Correlation between thermal and rheological studies to characterize the behavior of bitumen

Mouazen, Mouhamad; Poulesquen, Arnaud; Vergnes, Bruno

doi:10.1007/s00397-011-0534-5

Cited by 27 publications

(21 citation statements)

References 20 publications

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“…The curves displayed in the Black space fall approximately into a single curve at each condition, i.e., unaged and aged. This implies that TTSP can be applied . From Black diagrams, the changes in rheological properties after ageing are seen as an increase in elastic response (decrease in phase angle) within the whole range of | G *|.…”

Section: Resultsmentioning

confidence: 99%

Influence of ageing on viscoelastic properties of PMMA/ATH modified bitumen

Šušteršič

Nikonov²,

Valant³

2014

Polymer Composites

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This article deals with the influence of the ageing treatment on the viscoelastic behavior of PMMA/ATH modified paving bitumen. Waste composite powder (polymethyl methacrylate filled with aluminium trihydrate)-PMMA/ATH and Fischer-Tropsch wax were used as modifying agents for 70/100 paving grade bitumen. Measurements in intermediate temperature range were carried out under oscillatory shear conditions on a dynamic shear rheometer (DSR). Creep testing in low temperature range was conducted on a bending beam rheometer (BBR). The time-dependent behavior of investigated samples was presented in a form of relaxation moduli G(t) and E(t). Dynamic moduli, i.e., G 0 (x) and G 00 (x), were converted to relaxation modulus G(t) using the Schwarzl method. The interconversion between tensile creep compliance D(t), and tensile relaxation modulus E(t) was performed using the Hopkins and Hamming approach. It was found that modified binders are less susceptible to the oxidation process during bitumen ageing, since the viscoelastic properties changed less than for the base bitumen. Our results indicate that the use of waste PMMA/ATH in the selected bitumen altered the time-dependent deformation behavior of asphalt binder. The effect of ageing treatment on material functions was particularly manifested at longer times. Different stress relaxation behavior of modified binders could result in higher deformation resistance of asphalt mixture. POLYM. COMPOS., 00:000-000,

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Section: Resultsmentioning

confidence: 99%

Influence of ageing on viscoelastic properties of PMMA/ATH modified bitumen

Šušteršič

Nikonov²,

Valant³

2014

Polymer Composites

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“…The rate of creep deformation is a function of properties of material, exposure time, exposure temperature and the structural load applied [20,21]. In evaluation of linear viscoelastic behaviour of HMA materials, researchers generally agreed that creep may be recoverable over time after shear stress relief if permanent deformation is not reached [22][23][24]. Based on standard protocols, static axial stresses of values between 100 -206.9 kPa are usually applied as depictions and threshold measures of resilience to standardized field pavement tyre pressures which is as high as 828 kPa under ambient temperature condition in excess of 60 o C (140 o F) [16,19,36].…”

Section: Literature Reviewmentioning

confidence: 99%

“…Asphalt aging is a physic-chemical process contra indicated against temperature susceptibility and volatilization which can affect the volume, entropy and enthalpy of material [25][26][27][28][29]. The mechanical response of asphalt is viscous at high temperatures and glassy or brittle at low-temperatures [24]. In terms of rheological properties, it follows that the mix may become stiffer, inelastic, and more brittle after ageing.…”

Section: Literature Reviewmentioning

confidence: 99%

Creep and morphological evaluation of polypropylene waste modified asphalt for pavement applications

Otuoze¹,

Shuaibu²,

Ahmed³

et al. 2020

Nig. J. Tech.

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Synoptic findings by researchers have revealed tremendous physic-chemical improvements of polymer modified mixes over the conventional asphalt. Traditionally, laboratory mechanical properties were carried out for asphalt testing, but cannot calibrate simple performance test (SPTs) criteria for fatigue and field performance. Marshall test-sized specimens of polymer asphalt mixtures were engineered with arbitrary contents of 0 to 3.0% polypropylene waste admixed with 4.5 to 6.5% bitumen contents based on relevant literature. Creep deformation involves uniaxial static creep (USC) test using BS 598-111. Morphological examinations were test with Hitachi S-4700 field-emission scan-electron-microscope (FE-SEM). Thirdly, thermal degradation was determined using Shimadzu TGA-50 thermo-gravimetric analyzer. The results showed creep resistivity with fatigue recovery of 23.2% and 28.9% strain reduction at 10oC and 60oC respectively from the optimal 2.0% polypropylene and 6.0% bitumen compared to the control mix. Also, the same mix produced well dispersed and better enhanced pore packaging micro-structure capable of resisting ageing volatization under severe traffic and environmental loading conditions considered. Keywords: Asphalt pavement, polypropylene, creep deformation, age volatization and microstructure

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“…Ozone is more reactive than oxygen, and by conducting reactions at cryogenic temperatures, ozonation is the dominant reaction. This approach is impractical with oilsands bitumen, which is very viscous at low temperatures and has a glass-transition temperature of around −20 °C …”

Section: Introductionmentioning

confidence: 99%

Ozonation of Oilsands Bitumen

Hendessi

Klerk

2016

Energy Fuels

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The conversion of bitumen with ozone should in principle lead to oxidative degradation, as opposed to the increase in viscosity found during the reaction with oxygen because ozonation can lead to CC scission by ozonolysis. However, when bitumen was reacted with ozonated air at 140−160 °C, the viscosity increased compared to conversion with air under the same conditions. To explain these observations, the ozonation of model compounds of various hydrocarbon and heterocyclic compound classes was studied. The selectivity and nature of the oxidation products from ozonation were different from that of autoxidation. Ozonolysis that led to the ring opening of aromatics was observed. At low conversion (<10%), the addition product selectivity of the five-membered cyclic hydrocarbons, indane and indene, was less after reaction with ozonated air than with air. It appears that the observed increase in bitumen viscosity was due to the increased free radical addition product selectivity of heterocyclic compounds, which was higher after reaction with ozonated air than with air. It was also found that at higher conversion (>10%), the increase in oxidized material caused a dramatic increase in addition product selectivity during ozonation. A plausible reaction pathway for addition product formation was proposed on the basis of the Criegee mechanism. The nature of unique addition products from ozonation that were not observed after autoxidation could be explained in terms of the decomposition of the ozonide and recombination of the free radical fragments.

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Correlation between thermal and rheological studies to characterize the behavior of bitumen

Cited by 27 publications

References 20 publications

Influence of ageing on viscoelastic properties of PMMA/ATH modified bitumen

Influence of ageing on viscoelastic properties of PMMA/ATH modified bitumen

Creep and morphological evaluation of polypropylene waste modified asphalt for pavement applications

Ozonation of Oilsands Bitumen

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