Evaluation of the state of practice asphalt binder and mixture tests for assessing the compatibility of complex asphalt materials

Zhang, Runhua; Dave, Eshan V.; Sias, Jo E.; Sylvester, Tony; Wang, Zheng

doi:10.1080/14680629.2023.2181005

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…Li et al [15] investigated the low-temperature rutting and cracking properties of SBSmodified asphalt mixtures containing RAP. The findings suggested that appropriate recycling agents enhanced the low-temperature properties of RAP without significantly adversely affecting the compaction of asphalt mixtures with RAP [16]. The use of RA in the RAP restoration process is becoming more and more frequent.…”

Section: Introductionmentioning

confidence: 97%

Evaluating the Effects of RA on the Rheological Properties and Aging Susceptibility of RAM Asphalt

Yang,

Liu,

Wang

et al. 2023

Buildings

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Recycling agents (RAs) can mitigate the adverse effects of reclaimed asphalt pavement (RAP) on recycled asphalt, which can result in more RAP being added. To explore the effects of four RAs on recycled asphalt, this study used asphalt rheological performance experiments, including the bending beam rheometer (BBR) test, the dynamic shear rheological (DSR) test, and the indirect tensile asphalt cracking test (IDEAL-CT), to study the performance grade (PG), cracking resistance, and cracking susceptibility of recycled asphalt. In addition, an aging model for asphalt was used, and short-term and long-term aging sensitivities were evaluated according to this model. Results showed that US Soybean significantly enhanced the high-temperature and low-temperature performance grade (PGLT) and cracking resistance and reduced cracking sensitivity of the recycled asphalt. In addition, the short-term aging sensitivity was the lowest. It showed the best regeneration effect. However, the recycled asphalt with US Soybean showed the highest long-term aging sensitivity, suggesting that longer aging time results in poorer performance. Ingevity’s PG, cracking resistance, and cracking sensitivity are slightly lower than that of US Soybean, and Ingevity demonstrated the second lowest short-term aging sensitivity. However, its prolonged aging sensitivity was much lower than that of US Soybean. Asphalt and Wax Innovations and Georgia Pacific agents slightly improved recycled asphalt properties. The long-term aging sensitivity of recycled asphalt with four Ras was higher than that of recycled asphalt without Ras. These results indicated that the recycled asphalt’s performance with Ras worsened as aging time increased compared to the original recycled asphalt.

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Section: Introductionmentioning

confidence: 97%

Evaluating the Effects of RA on the Rheological Properties and Aging Susceptibility of RAM Asphalt

Yang,

Liu,

Wang

et al. 2023

Buildings

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Evaluating and correlating asphalt binder and mixture fatigue properties considering aging conditions

Zhang,

Cheng,

et al. 2024

Construction and Building Materials

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Evaluation of Alternative Approaches to Restore the Rheology of Recycled Asphalt Binders

Fried,

Boz,

Preciado

et al. 2024

Transportation Research Record: Journal of the Transportation R

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This study evaluates the ability of softer virgin binders, recycling agents (RAs), and extenders to restore the rheology of reclaimed asphalt pavement (RAP) binders to that of control binders. Control binders are those binders that would be specified for use with virgin mixtures. Two procedures for RA dosage selection are examined: 1) dose to restore the intended high-temperature grade; and 2) dose to restore the intended low-temperature grade. A broad range of point parameters and rheological parameters that measure the balance of relaxation and stiffness characteristics are examined at two long-term age levels. The results of recycled binder blends are compared with the control virgin binders statistically. Using softer virgin binders generally resulted in blended binder performance-graded properties that were similar to or better than the control. However, these softer binder systems often exhibited other rheological properties that were inferior to the control. The rheological characteristics of the RA blends varied with the RA type and dosage. Blends with dosages that restored the intended high-temperature grade generally yielded the most favorable comparisons to the control binders. RAs derived from triglycerides and fatty acids and from tall oils generally yield more favorable rheological characteristics than those derived from aromatic extracts. In addition, a vacuum gas oil extender achieved similar blend rheological characteristics to RAs but extenders containing re-refined engine oil bottoms generally yielded a poor balance of stiffness and relaxation characteristics. Rheological balance parameters are generally weakly correlated, suggesting they provide unique insight into the rheological behavior of binders.

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Evaluation of the state of practice asphalt binder and mixture tests for assessing the compatibility of complex asphalt materials

Cited by 4 publications

References 18 publications

Evaluating the Effects of RA on the Rheological Properties and Aging Susceptibility of RAM Asphalt

Evaluating the Effects of RA on the Rheological Properties and Aging Susceptibility of RAM Asphalt

Evaluating and correlating asphalt binder and mixture fatigue properties considering aging conditions

Evaluation of Alternative Approaches to Restore the Rheology of Recycled Asphalt Binders

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