Rheological evaluation of asphalt blends at multiple rejuvenation and aging cycles

“…This suggests that the rejuvenator may limit the change in relaxation properties caused by ageing for high RA percentages. expected, respectively (Christensen et al, 2019;Koudelka et al, 2019;Ogbo et al, 2019). Results in Figure 8 show that ageing caused a shift to the left top corner, towards the onset of cracking boundary.…”

Section: Mscrmentioning

confidence: 64%

“…The effect of rejuvenators of different origins, such as waste and refined petroleum products or bio-based sources, on the mechanical performance of bituminous binders has been investigated in several studies (Koudelka et al, 2019;Zaumanis et al, 2013;Zaumanis et al, 2014). Results prove that rejuvenators can restore RA binder properties to some extent.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies have highlighted the importance of rejuvenated binder performance after ageing. The effectiveness of rejuvenators might reduce with ageing, although the susceptibility to this phenomenon depends on the type of rejuvenator (Koudelka et al, 2019;Mohammadafzali et al, 2017). Based on mechanical performance, some studies report increased ageing rates (Cai et al, 2019), while others found reduced ageing rates compared to reference binders (Elkashef et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Influence of soft binder and rejuvenator on the mechanical and chemical properties of bituminous binders

Jacobs

Margaritis

Hernando

et al. 2021

Journal of Cleaner Production

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“…Balanced rejuvenating design based on multicriteria evaluation has been used by many researchers to optimize the rutting, cracking, and fatigue performances of asphalt binders [18,19]. Koudelka et al [20] used two rheological parameters: the Glower-Rowe (G-R) parameter obtained from the dynamic shear rheometer (DSR) tests and the delta T c (ΔT c ) obtained from the bending beam rheometer (BBR) tests to determine the optimum dosages of recycling agents. Elkashef et al [21] found that the extent of rejuvenation/ regeneration of the soybean-derived rejuvenator was more pronounced for the stiffer binders.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Physical and Rheological Properties of Rejuvenated Styrene‐Butadiene‐Styrene‐Modified Asphalt Binders

Chen

Wang

Zhang

et al. 2020

Advances in Materials Science and Engineering

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To evaluate the physical and rheological properties of rejuvenated styrene-butadiene-styrene-modified asphalt (SBSMA) binders designed for rapid in-place pavement recycling, an aged SBSMA binder was rejuvenated with three rejuvenators (i.e., Types I, II, and III) in different dosages. The physical properties of rejuvenated SBSMA were obtained to determine the optimal type and dosage of rejuvenators for the first and second rejuvenation. Performance grade (PG) tests, multiple stress creep recovery (MSCR) tests, and linear amplitude sweep (LAS) tests were conducted to measure the rheological properties using the dynamic shear rheometer (DSR) and bending beam rheometer (BBR). The results exhibited that the rejuvenators could soften the multiple aged binder and enhance its high- and low-temperature performance. The rejuvenation effect of rejuvenator Type I with the optimal dosage of 6∼8% was the most appropriate for the first rejuvenation. The optimal dosage of the second rejuvenation was 10∼12%. The addition of rejuvenators decreased the rutting factor G∗/sin δ, creep stiffness (S), delta Tc (ΔTc) parameter, recovery response (R), and yield stress of rejuvenated SBSMA. On the other hand, an increase in the rate of relaxation (m-value), nonrecoverable creep compliance (Jnr), and yield strain of rejuvenated SBSMA was recorded. Overall, the study findings indicated an improvement in the elastic properties of rejuvenated SBSMA, which contributes to improving the rutting, thermal, and fatigue cracking resistance of asphalt binder and ultimately the response of asphalt pavements.

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Rheological evaluation of asphalt blends at multiple rejuvenation and aging cycles

Cited by 25 publications

References 8 publications

100% recycled high-modulus asphalt concrete mixture design and validation using vehicle simulator

100% recycled high-modulus asphalt concrete mixture design and validation using vehicle simulator

Influence of soft binder and rejuvenator on the mechanical and chemical properties of bituminous binders

Evaluating the Physical and Rheological Properties of Rejuvenated Styrene‐Butadiene‐Styrene‐Modified Asphalt Binders

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