Evolution and locational variation of asphalt binder aging in long-life hot-mix asphalt pavements

Wang, P.E. Yuhong; Wen, Yong; Zhao, Kecheng; Chong, Dan; Wong, Alvin S.T.

doi:10.1016/j.conbuildmat.2014.05.091

Cited by 67 publications

(9 citation statements)

References 11 publications

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“…Compared to the unaged PRM-modified bitumen, it was observed that PRM-70 and PRM-90 have larger G* values after aging. For PRM-modified bitumen aged by PAV, G* is higher than the samples aged by RTFOT and UV, which implies the highest age hardening degree was caused by the oxidation and volatilization of light compounds of bitumen [28]. With respect to the phase angle, the variation of δ shows more complex behaviors.…”

Section: Rheological Analysis 331 Temperature Sweepsmentioning

confidence: 93%

Study on the Aging Resistance of Polyurethane Precursor Modified Bitumen and its Mechanism

Zhang¹,

Li²,

Hu³

et al. 2021

Sustainability

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As an environmentally friendly alternative for the production of high-performance modified asphalt by chemical reactions, a liquid-state polyurethane-precursor-based reactive modifier (PRM) was developed and employed in the asphalt modification. In contrast to the traditional solid bitumen modifier, for example, rubber and thermoplastic elastomers, the PRM as a liquid modifier has more significant advantages in reducing energy consumption and improving asphalt performance, which has attracted widespread attention. However, the aging resistance and its mechanism are not clear. In view of this, the aging performance of two PRM-modified bitumen (PRM-70 and PRM-90), under the short-term thermo-oxidative aging, long-term thermo-oxidative aging, and ultraviolet (UV) aging conditions, was investigated through chemical and mechanical methods. The results show that the PRM-90 is more susceptible to the thermos-oxidative aging and UV aging. The use of low-penetration-grade bitumen and ensuring an adequate reaction are beneficial to enhance the aging resistance of PRM-modified bitumen. The impact of aging on high-temperature performance of PRM-modified bitumen is great, followed by the low-temperature performance and the anti-fatigue performance. The mechanic-relevant rheological aging index (RAI) and fracture energy index (FEI) are recommended to evaluate aging properties for PRM-modified bitumen. This study not only provides support for further research on the relationship between the aging properties and mechanical performance of PRM-modified bitumen, but also provides a reference for conducting mechanism analysis.

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Section: Rheological Analysis 331 Temperature Sweepsmentioning

confidence: 93%

Study on the Aging Resistance of Polyurethane Precursor Modified Bitumen and its Mechanism

Zhang¹,

Li²,

Hu³

et al. 2021

Sustainability

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show abstract

“…During the pavement service process, asphalt pavement shows cracks, peeling, and other diseases under the combined effect of load, temperature, oxygen, ultraviolet, and humidity 1,2 . The thermal oxidative aging of asphalt binder caused by high temperature and oxygen is an important reason for the destruction in asphalt pavement performance 3 .…”

Section: Intruductionmentioning

confidence: 99%

Research on the thermal oxygen aging mechanism of the composite curing system epoxy asphalt with different curing agent proportions on the molecular scale

Min

Shi

et al. 2023

J of Applied Polymer Sci

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To study the influence of the cross‐linking network on the thermal oxygen aging performance of the epoxy asphalt, the laser copolymerization microscopy, Fourier transform infrared spectroscopy and element analysis tests were used to characterize the changes in chemical components of epoxy asphalt with composite curing system during thermal oxygen aging. According to the changes in chemical components, the epoxy asphalt molecular models were constructed. The diffusion behavior of oxygen atoms was analyzed, the aging degree was determined. Moreover, the Tg and radial distribution function were calculated to determine the effect of aging on the low‐temperature performance and component distribution of epoxy asphalt. The results show that a proper proportion of curing agent helped to uniform distribution of the asphalt phase. The rise in anhydride curing agent content increased the density of crosslinking network, limited the diffusion of oxygen atoms, and contributed to the resistance of epoxy asphalt chemical components to thermal oxygen aging. However, the high proportion of anhydride aggravated the oxidation reaction of the asphalt phase due to the uneven coating of the asphalt phase. After thermal oxygen aging, the distribution of asphaltene and epoxy resin phase showed a concomitant phenomenon due to polarity adsorption.

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“…Bitumen is one of the main components of asphalt pavements and consists of a vast number of organic molecules [1]. Due to its organic constituents bitumen is prone to oxidation during exposure to mixing and environmental conditions [2]. Albeit other irreversible physicochemical processes take place in bitumen (volatilisation and condensation), oxidative ageing is considered of utmost importance since it generally deteriorates the pavement performance [3,4].…”

Section: Introductionmentioning

confidence: 99%

Exploring the oxidative mechanisms of bitumen after laboratory short- and long-term ageing

Pipintakos

Soenen²,

Ching

et al. 2021

Construction and Building Materials

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Evolution and locational variation of asphalt binder aging in long-life hot-mix asphalt pavements

Cited by 67 publications

References 11 publications

Study on the Aging Resistance of Polyurethane Precursor Modified Bitumen and its Mechanism

Study on the Aging Resistance of Polyurethane Precursor Modified Bitumen and its Mechanism

Research on the thermal oxygen aging mechanism of the composite curing system epoxy asphalt with different curing agent proportions on the molecular scale

Exploring the oxidative mechanisms of bitumen after laboratory short- and long-term ageing

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