Effect of ultraviolet (UV) aging on rheology properties and microstructure of polyurethane (PU) modified asphalt

Fang, Jinmiao; Tu, Jinsong

doi:10.1088/2053-1591/ab558f

Cited by 27 publications

(18 citation statements)

References 29 publications

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“…Recent decades have seen a significant amount of research on the effects of UV aging on the chemical and physical properties of asphalt [1]2], with UV aging having a more detrimental influence on asphalt qualities than thermal aging [3]. UV aging primarily affects the low-temperature characteristics of asphalt, negatively impacting both its high-temperature and low-temperature performance [4]5]. It has also been shown by numerous studies that UV irradiation affects the rheological characteristics of asphalt samples [6]9].…”

Section: Introductionmentioning

confidence: 99%

Study on asphalt damage characteristics in cold area with large temperature gradient

Tan,

Ke,

Wang

2024

J. Phys.: Conf. Ser.

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The primary cause of the asphalt pavement disease in this region is the large temperature differential and high ultraviolet (UV) radiation that characterize this frigid environment. This study assessed the ductility, penetration, softening point, and rheological properties of several asphalts under various freeze-thaw cycles and UV aging conditions. Additionally, the damage characteristics of asphalt in cold and large temperature gradient areas were examined. The findings indicate that the freeze-thaw cycle significantly affects the asphalt’s low-temperature crack resistance but has no discernible effect on the material’s traditional performance or high-temperature rutting resistance. Asphalt’s resistance to low temperature cracking is ranked according to the impacts of UV radiation and the freeze-thaw cycle: 80/100 pen grade asphalt, 100/120 pen grade asphalt, SBS modified asphalt, and SBR modified asphalt. The impact of UV radiation and the freeze-thaw cycle on the high temperature performance of asphalt is categorized into four categories: SBR modified asphalt, SBS modified asphalt, 80/100 pen grade asphalt, and 100/120 pen grade asphalt.

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Section: Introductionmentioning

confidence: 99%

Study on asphalt damage characteristics in cold area with large temperature gradient

Tan,

Ke,

Wang

2024

J. Phys.: Conf. Ser.

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“…Sun et al [ 12 ] evaluated the properties and functional groups of PU through the Brookfield rotational viscosity test, Fourier transform infrared spectroscopy (FTIR), and dynamic mechanical analysis. Fang et al [ 13 ] used physical property tests (penetration and ductility), dynamic shear rheology (DSR), and atomic force microscopy (AFM) test to evaluate the effect of UV aging on the performance of PU‐modified asphalt. Awazhar et al [ 14 ] analyzed the compatibility and storage stability of Cecabase–PU composite modified asphalt by conducting oven heating and softening point tests.…”

Section: Introductionmentioning

confidence: 99%

Mechanical performance analysis of polyurethane‐modified asphalt using molecular dynamics method

Huang

Shen

et al. 2021

Polymer Engineering & Sci

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In this study, the mechanical performance of polyurethane (PU)‐modified asphalt was investigated. To this end, the molecular dynamics method was adopted to study the influence of the PU modifier on the compatibility, mechanical properties, and structure of asphalt. Using the Materials Studio software, a four‐component molecular model of asphalt, a PU molecular model, and an asphalt–PU mixed system model were constructed, and the molecular density and glass transition temperature (Tg) were used to verify the performance of the aforementioned models. Molecular dynamics simulations of the three molecular models were conducted under different temperatures, and the solubility parameter (δ), interaction energy, mechanical properties, and radial distribution functions (RDFs) were obtained. The results showed that at 413.15 K (140°C), the difference between the solubility parameters of the asphalt and PU molecules (∆δ) is the smallest, and their interaction reaches the most optimal phase state. The effects of the PU modifier on the Young's modulus, bulk modulus, and shear modulus of asphalt were studied. Finally, the RDF analysis showed that the PU modifier has a direct effect on the degree of swelling and dispersion between the aromatic–aromatic and saturate–saturate components in the asphalt, reducing the aggregation of both molecules. This verifies the PU modification effect.

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“…On the macro level, it is an evaluation of various performance indicators of the aged asphalt binder. From the microscopic point of view, most of them currently use infrared spectroscopy, scanning electron microscope, fluorescence microscope, atomic force microscope and other methods [18][19][20][21][22][23]. Except for infrared spectroscopy, most of the microscopic experiments are to study the microscopic surface morphology of asphalt binder after aging, and rarely involve the transformation of microscopic molecular chains.…”

Section: Introductionmentioning

confidence: 99%

Study on Ultraviolet Aging Mechanism of Carbon Nanotubes/SBS Composite-Modified Asphalt in Two-Dimensional Infrared Correlation Spectroscopy

Zheng

Xie

2021

Materials

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In order to explore the influence mechanism of carbon nanotubes on the ultraviolet (UV) aging properties of the SBS-modified asphalt binder, the changes of functional groups in the one-dimensional infrared spectrum and two-dimensional infrared correlation spectrum are studied in this paper. The results show that the UV aging process of the SBS-modified asphalt binder is the process of alkane chain cleavage and reorganization, the formation of oxygen-containing functional groups and decomposition of SBS. The incorporation of carbon nanotubes can reduce the mutual conversion of methyl and methylene functional groups, inhibit the decomposition of butadiene and the destruction of C = C double bonds in SBS. The degradation of SBS during the process of UV aging leads to the change of many functional groups and acceleration of the aging of the SBS-modified asphalt binder. The addition of carbon nanotubes can effectively alleviate the degradation of SBS and the formation of oxygen-containing functional groups at the early stage of UV aging, and reduce the influence of these two changes on other functional groups; thus, improving the anti-aging performance of the SBS-modified asphalt binder.

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Effect of ultraviolet (UV) aging on rheology properties and microstructure of polyurethane (PU) modified asphalt

Cited by 27 publications

References 29 publications

Study on asphalt damage characteristics in cold area with large temperature gradient

Study on asphalt damage characteristics in cold area with large temperature gradient

Mechanical performance analysis of polyurethane‐modified asphalt using molecular dynamics method

Study on Ultraviolet Aging Mechanism of Carbon Nanotubes/SBS Composite-Modified Asphalt in Two-Dimensional Infrared Correlation Spectroscopy

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