Correlating the asphalt-binder high-temperature properties (DSR) to HMA permanent deformation (RLPD) and field rutting: A laboratory-field study

Walubita, Lubinda F.; Mahmoud, Enad; Fuentes, Luis; Prakoso, Adrianus; Lee, Sang I.; Souliman, Mena I.; Komba, Julius J

doi:10.1016/j.conbuildmat.2020.120761

Cited by 33 publications

(13 citation statements)

References 27 publications

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“…According to related researches and comprehensive consideration of the AASHTO asphalt evaluation system, 64°C was adopted as the frequency sweep test temperature in this paper [19][20][21]. In this paper, the frequency sweep tests were carried out with a diameter of 25 mm and a gap of 1 mm at 64°C, and the frequency domain was 0.1-100 rad/s.…”

Section: Test Methodsmentioning

confidence: 99%

Analysis of the Influence of SBS Content and Structure on the Performance of SBS/CR Composite Modified Asphalt

Gong

Pang

Fayang

et al. 2021

Advances in Materials Science and Engineering

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The performance of asphalt can be improved by adding styrene-butadiene-styrene (SBS) copolymer and crumb rubber (CR). This paper investigated the influence of the structure and content of styrene-butadiene-styrene (SBS) copolymer on the properties of SBS/CR modified asphalt (SBS/CRMA). These SBS/CRMA were prepared by mixing 90# matrix asphalt, 60 mesh CR powder, and SBS copolymers with two molecular structures, which were tested for penetration, softening point, ductility, and rheology. The complex modulus, phase angle, rutting factor, storage modulus, and dissipation modulus of SBS/CRMA were analyzed with the 64°C frequency sweep tests. The results revealed that the content and structure had significant impacts on the performances of SBS/CRMA, and the advantages of SBS polymer network structure in the modified asphalt system cannot be reflected when the amount of SBS was small. Meanwhile, the high-temperature stability, low-temperature tensile resistance, temperature sensitivity, and viscoelasticity of rubberized asphalt were further improved by adding a moderate amount of SBS copolymer. Furthermore, the properties of SBS/CRMA were better as the contents of SBS increased when the type of SBS doped was the same. The effect of modification improved by star-shaped SBS copolymer addition was more than that improved by linear SBS copolymer addition. As a conclusion, the content of 4 wt% star-shaped SBS and 20 wt% CR powder-modified 90# matrix asphalt has the best modification effect with the comparison of other groups.

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Section: Test Methodsmentioning

confidence: 99%

Analysis of the Influence of SBS Content and Structure on the Performance of SBS/CR Composite Modified Asphalt

Gong

Pang

Fayang

et al. 2021

Advances in Materials Science and Engineering

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“…The spacing between the parallel plates was 2 mm. In the study, the DSR test was conducted at a temperature of 20°C in a controlled stress‐loading mode at 0.4 MPa 30,31 . Like the RTFOT and PAV aging tests, four SRAA sample replicates were prepared and tested in the DSR test device per rejuvenation dosage.…”

Section: Methodsmentioning

confidence: 99%

“…Asphalt-binder is comprised of four key components, namely saturates (S), asphaltenes (A), resins (R), and aromatics (A), which is often denoted as SARA. 31,[38][39][40] The chemical models for SARA are shown in Figure 1.…”

Section: Molecular Dynamic Simulationsmentioning

confidence: 99%

Study of the self‐healing properties of aged asphalt‐binder regenerated using residual soybean‐oil

Zhang

Zhou

Zhang

et al. 2021

J of Applied Polymer Sci

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To improve the self-healing properties and reduce the reaction energy barrier during the self-healing process of aged asphalt-binders, this study utilized residual oil extracted from soybean to regenerate the aged asphalt-binder and enhance its rheological properties including the self-recovery potential. The self-healing properties from the reaction energy barrier and chemical structure were characterized using molecular dynamic simulations. In addition, the rheological properties were measured and quantified using the dynamic shear rheometer test device. From the study results, the least reaction energy (30.16 kcalÁmol À1 ) barrier registered during the self-healing process of the regenerated asphalt-binder occurred at 5.8 wt% residual Soybean-oil, and was thus, deemed as the optimum oil content. The results further indicated that the residual soybean-oil had a significant influence on the spatial configuration of the molecules in the aged asphalt-binder, particularly on the saturates and aromatics components. Overall, the study findings indicated that residual Soybean-oil can potentially reduce the reaction energy barrier of aged asphaltbinders and enhance the self-healing properties including fatigue life.

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“…As a viscoelastic material, the viscoelastic properties of the asphalt binder and the BRAA under different temperature conditions were quantified using the complex shear modulus ( G *) and phase angle (δ), respectively [ 52 ]. In line with the Superpave asphalt binder’s specification [ 53 ], the G */Sin ( δ ) parameters for the original (unaged virgin) asphalt binder and the short-term-aged asphalt binder were limited to 1.0 kPa and 2.2 kPa, respectively [ 54 ].…”

Section: Laboratory Testing and Simulationsmentioning

confidence: 99%

Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations

Zhang

Chao²,

Zhou

et al. 2021

Molecules

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Soybean-derived bio-oil is one of the vegetable-based oils that is gaining the most interest for potential use in the rejuvenation of aged asphalt binders. This laboratory study was conducted to characterize and quantify the diffusion and rheological properties of bio-oil-rejuvenated aged asphalt binder (BRAA) using soybean oil. In the study, the chemical structure of the soybean oil was comparatively characterized using an element analyzer (EA), gel permeation chromatography (GPC), and a Fourier infrared (FTIR) spectrometer, respectively. Based on the chemical structure of the bio-oil, BRAA molecular models were built for computing the diffusion parameters using molecular dynamic simulations. Likewise, a dynamic shear rheometer (DSR) test device was used for measuring and quantifying the rheological properties of the aged asphalt binder rejuvenated with 0%, 1%, 2%, 3%, 4%, and 5% soybean oil, respectively. The laboratory test results indicate that bio-oil could potentially improve the diffusion coefficients and phase angle of the aged asphalt binder. Similarly, the corresponding decrease in the complex shear modulus has a positive effect on the low-temperature properties of BRAA. For a bio-oil dosage 4.0%, the diffusion coefficients of the BRAA components are 1.52 × 10−8, 1.33 × 10−8, 3.47 × 10−8, 4.82 × 10−8 and 3.92 × 10−8, respectively. Similarly, the corresponding reduction in the complex shear modulus from 1.27 × 107 Pa to 4.0 × 105 Pa suggests an improvement in the low-temperature properties of BRAA. Overall, the study contributes to the literature on the potential use of soybean-derived bio-oil as a rejuvenator of aged asphalt binders.

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Correlating the asphalt-binder high-temperature properties (DSR) to HMA permanent deformation (RLPD) and field rutting: A laboratory-field study

Cited by 33 publications

References 27 publications

Analysis of the Influence of SBS Content and Structure on the Performance of SBS/CR Composite Modified Asphalt

Analysis of the Influence of SBS Content and Structure on the Performance of SBS/CR Composite Modified Asphalt

Study of the self‐healing properties of aged asphalt‐binder regenerated using residual soybean‐oil

Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations

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