Effect of Superpave Short-Term Aging on Binder and Asphalt Mixture Rheology

Ramadan, Khaled Z.; Abo-Qudais, Saad

doi:10.3311/pptr.10477

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…The frequency sweep tests were performed at temperatures ranging from 10 o C to 82 o C with 6 o C increments and a range of frequencies between 0.159 Hz and 15.92 Hz, where the former represented the anticipated field temperatures and the latter simulated the speed of traffic up to 90 km/hr (Ramadan & Abo-Qudais, 2017). The test was run in two phases.…”

Section: Dyamic Shear Rheometer (Dsr) Frequency Sweep Testmentioning

confidence: 99%

Characterisation of Acrylonitrile Styrene Acrylate Modified Asphalt Cement with Nano Iron Oxide and Nano Silica Particles

Korutürk¹,

Alas²

2023

jkukm

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The current study investigated the physical properties and rheological characteristics of asphalt cement (AC) modified by nano ironoxide (Fe3O4) and nano silica (SiO2) particles. Seven different blends including base AC, Acrylete-StyreneAcrylonitrile (ASA)/ Nanosilica (Si) and ASA/ Nanoironoxide (Fe) were the subject of experimental investigations. ASA was used at 5% for all modified blends while the nanomaterials were blended in 3, 5 and 7% concentrations by the weight of AC. Temperature susceptibility, rotational viscosity (RV) and storage stability for the base and polymer nanocomposite modified asphalt cement (PNCAC) were evaluated by the physical testing procedures while the frequency sweep test and the multiple stress creep recovery (MSCR) tests were conducted using a dynamic shear rheometer. The results showed that, the viscoelastic properties of the ASA/Si and ASA/Fe modified binders were improved when subjected to a range of temperatures and loading conditions. ASA/Fe composite modified AC demonstrated superior high temperature performance characteristics while ASA/Si composite modified AC although presented less significant improvement at the high temperature conditions, it was also able to improve the intermediate temperature fatigue resistance of asphalt more than the ASA/Fe composite modified AC. The optimum concentration of additives were found to be 3 and 5% for the ASA/Fe and ASA/Si modified AC respectively. Further addition of nanomaterials beyond the abovementioned concentrations resulted in degradation of the enhancement in physical and rheological properties of PNCAC, which was associated to the occurrence of agglomeration of nanoparticles and phase separation between the polymer-nanomaterial-asphalt matrix.

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Section: Dyamic Shear Rheometer (Dsr) Frequency Sweep Testmentioning

confidence: 99%

Characterisation of Acrylonitrile Styrene Acrylate Modified Asphalt Cement with Nano Iron Oxide and Nano Silica Particles

Korutürk¹,

Alas²

2023

jkukm

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“…In this sense, reclaimed asphalt pavement (RAP) is among the effective ways to decrease bitumen consumption [9]. Aging of asphalt binders during construction and service time poses a significant problem in pavement engineering [10][11][12]. Oxidation and loss of volatile substances are the primary reasons for aging of asphalt binders.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Performance of Bio-Oils from Three Different Agricultural Wastes as Rejuvenators for Recycled Asphalt

Yalçın,

Yilmaz

2024

Turkish Journal of Civil Engineering

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The aim of this study was to investigate the possibility of using bio-oil obtained from pine cones, olive mill pomace, and wheat straw as rejuvenators for the reuse of aged asphalt binders. Additionally, the biomass used for bio-oil production was selected from waste materials. Therefore, it makes great contributions to both the environment and the economy. B50/70 bitumen was selected as the neat binder. The bio-oils used in the study were obtained as a result of pyrolysis. Bio-oil rejuvenators at 5%, 10% and 20% by the weight of the binder were added to the aged binder obtained from recycled asphalt mixtures to obtaine bioregenerated asphalts. The physical and rheological properties of bioregenerated asphalts were investigated and not compared on neat and aged binders through penetration, softening point, rotational viscometer and dynamic shear rheometer tests. In addition, the effects of temperature and biooil content on complex modulus properties were examined using response surface methods. It was foud that while the bio-oils increased the penetration values of the aged binders, they also decreased the softening point and viscosity values. The bio-oils significantly modified rutting resistance of the aged binder. The addition of bio-oil improved the viscous components and can rejuvenate the viscoelastic properties of aged asphalt binders to that of almost the original level. In addition, response surface methods results showed that the interactions between both independent variables were effective. Finally, high coefficient of determination (R2) values indicated good agreement between the actual and predicted values. It was recommended as a result of the study that 20% concentration of bio-oil should be used to rejuvenate the aged asphalt binder for reuse in pavement construction.

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