Correlation Analysis of Chemical Components and Rheological Properties of Asphalt After Aging and Rejuvenation

Fan, Guopeng; Zhang, Naitian; Lv, Songtao; Cabrera, Milkos Borges; Yuan, Jiang; Fan, Xianpeng; Liu, Honglin

doi:10.1061/(asce)mt.1943-5533.0004467

Cited by 9 publications

(3 citation statements)

References 43 publications

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“…Rheological properties are important factors that directly reflect the performance of asphalt materials 35 . Meanwhile, there is a significant difference in the rheological properties of asphalt binder before and after aging 36 . Therefore, the difference in rheological properties is considered one of the reasonable indicators for evaluating the aging behaviors of asphalt, called the Rheological Aging Index (RAI).…”

Section: Methodsmentioning

confidence: 99%

“…35 Meanwhile, there is a significant difference in the rheological properties of asphalt binder before and after aging. 36 Therefore, the difference in rheological properties is considered one of the reasonable indicators for evaluating the aging behaviors of asphalt, called the Rheological Aging Index (RAI). The differences in rheological properties of asphalt after aging are reflected in many aspects.…”

Section: Rheological Characteristics Of Wide Temperature Rangementioning

confidence: 99%

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Rheological properties and aging resistance of self‐healing polyurea elastomer modified asphalt

Li,

Zhang,

et al. 2024

Polymer Engineering & Sci

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Polymer modified asphalt containing dynamic chemical bonds has the potential to increase the service life of asphalt pavement due to its excellent self‐healing ability. The effect of this self‐healing accelerator with dynamic chemical bond on the rheological properties and aging resistance of asphalt binder is still unclear. In this study, a self‐healing polyurea elastomer (PUA) modified asphalt containing dynamic disulfide bonds was prepared. The high‐ and low‐temperature performance and fatigue resistance of PUA modified asphalt were studied through multiple stress creep, low‐temperature bending beam rheometer, mechanical glass transition temperature, and linear amplitude scanning tests. Moreover, considering the service environment of asphalt over a wide temperature range (−30–70°C), three rheological aging indices (RAI) were proposed. At the same time, the aging resistance of PUA modified asphalt was evaluated by chemical aging index (CAI) based on carbonyl and sulfoxide groups. Finally, a linear relationship is established between RAI and CAI over a wide temperature range. The experimental results show that self‐healing accelerators can increase the resistance to permanent deformation of asphalt by 47.41% and the fatigue resistance by 88.54%. The S value of PUA modified asphalt decreased by at most 33.21% and the m value increased by at most 35.23% compared with BA at −18°C. Moreover, PUA can improve the long‐term thermal oxygen aging resistance of asphalt binders by at least 38.33% over a wide temperature range.Highlights Rheological properties of self‐healing polyurea elastomer modified asphalt. Aging resistance of self‐healing polyurea elastomer modified asphalt. Proposed rheological aging indices for different temperature ranges. Clarified the correlation between chemical–rheological aging indices.

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Section: Methodsmentioning

confidence: 99%

Section: Rheological Characteristics Of Wide Temperature Rangementioning

confidence: 99%

Rheological properties and aging resistance of self‐healing polyurea elastomer modified asphalt

Li,

Zhang,

et al. 2024

Polymer Engineering & Sci

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“…The TGA test can accurately reflect the destruction of asphalt in the high-temperature state; the TGA curve of asphalt and its differential DTG curve can be obtained from the asphalt onset of its decomposition temperature, as well as the temperature of the maximum loss of weight and the percentage of weight loss, and thus the thermal stability of the asphalt can be evaluated. The TGA and DTG curves of each asphalt are given in Figure 14, and it can be seen that there are essentially three stages of zero pyrolysis: strong pyrolysis and slow pyrolysis in the pyrolysis process of asphalt [36]. The zero-pyrolysis stage is from room temperature to 250 • C, where the rate of the temperature rise is modest, the TGA curve and the DTG curve are about horizontal, the asphalt quality change is small, and the rate of the weight loss is almost zero.…”

Section: Tgamentioning

confidence: 99%

Performance Characterisation and Microscopic Characteristics of Rapeseed Heavy Oil–Diatomaceous Earth Composite-Modified Asphalt

Chen,

Yi,

Yuan

et al. 2023

Coatings

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In order to further improve the performance of bio-asphalt, because of its poor high-temperature performance, another biomass material, diatomaceous earth, was employed as a composite modifier, and a composite-modified asphalt was made to increase the high-temperature performance of bio-asphalt. The optimal preparation parameters of a rapeseed heavy oil–diatomaceous earth composite-modified asphalt were identified by employing an orthogonal test design. Based on the laboratory test, the physical properties, rheological properties, and microscopic properties of the asphalt were evaluated correspondingly by utilising matrix asphalt, rapeseed heavy oil-modified asphalt, and diatomaceous earth-modified asphalt as the control group. The results of the orthogonal test analysis showed that the optimum preparation parameters of the rapeseed heavy oil–diatomaceous earth composite-modified asphalt were 8% rapeseed heavy oil, 5% diatomaceous earth, a shear period of 35 min, and a shear rate of 2500 r/min. The addition of rapeseed heavy oil improved the fatigue resistance and low-temperature performance of the asphalt, but, at the same time, the asphalt penetration increased, the softening point and viscosity decreased, and the high-temperature rutting resistance decreased. Compared with the matrix asphalt, the viscosity of the rapeseed heavy oil–diatomaceous earth composite-modified asphalt at 135 °C rose by 23.2%. The rutting factor G*/sinδ increased by 45.5%, 15.6%, 17.6%, 29.8%, and 22.0%, while the fatigue factor G*·sinδ increased by 41.9%, 14.2%, 16.7%, 19.4%, and 23.1%, respectively, in the high-temperature rheological properties test temperature interval from 52 °C to 76 °C. The creep stiffness S fell by 16.2%, 36.1%, and 25.2%, while the creep rate m rose by 25.8%, 52.9%, and 13.4%, respectively, in the low-temperature rheological performance test temperature interval from −24 °C to −12 °C. Therefore, diatomaceous earth may effectively counteract the softening effect of the rapeseed heavy oil on the matrix asphalt and may raise the strength level and permanent deformation resistance of the composite-modified asphalt with only partial loss of fatigue resistance. The matrix asphalt, rapeseed oil, and diatomaceous earth exhibited high compatibility. The integration of rapeseed oil and diatomaceous earth largely did not modify the chemical properties of asphalt, and it was able to maintain the qualities of asphalt itself. Rapeseed heavy oil and diatomaceous earth on the thermal stability of the matrix asphalt has the opposite effect. The reorganisation component of diatomaceous earth on the colloidal structure of asphalt is conducive to the stabilisation of the nature of the asphalt, which can significantly improve the temperature stability of asphalt.

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Analysis of rheological behavior and anti-aging properties of SBS modified asphalt incorporating UV absorbent and naphthenic oil (NPO)

Zhu

et al. 2023

Construction and Building Materials

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Correlation Analysis of Chemical Components and Rheological Properties of Asphalt After Aging and Rejuvenation

Cited by 9 publications

References 43 publications

Rheological properties and aging resistance of self‐healing polyurea elastomer modified asphalt

Rheological properties and aging resistance of self‐healing polyurea elastomer modified asphalt

Performance Characterisation and Microscopic Characteristics of Rapeseed Heavy Oil–Diatomaceous Earth Composite-Modified Asphalt

Analysis of rheological behavior and anti-aging properties of SBS modified asphalt incorporating UV absorbent and naphthenic oil (NPO)

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