Aging effects of ultraviolet lights with same dominant wavelength and different wavelength ranges on a hydrocarbon-based polymer (asphalt)

Li, Yuanyuan; Wu, Shaopeng; Liu, Quantao; Xie, Jun; Li, Hechuan; Dai, Ying; Li, Chuangmin; Nie, Shuai; Song, Wei

doi:10.1016/j.polymertesting.2019.01.025

Cited by 52 publications

(19 citation statements)

References 34 publications

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“…UV radiation has attracted more and more focus for its significant aging effects on the asphalt materials [5]. After UV aging, the elemental ratios and chemical components of asphalt binder are changed [6], which results in the deterioration of physical and rheological performance of asphalt binder and the pavement performance of its concrete [7,8,9]. Especially for the areas with high intensity of UV radiation, the aging effect is more obvious [10].…”

Section: Introductionmentioning

confidence: 99%

The Effect of UV Irradiation on the Chemical Structure, Mechanical and Self-Healing Properties of Asphalt Mixture

et al. 2019

Materials

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Although huge numbers of investigations have been conducted for the ultraviolet (UV) aging of asphalt binder, research rarely focuses on the asphalt mixture. In order to evaluate the aging effect of UV radiation on the asphalt mixture, a dense grade of asphalt mixture was designated and aged by UV radiation for 7, 14 and 28 days respectively. After that, the chemical functional groups of asphalt binder were tested by Fourier transform infrared spectrometer (FTIR). The semi-circular bending strength and fatigue resistance of asphalt concrete were tested to characterize the mechanical properties of the asphalt concrete. To evaluate the self-healing effect of the macro-structure continuity of asphalt concrete intuitively, the computed tomography (CT) scanning machine was used to characterize the crack size of asphalt concrete samples both before and after self-healing. The results show that, with the increase of UV irradiation time, the relative ratios of the C=O and S=O bands’ areas of recovered asphalt binder increase significantly. UV radiation can significantly weaken the mechanical and self-healing properties of asphalt mixture, making the asphalt mixture to have worse macro-structure continuity, lower failure strength and worse fatigue resistance. Moreover, the longer the UV irradiation time is, the degradation effect of UV radiation on asphalt mixture becomes more obvious.

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Section: Introductionmentioning

confidence: 99%

The Effect of UV Irradiation on the Chemical Structure, Mechanical and Self-Healing Properties of Asphalt Mixture

et al. 2019

Materials

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“…It was found that the diffusion rate of S in the aged asphalt was greater than that in the virgin asphalt. After the aging process, the number of pores in the asphalt increased, which was conducive to the diffusion of S. In addition, the content of heavy components (such as asphaltene) also increased, and the content of light components decreased [32][33][34]; therefore, the concentration of light components in the aged asphalt was lower than that of the virgin asphalt. Under the effect of the increased porosity and the concentration difference, S exhibited a faster diffusion in the aged asphalt.…”

Section: Discussionmentioning

confidence: 99%

The Properties of Different Healing Agents Considering the Micro-Self-Healing Process of Asphalt with Encapsulations

et al. 2020

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Improving the self-healing performance of asphalt by employing encapsulation technology is a topic of wide interest. This study investigated the performance of sunflower oil, engine oil, and waste cooking oil based on the microhealing mechanism of asphalt with compartmented polymeric fiber. Capillary flow, contact angle, Brookfield viscosity, bar thin layer chromatography, and fatigue–recovery–fatigue tests were conducted to characterize the capillary flow capacity, wetting ability, viscosity reduction ability, suitability of components, and performance restoration ability of the different kinds of healing agents. The diffusion process of sunflower oil in asphalt was simulated using molecular dynamics. The results showed that sunflower oil exhibited the best capillary flow capacity, viscosity reduction ability, and the fastest wetting rate in asphalt. Engine oil exhibited the largest wetting work and the best recovery performance related to fatigue. The diffusion process of sunflower oil in asphalt could be divided into two stages. Two major factors (aging and higher temperature) increased the diffusion rate of sunflower oil in asphalt. The comprehensive analysis showed that sunflower oil was the most suitable to be encapsulated to improve the self-healing performance of asphalt.

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“…e main spectrum of the highpressure mercury lamp is 365.0 nm wavelength ultraviolet light, and its wave had the most obvious ageing effect on the asphalt binder [35,36]. To prevent the asphalt from thermal ageing and maintain it at 35°C in the UV ageing oven, the 200 W axial flow blower was used to supply sufficient cold air, and the 100 W exhaust fan in the top of the oven was used to discharge warm air [37,38].…”

Section: Uv Aging Testmentioning

confidence: 99%

Research on the Properties of Low Temperature and Anti‐UV of Asphalt with Nano‐ZnO/Nano‐TiO₂/Copolymer SBS Composite Modified in High‐Altitude Areas

Xie

Tao

Han

et al. 2020

Advances in Materials Science and Engineering

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Strong ultraviolet light and low-temperature are the typical environmental characteristics in high-altitude areas. The performance of SBS-modified asphalt in the above environmental characteristics needs further study. To improve the resistance ultraviolet (UV) ageing and low-temperature performance of copolymer- (SBS-) modified asphalt, an SBS-modified asphalt containing nano-ZnO and nano-TiO2 is proposed. In this paper, nano-ZnO, nano-TiO2, and SBS were used as modifiers with the silane coupling agent (KH-560) as the nanomaterial surface modification. The orthogonal test table was used to analyse the effects of the three modifiers on the physical properties of modified asphalt at different dosages. On this basis, the physical properties, low-temperature properties, and ageing indices (carbonyl index and sulfoxide index) were studied for base asphalt, SBS-modified asphalt, nano-ZnO/SBS-modified asphalt, and nano-ZnO/nano-TiO2/SBS composite-modified asphalt before and after photoaging. The content changes of characteristic elements (Zn and Ti) in the nano-ZnO/nano-TiO2/SBS composite-modified asphalt before and after ageing were studied by scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS), and the UV ageing mechanism was revealed. The results indicate that two nanoparticles show the best compatibility with asphalt after surface modification and can improve the binding ability between SBS and base asphalt. The orthogonal test analysis shows that nano-ZnO has a highly significant effect on the low- and high-temperature performance of the nano-ZnO/nano-TiO2/SBS composite-modified asphalt, and nano-TiO2 has a significant effect on the high-temperature performance. Three optimal composite-modified systems for base asphalt including 4% nano-ZnO/1.5% nano-TiO2/3.2% SBS were proposed and had the best antiaging ability. Compared with the sulfoxide index, the carbonyl index changed most obviously before and after ageing. Additionally, the results reveal that nano-TiO2 has a good absorption effect at a wavelength of 365 nm (ultraviolet light), while nano-ZnO is liable to photolysis, and its activity decreases at this wavelength.

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Aging effects of ultraviolet lights with same dominant wavelength and different wavelength ranges on a hydrocarbon-based polymer (asphalt)

Cited by 52 publications

References 34 publications

The Effect of UV Irradiation on the Chemical Structure, Mechanical and Self-Healing Properties of Asphalt Mixture

The Effect of UV Irradiation on the Chemical Structure, Mechanical and Self-Healing Properties of Asphalt Mixture

The Properties of Different Healing Agents Considering the Micro-Self-Healing Process of Asphalt with Encapsulations

Research on the Properties of Low Temperature and Anti‐UV of Asphalt with Nano‐ZnO/Nano‐TiO₂/Copolymer SBS Composite Modified in High‐Altitude Areas

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Aging effects of ultraviolet lights with same dominant wavelength and different wavelength ranges on a hydrocarbon-based polymer (asphalt)

Cited by 52 publications

References 34 publications

The Effect of UV Irradiation on the Chemical Structure, Mechanical and Self-Healing Properties of Asphalt Mixture

The Effect of UV Irradiation on the Chemical Structure, Mechanical and Self-Healing Properties of Asphalt Mixture

The Properties of Different Healing Agents Considering the Micro-Self-Healing Process of Asphalt with Encapsulations

Research on the Properties of Low Temperature and Anti‐UV of Asphalt with Nano‐ZnO/Nano‐TiO2/Copolymer SBS Composite Modified in High‐Altitude Areas

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Research on the Properties of Low Temperature and Anti‐UV of Asphalt with Nano‐ZnO/Nano‐TiO₂/Copolymer SBS Composite Modified in High‐Altitude Areas