Comparison of Asphalt Ultraviolet Radiation Aging with other Aging Types by Infrared Adsorption Spectrum

Wu, Huai Rui; Wu, Jin Ting; Ye, Fen

doi:10.4028/www.scientific.net/amm.105-107.943

Cited by 2 publications

(6 citation statements)

References 14 publications

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“…As a result. the chemical bonds are broken and the asphaltenes component is formed by saturates, aromatics, and resins [45]. From Table 9, it can be seen that the carbonyl index and sulfoxide index of the matrix asphalt, WEO modified asphalt, and WPE modified asphalt are all increased after the UV aging experiment.…”

Section: Ftir Analysismentioning

confidence: 98%

The Effect of Waste Engine Oil and Waste Polyethylene on UV Aging Resistance of Asphalt

et al. 2020

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Waste engine oil (WEO) and waste polyethylene (WPE) are two common wastes, which are easy to pollute the environment. As the primary material in road construction, natural asphalt is a non-renewable energy source and asphalt is vulnerable to ultraviolet (UV) radiation during the service life. It results in degradation of asphalt pavement performance. In this paper, 2 wt % to 8 wt % of WEO and WPE were used to modify asphalts and the UV aging simulation experiment was carried out. The physical parameters of asphalts before the UV aging experiment show that the asphalt containing 4 wt % WPE and 6 wt % WEO mixture (4 wt % WPE + 6 wt % WEO) has similar physical properties with that of the matrix asphalt. Besides, gel permeation chromatography (GPC) verifies that the molecular weight distribution of the asphalt containing 4 wt % WPE + 6 wt % WEO is close to that of the matrix asphalt. The storage stability test shows that 4 wt % WPE + 6 wt % WEO has good compatibility with the matrix asphalt. The functional groups and micro-morphology of asphalts before and after the UV aging experiment were investigated by Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM). FTIR results display that 4 wt % WPE + 6 wt % WEO can effectively reduce the formation of carbonyl and sulfoxide functional groups. AFM shows that 4 wt % WPE + 6 wt % WEO can also retard the formation of a "bee-like" structure in asphalt after the UV aging experiment. Based on the above results, it can be concluded that WEO and WPE mixture can replace part of asphalt and improve the UV aging resistance of asphalt.

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Section: Ftir Analysismentioning

confidence: 98%

The Effect of Waste Engine Oil and Waste Polyethylene on UV Aging Resistance of Asphalt

et al. 2020

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“…In fact, a strong UV effect is one of the primary natural factors of pavement damage, and the aging consequence and mechanism are different from those of TO aging. The oxidation speed of UV radiation aging for asphalt is 1.80, which is 6.23 times that of TO aging 12 . Research on the UV aging of asphalt pavement is relatively mature 13–17 .…”

Section: Introductionmentioning

confidence: 98%

“…The oxidation speed of UV radiation aging for asphalt is 1.80, which is 6.23 times that of TO aging. 12 Research on the UV aging of asphalt pavement is relatively mature. [13][14][15][16][17] A UV radiation aging gradient is known to exist in asphalt binders, 18,19 and vertical gradients of molecular sizes and oxidation product contents tend to form in asphalt films as the UV aging process proceeds.…”

Section: Introductionmentioning

confidence: 99%

“…[19][20][21][22] Asphalt performance variations exhibit a close relationship with aging time and asphalt type. 12,23 After UV radiation aging, asphalt turns from sol-type to gel-type and other aging types, and the viscosity decreases while the elasticity increases markedly. 12,24 Different from the TO aging mechanism of thermal decomposition, UV-aged asphalt undergoes a photooxidation reaction, unsaturated carbon chains in asphalt are oxidized to C O, and sulfur is oxidized to S O.…”

Section: Introductionmentioning

confidence: 99%

“…12,23 After UV radiation aging, asphalt turns from sol-type to gel-type and other aging types, and the viscosity decreases while the elasticity increases markedly. 12,24 Different from the TO aging mechanism of thermal decomposition, UV-aged asphalt undergoes a photooxidation reaction, unsaturated carbon chains in asphalt are oxidized to C O, and sulfur is oxidized to S O. 20,24 For ER, UV aging only affects the surface layer, resulting in a decrease in mechanical properties, such as flexural strength and impact strength, and impairs the interface of the outermost layer.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

UV aging behavior and mechanism of cold‐mixed epoxy asphalt

Jiang,

Si,

Zhang

et al. 2023

Vinyl Additive Technology

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In environmental conditions, the ultraviolet (UV) light from sunshine will trigger epoxy asphalt (EA) paving materials aging and performance reduction. This work studied the influence of UV aging on the structure and mechanical performance of cold‐mixed epoxy asphalt (CEA) to evaluate its aging mechanism. The chemical structure of CEA was tested by Fourier transform infrared spectra, X‐ray photoelectron spectroscopy, and micromorphology was observed through fluorescence microscopy. The mechanical properties of CEA were studied by tensile tests and dynamic mechanical analysis. The results indicated that the toughness of CEA went down due to UV aging, and the elongation at break and glass transition temperature decreased by 35.5% and 6.0°C, respectively. Based on structural analysis, the UV aging mechanism of CEA was summarized as follows: (1) the curing network of epoxy resin was partially broken, and the asphalt particle aggregated; (2) the asphalt and epoxy resin in UV aging‐CEA were oxidized and formed carbonyl group and sulfonic group.Highlights Both asphalt and ER components in CEA underwent oxidation reactions and formed more CO, SO, and CO groups. UV‐CEA showed a decrease in toughness due to destruction of the cured ER cross‐linked network and shortening of the asphalt molecular chain E' and Tg of UV‐CEA was decreased, resulting from a decrease in ER crosslink density and an increase in molecular chain segment mobility of ER and asphalt.

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Comparison of Asphalt Ultraviolet Radiation Aging with other Aging Types by Infrared Adsorption Spectrum

Cited by 2 publications

References 14 publications

The Effect of Waste Engine Oil and Waste Polyethylene on UV Aging Resistance of Asphalt

The Effect of Waste Engine Oil and Waste Polyethylene on UV Aging Resistance of Asphalt

UV aging behavior and mechanism of cold‐mixed epoxy asphalt

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