Effects of crystalline wax and asphaltene on thermoreversible aging of asphalt binder

Ding, Haibo; Liu, Han; Qiu, Yanjun; Rahman, Ali

doi:10.1080/10298436.2021.1931199

Cited by 38 publications

(8 citation statements)

References 26 publications

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“…However, the crystallinity of additives will lead to the degradation of the cracking resistance performance of the asphalt binder. 7 There is no doubt that the cracking resistance performance is one of the significant properties of the asphalt binder. 8 Thermoreversible (physical) aging is a major factor affecting cracking resistance.…”

Section: ■ Introductionmentioning

confidence: 99%

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Determining the Sustainable Component of Wax-Based Warm Mix Additives for Improving the Cracking Resistance of Asphalt Binders

Zhang

Ding

et al. 2021

ACS Sustainable Chem. Eng.

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The cracking resistance performance of an asphalt binder is a significant factor affecting the durability of asphalt pavements, and wax-based warm mix additives are devoted to improving the crack resistance of asphalt pavements. However, different components of wax-based warm mix additives (Fischer–Tropsch (F–T)-, fatty acid amide (FAA)-, polyethylene (PE)-, and linear aliphatic hydrocarbon (LAH)-based waxes) have different effects on the cracking resistance performance of the asphalt binder. Therefore, the optimum component of additives was determined by the combination of a microscopic method and a macroscopic test. The average carbon numbers of four additives were determined by a high-temperature gas chromatography (HTGC) test. The multiple stress creep recovery (MSCR), double-edge-notched tension (DENT), and extended bending beam rheological (ExBBR) tests were used to characterize the macroscopic performance of a modified asphalt binder. The F–T wax with long-chain molecules improved the high-temperature performance and lowered the degree of acceleration of thermoreversible aging. The FAA, PE, and LAH waxes with short-chain molecules enhanced the ductile fracture resistance performance. Therefore, the average carbon number as the optimum component of wax-based additives was recommended as C40 to C60.

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Section: ■ Introductionmentioning

confidence: 99%

“…The effect of reducing the viscosity of the asphalt binder can be achieved, and the operating temperature will be decreased. However, the crystallinity of additives will lead to the degradation of the cracking resistance performance of the asphalt binder …”

Section: Introductionmentioning

confidence: 99%

Determining the Sustainable Component of Wax-Based Warm Mix Additives for Improving the Cracking Resistance of Asphalt Binders

Zhang

Ding

et al. 2021

ACS Sustainable Chem. Eng.

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“…Paraffinic and naphthenic that contain high saturate may create compatibility issues with asphalt binders. Ding et al [ 38 ] concluded that C 20 H 42 can significantly increase thermoreversible aging in the base binder; however, C 32 H 66 and asphaltene additives did not produce a similar effect. Shariati et al [ 39 ] proposed a hybrid bio-oil rejuvenator, which can revitalize the aged binder by simultaneously desorbing and peptizing aged binder molecules.…”

Section: Introductionmentioning

confidence: 99%

Correlation Analysis between Mechanical Properties and Fractions Composition of Oil-Rejuvenated Asphalt

et al. 2022

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To clarify the intrinsic relationship between the mechanical properties of asphalt and its fraction composition, the SARA fraction composition and six macroscopic mechanical properties (critical cracking temperature (TCR), fatigue life (Nf), non-recoverable creep (Jnr3.2), penetration, ductility, and softening point) were investigated for 16 asphalt samples. Fraction contents of asphaltene and aromatic are strongly correlated with TCR and ductility (R2 > 0.92) that characterize the ability of asphalt to adapt to deformation at low and medium temperatures. Heavy fraction (asphaltene and resins) content is also strongly correlated with (R2 > 0.90) penetration and Jnr3.2 that characterize the resistance of the asphalt to overall deformation at medium and high temperatures. To express the changes in the four fractions simultaneously with one indicator, a statistic, average deviation of the fractions between the given asphalt and its original (marked σ), is introduced in this study to characterize the degree of asphalt aging based on the fraction changes. It normalizes the four simultaneous change indicators (percentage of SARA fractions) during asphalt aging into one indicator. This new indicator has a strong correlation with several mechanical performance indicators of asphalt, where it is strongly correlated with TCR (R2 > 0.90), ductility, and penetration, which are also well correlated with Jnr3.2 (R2 > 0.85), Nf (R2 > 0.75), and softening point (R2 > 0.75).

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“…Because of its high-hydrocarbon content, the use of waste PP plastic for the production of high-value-added products and energy recovery has attracted extensive attention among researchers, as it can be easily transformed to alkenes and alkanes via pyrolysis [17]. Because the wax can be used as WMa or can be used for improving the thermal stability of asphalt binder [20,21], the production of PP wax (PPW) should be an excellent strategy for the resource utilization of waste PP plastic. Current research has focused on the production of fuel from waste plastics via thermal pyrolysis and catalytic cracking [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Wax-Based Warm Mixture Additives from Waste Polypropylene (PP) Plastic and Their Effects on the Properties of Modified Asphalt

Zhou

Li²,

Wang³

et al. 2022

Materials

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The production of high-performance, low-cost warm mix additives (WMa) for matrix asphalt remains a challenge. The pyrolysis method was employed to prepare wax-based WMa using waste polypropylene plastic (WPP) as the raw material in this study. Penetration, softening point, ductility, rotational viscosity, and dynamic shear rheological tests were performed to determine the physical and rheological properties of the modified asphalt. The adhesion properties were characterized using the surface free energy (SFE) method. We proved that the pyrolysis temperature and pressure play a synergistic role in the production of wax-based WMa from WPPs. The product prepared at 380 °C and 1.0 MPa (380-1.0) can improve the penetration of matrix asphalt by 61% and reduce the viscosity (135 °C) of matrix asphalt by 48.6%. Furthermore, the modified asphalt shows favorable elasticity, rutting resistance, and adhesion properties; thus, it serves as a promising WMa for asphalt binders.

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Effects of crystalline wax and asphaltene on thermoreversible aging of asphalt binder

Cited by 38 publications

References 26 publications

Determining the Sustainable Component of Wax-Based Warm Mix Additives for Improving the Cracking Resistance of Asphalt Binders

Determining the Sustainable Component of Wax-Based Warm Mix Additives for Improving the Cracking Resistance of Asphalt Binders

Correlation Analysis between Mechanical Properties and Fractions Composition of Oil-Rejuvenated Asphalt

Preparation of Wax-Based Warm Mixture Additives from Waste Polypropylene (PP) Plastic and Their Effects on the Properties of Modified Asphalt

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