Permanent Deformation Characteristics of Warm Asphalt Binders under Reduced Aging Conditions

Julaganti, Ashok; Choudhary, Rajan; Kumar, Abhinay

doi:10.1007/s12205-017-1903-0

Cited by 9 publications

(3 citation statements)

References 28 publications

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“…This phenomenon indicates that aging leads to the "hardening" of the asphalt pavement, with a deeper degree of aging resulting in a more pronounced "hardening" effect. This is consistent with the results of JULAGANTI et al [30].…”

Section: Creep Recovery Curvesupporting

confidence: 94%

Rheological properties and engineering application of low-grade asphalt mixture

Song,

Tu,

Xie

et al. 2023

Matéria (Rio J.)

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This study investigates the feasibility of low-grade hard asphalt in high-temperature regions. We conducted an analysis of the high-temperature rheological properties of asphalt before and after short-term and long-term aging using the dynamic shear rheological (DSR) test and multi-stress creep recovery (MSCR) test. Additionally, the road performance of the asphalt mixture was studied by rutting test and low temperature beam bending test. The results indicate that the 30# asphalt demonstrates superior anti-rutting performance compared to the 50# asphalt. Furthermore, the rutting factor and fatigue factor of the 30# asphalt during aging are significantly higher than those of the 50# asphalt. With increasing temperature, stress level, and stress action time, the strain of the asphalt gradually increases. The unrecoverable creep compliance of the 50# asphalt exceeds that of the 30#. Although the high-temperature performance of the 30# asphalt mixture outperforms that of the 50# asphalt mixture, it exhibits lower flexural tensile strength and deformation ability at low temperatures compared to the 50# asphalt mixture. Overall, low-grade asphalt demonstrates relatively stable stress variations and exhibits good high-temperature stability.

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Section: Creep Recovery Curvesupporting

confidence: 94%

Rheological properties and engineering application of low-grade asphalt mixture

Song,

Tu,

Xie

et al. 2023

Matéria (Rio J.)

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“…The reduction of Jnr and improvement of %Recovery of binders with the addition of Sasobit indicates a lower potential of the asphalt binder to rutting. Similar impacts of Sasobit® supplement on lower non-recoverable compliances of binders can also be found from other researches: Morea, Marcozzi [21], Ziari and Babagoli [22], Ali, Kim [23], and Julaganti, Choudhary [24]. Additionally, in general, the binders with the addition of Rediset result in comparable Jnr and %Recovery of the control binder.…”

Section: Multiple Stress Creep Recovery (Mscr) Testsupporting

confidence: 82%

Warm mix asphalt (WMA) for rapid construction in airfield pavement

Rahman

Dawson

Thom

2020

Construction and Building Materials

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Warm-mix asphalt (WMA) is commonly mixed and compacted 15°C to 30°C below that of conventional hot mix asphalt (HMA). The lower production temperature of WMA is expected to give an advantage of a lower cooling time of newly laid asphalt overlay before it can be opened to traffic during the nighttime airfield pavement construction. The reduced cooling time of WMA would allow shorter airport closure time window and/or extend the time for the contractor for paving, and thus shorten the overall construction period due to more volume done each night. This is a beneficial practical advantage to hectic airports where the typical off-peak period is as short as 6-8 hours. In this research, two different WMA technologies, Sasobit® and Rediset® (organic and chemical) were investigated through laboratory tests to see if there were notable differences in WMA rutting performance that could have considerable practical effects on the permissible temperature at the opening to traffic as compared to the HMA. Furthermore, a validated finite element (FE) solution for one-dimensional transient heat-transfer model is used to simulate the effect of the use of warm mix on shortening the cooling time and the overall project time. The laboratory test shows that the WMA with Sasobit has a significantly better rutting performance at the elevated temperature, enabling the WMA to be opened to traffic at a higher temperature, compared to HMA. The cooling analysis showed that, in comparison to HMA, the use of WMA could shorten the closure time of airport during the night time construction by 8-67 minutes, depending on the asphalt overlay thickness, traffic opening temperature and WMA production temperature. The use of WMA could also minimize the overall construction period by 2-16 nights for a single lift overlay, for the cases studied.

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“…The asphalt binder is a typical viscoelastic material [ 1 ] whose mechanical behavior and deformation characteristics have temperature and time dependence [ 2 ]. The deformation of asphalt binder caused by load can only partially recover, and the unrecoverable part will accumulate under repeated load, resulting in high-temperature deformation disease of asphalt pavement [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Creep–Recovery Behavior of Polyphosphoric Acid (PPA) Modified Asphalt Binders under Multiple Factors

Jiang¹,

Jiang

et al. 2023

Materials

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The polyphosphoric acid (PPA) modified asphalt binder is a potential choice as one of the pavement materials for its excellent high-temperature performance and low cost. To further analyze the influences of temperature and load on the service life of pavement from the perspective of deformation behavior, six kinds of asphalt binders with different PPA dosages were prepared for Multiple Stress Creep and Recovery (MSCR) tests at five temperature levels. The deformation behavior is investigated by basic deformation parameters, rheological simulation, and energy parameter changes. The results show that the percent recovery (R) drops sharply while non-recoverable creep compliance (Jnr) goes up slightly with the increase in temperature. Three-element model, composed by E1, η1, and η2, can be used to describe the creep behavior. PPA-modified asphalt binder exhibits nonlinear creep behavior, and the logarithmic model can simulate recovery behavior better than the power–law model. Stored energy and dissipated energy can characterize the change of energy in the creep process under different conditions and show a significant correlation to deformation parameters. It is concluded that the elastic component of asphalt binders is increased by PPA, which is beneficial to the improvement of the deformation resistance and recovery capacity of asphalt binders. The recommended dosage of PPA is 1.5%. This investigation is conducive to a better understanding of the deformation behavior of PPA-modified asphalt binders and provides a reference for its engineering applications.

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Permanent Deformation Characteristics of Warm Asphalt Binders under Reduced Aging Conditions

Cited by 9 publications

References 28 publications

Rheological properties and engineering application of low-grade asphalt mixture

Rheological properties and engineering application of low-grade asphalt mixture

Warm mix asphalt (WMA) for rapid construction in airfield pavement

Experimental Study on Creep–Recovery Behavior of Polyphosphoric Acid (PPA) Modified Asphalt Binders under Multiple Factors

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