng; Fu, Hao; Wang, Chaohui; Chen, Haijun; Qian, Chen; Wang, Qing; Chen, Yuanzhao; Li, Zhenxia; Chen, Aijiu

doi:10.3390/su13168932

Cited by 13 publications

(4 citation statements)

References 30 publications

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“…In comparison to tourmaline micropowder modified asphalt, the GTCM-modified asphalt showed an improvement of 8.60% in 25 • C penetration residual ratio and 57.58% in softening point increment. The high-temperature stability of asphalt changed with GTCM is superior to asphalt modified with tourmaline micropowder under the same circumstances, that is, GTCMmodified asphalt had much better temperature sensitivity, high-temperature resistance, and anti-aging capabilities than tourmaline-modified asphalt, and as the amount of graphene micropowder rose, the improving impact steadily grew, which has been proved in the existing research [21,30,31]. It is shown in Figure 7.…”

Section: Basic Performancementioning

confidence: 81%

Rheological Properties of Composite Inorganic Micropowder Asphalt Mastic

et al. 2023

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Graphene Tourmaline Composite Micropowder (hereinafter referred to as GTCM) modified asphalt was prepared by the ball milling method. The effects of different temperatures and different frequencies on the high-temperature performance of composite-modified asphalt were evaluated by dynamic shear rheological test, and the viscoelastic properties of composite-modified asphalt under different stresses and different temperatures were analyzed. The low-temperature rheological properties of GTCM-modified asphalt were analyzed by bending beam rheological test, and its mechanism was analyzed by Fourier transform infrared spectroscopy (FTIR) test. The results show that the temperature sensitivity and anti-aging resistance of GTCM-modified asphalt are significantly higher than that of tourmaline-modified asphalt. The improvement effect gradually increases with the increase in graphene powder content, and its addition does not change the viscoelastic properties of asphalt. The complex shear modulus and phase angle of GTCM-modified asphalt at appropriate temperatures are more conducive to tourmaline-modified asphalt and matrix asphalt, which can improve the rutting resistance of asphalt. In the same type, with the increase in composite modified micropowder content, the rutting resistance of modified asphalt is better. The improvement of rutting resistance of GTCM-0.5, GTCM-1.0 and GTCM-1.5-modified asphalt can reach 12.95%, 10.12% and 24.25%, respectively; the improvement range is more complicated due to temperature and frequency changes. The GTCM-modified asphalt has good low-temperature crack resistance. The creep stiffness modulus of GTCM-modified asphalt decreases with the increase in load time under different types and dosages, and its stiffness modulus is smaller than that of tourmaline-modified asphalt and mineral powder asphalt mastic. The creep rate increases with the extension of load time, which is greater than that of tourmaline-modified asphalt and mineral powder asphalt mastic. When the load was 60 s, the creep stiffness modulus of GTCM-0.5, GTCM-1.0 and GTCM-1.5-modified asphalt decreased by 5.75%, 6.97% and 13.73%, respectively, and the creep rate increased by 1.37%, 2.52% and 4.35%, respectively. After adding GTCM or tourmaline to the matrix asphalt, no new functional groups were produced due to the chemical reaction with the asphalt.

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Section: Basic Performancementioning

confidence: 81%

Rheological Properties of Composite Inorganic Micropowder Asphalt Mastic

et al. 2023

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“…Nanomaterials have been the subject of much research in recent years, and this is motivated by their superior mechanical properties and new applications in nanoscience, nanomanufacturing, and smart nanostructure technologies. There are different nanostructures among which graphene sheets have been of high interest to researchers due to a wide range of applications [1][2][3][4][5][6]. However, there are always complications in the design, manufacturing, and health monitoring of such structures on this scale.…”

Section: Introductionmentioning

confidence: 99%

Wave Analysis of Thick Rectangular Graphene Sheets: Thickness and Small-Scale Effects on Natural and Bifurcation Frequencies

2022

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Free vibration and wave analysis of thick rectangular graphene are studied by employing the wave propagation method. To consider small-scale effects and thickness of a plate in nanoscales, equations of motions are represented by the Eringen nonlocal theory coupled with the Mindlin plate theory of thick plates. To solve the governing equations of motion with the wave propagation technique, propagation and reflection matrices are derived. These matrices are combined to obtain exact natural frequencies of graphene sheets for all six possible boundary conditions. To check the accuracy and reliability of the method, natural frequencies are compared with the results of the literature, and excellent agreement is observed. Additionally, wave analysis of the graphene sheet is performed and different types of waves in the graphene sheet are captured. Deriving the dispersion relation of the graphene sheet, bifurcation frequencies (cut-off and escape frequencies) are analytically found. Finally, the effects of graphene sheet thickness and nonlocal parameter on the natural frequencies and bifurcation frequencies are investigated. It is observed that natural frequencies are highly dependent on the graphene sheet’s thickness and nonlocal parameter. More importantly, the number and order of bifurcation frequencies depend on these two parameters as well. Our findings are valuable for the sustainable design and fabrication of graphene-based sensors, in which structural health monitoring of embedded graphene sheets is of great importance.

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“…However, asphalt is a temperature-sensitive material, which makes asphalt mixtures prone to rutting, cracks, water damage, and other forms of damage that can affect their service life [2]. Furthermore, hot-mix asphalt mixtures consume significant amounts of fuel to heat mineral aggregates and asphalt during the production process [3]. A large amount of carbon dioxide, sulfur dioxide, PM2.5 dust, and smoke are also emitted into the atmosphere during the construction process, which imposes a significant burden on the surrounding environment [1,3].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, hot-mix asphalt mixtures consume significant amounts of fuel to heat mineral aggregates and asphalt during the production process [3]. A large amount of carbon dioxide, sulfur dioxide, PM2.5 dust, and smoke are also emitted into the atmosphere during the construction process, which imposes a significant burden on the surrounding environment [1,3]. Therefore, new energy-saving and emission-reducing green pavement construction materials are required for the aforementioned special types of road [4].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Polyurethane Binder Curing Reaction and Evaluation of Polyurethane Mixture Properties

Sun

Zhuang

et al. 2021

Coatings

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This study focuses on analyzing the curing reaction mechanism of polyurethane (PU) binders and comprehensively evaluating the PU mixture’s properties. The former was investigated by conducting a Fourier transform infrared spectroscopy (FTIR) test on PU binders with different curing times. The volume change characteristics, construction operation time, and strength formation law were clarified through the splitting tensile test of PU mixtures under different environmental conditions. The optimal PU mixture stacking time and curing time under different environmental conditions were determined. The properties of the PU mixture and asphalt mixture were evaluated and compared through a rutting test, low-temperature bending test, freeze–thaw splitting test, and four-point bending fatigue test. The results show that the physical and chemical curing of the PU binder occurred within the first 24 h of curing, and the reaction speed gradually accelerated to form a polyurea structure 24 h later. It is recommended to stack the PU mixture for 4 h before compaction and to cure it for 2 days before opening under the conditions of 50% humidity and 15–40 °C surrounding temperature. The PU mixture shows better temperature stability and fatigue resistance than the asphalt mixture, and the splitting tensile strength of the PU mixture before and after the freeze–thaw splitting test is also higher. It is clear that the PU mixture is a green road building material with good performance.

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Road Performance and Emission Reduction Effect of Graphene/Tourmaline-Composite-Modified Asphalt

Cited by 13 publications

References 30 publications

Rheological Properties of Composite Inorganic Micropowder Asphalt Mastic

Rheological Properties of Composite Inorganic Micropowder Asphalt Mastic

Wave Analysis of Thick Rectangular Graphene Sheets: Thickness and Small-Scale Effects on Natural and Bifurcation Frequencies

Mechanism of Polyurethane Binder Curing Reaction and Evaluation of Polyurethane Mixture Properties

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