2018
DOI: 10.1617/s11527-018-1263-3
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Effect of ageing on the morphology and creep and recovery of polymer-modified bitumens

Abstract: Polymer additives are used to improve the properties of road bitumens including their oxidative resistance. However, their usage as anti-oxidative materials remains relatively unclear. This study aims to investigate the changes in the morphology and the rheological response of polymer modified bitumens used in road pavement construction caused by ageing. An elastomer (radial styrene butadiene styrene, SBS) and a plastomer (ethyl vinyl acetate, EVA) polymer were mixed with one base bitumen at three polymer conc… Show more

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Cited by 67 publications
(33 citation statements)
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“…The second step is to remove instantaneously the stress to allow the sample to recover as function of their properties after the yield stress test and to reapply a constant load to the sample. Creep and recovery is widely used to evaluate the deformation mechanism of polymeric systems and, associated with other techniques, predict the behavior and workability characteristics of pharmaceutical systems (Cuciniello et al, 2018). In the creep phase (section I), after 355 s of stress load, the system reached maximum deformation, JMAX for that period of time, where was observed an instantaneous increase in strain (maximum creep, higher peak).…”
Section: Creep and Recoverymentioning
confidence: 99%
“…The second step is to remove instantaneously the stress to allow the sample to recover as function of their properties after the yield stress test and to reapply a constant load to the sample. Creep and recovery is widely used to evaluate the deformation mechanism of polymeric systems and, associated with other techniques, predict the behavior and workability characteristics of pharmaceutical systems (Cuciniello et al, 2018). In the creep phase (section I), after 355 s of stress load, the system reached maximum deformation, JMAX for that period of time, where was observed an instantaneous increase in strain (maximum creep, higher peak).…”
Section: Creep and Recoverymentioning
confidence: 99%
“…or polymeric wastes (plastic from agriculture, tire crumb rubber, etc.) [2][3][4][5][6][7]. This bitumen modification is achieved through a suitable dispersion of the polymer into the molten bitumen.…”
Section: Introductionmentioning
confidence: 99%
“…Besides the enhancement of the mechanical properties, polymer modified bitumen (PMBs) are expected to be stable at storage and ageing resistant [4]. However, if the oxidative mechanism of unmodified bitumen is relatively clear, in the case of PMBs the effect of polymers on the bitumen oxidative ageing needs to be investigated [4][5][6].…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, the effect of the thermo-oxidative degradation of the polymer chains on the mechanical response of PMBs needs to be investigated at higher strain levels. Nevertheless, this approach has not been well considered so far [6,26].…”
Section: Introductionmentioning
confidence: 99%
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