Impact of asphalt aging temperature on chemo-mechanics

Poulikakos, Lily D.; Falchetto, Augusto Cannone; Wang, Di; Porot, Laurent; Hofko, Bernhard

doi:10.1039/c9ra00645a

Cited by 61 publications

(13 citation statements)

References 25 publications

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“…In previous studies, efforts have been made to correlate the oxidation products, mainly ketone and sulfoxide, with the mechanical parameters of bitumen, e.g., softening point, viscosity, complex shear modulus, phase angle, etc. [34,35]. This socalled chemo-mechanics correlation will be beneficial to understand the dependence of mechanical properties of binders on their chemical composition.…”

Section: Chemo-mechanics Of Agingmentioning

confidence: 99%

Effect of laboratory aging on chemistry and rheology of crumb rubber modified bitumen

et al. 2020

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Aging during construction and in-service substantially changes the chemical composition and physical properties of bitumen thereof influences the performance of asphalt pavements. The modification of bitumen by crumb rubber modifier (CRM) significantly increases the complexity of the aging mechanism and is expected to improve the aging resistance of bitumen. This study aims to investigate the effects of laboratory short-term and long-term aging on the chemistry and rheology of crumb rubber modified bitumen (CRMB). Neat bitumen and CRMB with four different CRM contents were studied. Fourier transform infrared spectroscopy and dynamic shear rheometer were employed to measure the change in the chemical composition and rheological properties of binders at different aging states. Bitumen hardening, which was rheologically revealed by the frequency sweep and multiple creep recovery test results, was also reflected in the growth of carbonyl and sulfoxide functional groups. In addition, the aliphaticity and aromaticity indices of binders before and after aging were also investigated. CRMB binders showed improved aging resistance compared to neat bitumen as reflected by the decreased carbonyl and sulfoxide indices as well as the lower change in rheological parameters. Higher resistance against aging was achieved when increasing the CRM content. The results also highlight the correlation between chemistry and rheology of bitumen. Among six selected mechanical parameters of binder, the nonrecoverable creep compliance and percent recovery show better correlations with the combined chemical aging index (sum of carbonyl and sulfoxide indices) than the parameters derived from the linear viscoelastic region.

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Section: Chemo-mechanics Of Agingmentioning

confidence: 99%

Effect of laboratory aging on chemistry and rheology of crumb rubber modified bitumen

et al. 2020

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“…When looking at ageing, mainly the CO and SO vibrations of the binder are of importance. Typically, an increase is expected when asphalt binder is prone to oxidation Poulikakos et al, 2019). The variation of the chemical composition as an effect of oxidation can be followed along the various oxidation states throughout the ageing process.…”

Section: Introductionmentioning

confidence: 99%

Rheological, spectroscopic and microscopic assessment of asphalt binder ageing

Koyun

Büchner

Wistuba

et al. 2020

Road Materials and Pavement Design

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Asphalt binder ageing leads to significant changes in mechanical and physicochemical properties and often to premature cracking in asphalt pavements. A polymer-modified asphalt binder is repeatedly aged through laboratory techniques, i.e. rolling thin film oven test and pressure ageing vessel. The resulting properties of the aged binder are analysed using dynamic shear rheometer, Fourier transform infrared spectroscopy, atomic force microscopy and cryo-environmental scanning electron microscopy. Rheological, spectroscopic and macroscopic properties change progressively with the level of laboratory ageing. Surprisingly, this change shows approximately a linear trend. The first ageing step has the highest impact on the property change, whereas all the following ageing steps result in similar but reduced impact. Moreover, there is a strong interdependency between different mechanical and physicochemical properties. Hence, novel insights into the mechanics of asphalt binder ageing and into the search for ageing laws for asphalt binders.

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“…Infrared spectroscopy is also a common method to measure the carbonyl absorption peak of bitumen before and after ageing to characterize the ageing degree [14][15][16][17][18][19]. In addition, a dynamic shear rheological test (DSR) [20][21][22][23] and gel permeation chromatography (GPC) [24,25] can also be used to study the ageing behaviour and ageing mechanism of bitumen. However, these methods can not reveal the relationship between bitumen micro-properties and ageing properties.…”

Section: Introductionmentioning

confidence: 99%

Study on the Relationship between Nano-Morphology Parameters and Properties of Bitumen during the Ageing Process

et al. 2020

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Thermo-oxidative ageing is one of the main factors affecting bitumen performance. At present, the research on bitumen ageing has entered the micro stage. The purpose of this paper was to study the relationship between nano-morphology parameters and properties of bitumen of bitumen during the ageing process. To this end, bitumen with different ageing degrees was prepared in this paper, and Atomic force microscopy samples with different cooling rates were prepared. The relationship between ageing degree of bitumen and nano-morphology parameters was analyzed. A functional relationship model between nano-morphology parameters and properties of bitumen was established. The results show that the percentage of bee-like structure area ( P bee − like ), maximum amplitude ( H max ) and roughness ( R q ) increased with the increase of ageing degree. the percentage of bee-like structure area, the maximum amplitude and the roughness increase with the increase of cooling rate. With the increase of the percentage of bee-like structure area, the maximum amplitude and the roughness, the viscosity of bitumen at 60 °C increases, penetration decreases, and softening point increases. There is a nonlinear relationship between the nano-morphology parameters and properties of bitumen.

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Impact of asphalt aging temperature on chemo-mechanics

Cited by 61 publications

References 25 publications

Effect of laboratory aging on chemistry and rheology of crumb rubber modified bitumen

Effect of laboratory aging on chemistry and rheology of crumb rubber modified bitumen

Rheological, spectroscopic and microscopic assessment of asphalt binder ageing

Study on the Relationship between Nano-Morphology Parameters and Properties of Bitumen during the Ageing Process

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