Rheological properties of road bitumens

Vinogradov, G. V.; Isayev, A. I.; Золотарев, В А; Verebskaya, E. A.

doi:10.1007/bf01523737

Cited by 41 publications

(28 citation statements)

References 19 publications

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“…ii) As far as we know, only one publication reports transient tests in the non-linear region, namely values of ~/+ (T, 9, t) [12].…”

Section: Hscoelastic Behaviour Of Asphaltsmentioning

confidence: 97%

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Non-linear behaviour of asphalts in steady and transient shear flow

Attané¹,

Soucémarianadin²,

Turrel³

et al. 1984

Rheol Acta

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Steady-state and transient shear stress and normal stress data were obtained for four asphalts with a modified Weissenberg Rheogoniometer. Interest was specially related to non-linear behaviour at high shear-rates. The time-temperature superposition principle was found to hold in non-linear behaviour. Moreover, steady-state and transient data could be plotted as master curves irrespective of the nature of the asphalts. In particular, the master curve of steadystate viscosity could be extended to results published in the literature. In the nonlinear region the shear stress relaxation after cessation of a steady shear rate becomes a function of ~ t only and is related to the primary normal-stress coefficient, as predicted by the Yamamoto equation. In the shear stress growth experiment an overshoot is obtained at a constant strain close to 1.5, independent of the rate of strain.

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“…ii) As far as we know, only one publication reports transient tests in the non-linear region, namely values of ~/+ (T, 9, t) [12].…”

Section: Hscoelastic Behaviour Of Asphaltsmentioning

confidence: 97%

“…[12] claimed that the stress-overshoot behaviour is related to the asphaltene content. As this was based on a comparison of the shear stress growth of different asphalts at the same shear rate but not at the same value of ~ (T, ~)/r/0 (T), we believe that it is not convincing.…”

Section: Analysis Of Start-up Testmentioning

confidence: 98%

Non-linear behaviour of asphalts in steady and transient shear flow

Attané¹,

Soucémarianadin²,

Turrel³

et al. 1984

Rheol Acta

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“…It has been noted in [14] that for bitumens the sensibility of dynamic characteristics G ~ and G" to the change in deformation amplitude depends essentially on their composition structure and the degree of branching of the structural frame. This is observed in a similar way for coal tars: the linear deformation region is reduced with the growth of frequency and temperature, and the higher the number of formed complexes able to be destructed, the more it is reduced.…”

Section: Results Of the Experimental Studies Obtained At Periodic Defmentioning

confidence: 99%

“…It has been shown [6] that for bitumens in the region of low shear rates, v (t) is monotonic and maxima appear only at rather high values of the shear rate. This can be explained by a trangression of the shear strength limit, which is characterized by a value vss, and is connected with the destruction of the structure of the material, that occurs before attaining the steady flow mode [7].…”

Section: Introductionmentioning

confidence: 97%

“…The vs~ value grows with the increase of concentration of the dispersed phase and with the decrease of viscosity of the dispersion medium. The composition of bitumens as materials which represent typical dispersed systems or systems, that are similar to concentrated polymer solutions [8], depending on their structural particularities, makes it possible to consider dispersed-type bitumens as convenient rheological models and to analyse the pecul~antus of the deformation of tars in comparison with these. This paper is devoted to the investigation of the viscoelastic behaviour of tars with different compositions in different modes of shear deformation (periodic, steady, combined periodic-steady) in a wide region of temperatures and parameters of the mechanical deformation.…”

Section: Introductionmentioning

confidence: 99%

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The peculiarities of the rheological behaviour of coal tars

Yanovsky

Zhdanyuk²,

Золотарев³

et al. 1988

Rheol Acta

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Abstract:The results are discussed of rheological studies of coal tars with different concentrations of substances insoluble in toluene at periodical, steady-state and combined periodical-steady shear deformations in a wide range of deformation frequencies, rates and amplitudes in the temperature region from 223 to 333 K. The temperatures of structural and mechanical glassing To, the activation energies of viscous flow and initial viscoelastic constants of these systems have been determined. Temperature and temperature-frequency dependencies of dynamical parameters have been obtained, the pre-steady-state and the steady-state flow modes of permanent deformation have been studied and thixotropic parameters have been evaluated at the combined action of vibration and permanent deformation.

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Use of isocyanate production waste in the preparation of improved waterproofing bitumen

Singh

Tarannum

Gupta

2003

J of Applied Polymer Sci

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Waste residue generated during the production of toluene diisocyanate was used as a modifier in making improved waterproofing bitumen. The waste particles were surface-modified with stearic acid. Various bitumen blends based on untreated particles, surface-treated particles, and a combination of an SBS elastomer and waste particles were prepared. The optimized blends were subjected to evaluate their response against temperature and frequency sweeps. It was observed that improvement of the softening point and reduction in penetration could be correlated with the blend morphology in terms of the compatibility between the waste particles and the bitumen. The increased glass transition temperature and satisfactory phase miscibility in the modified bitumen observed in MDSC and DMA traces supported these findings. The coefficient of linear thermal expansion of the modified bitumen was found to be 1.21 ϫ 10 Ϫ4 / o C. The rheological studies revealed that time-dependent properties of the modified bitumen were better in terms of its stiffness and elasticity than that of neat bitumen. The applicability of the WilliamsLandel-Ferry (WLF) equation confirms the superior temperature-dependent response of the modified systems over the control. It was noticed that stearate-treated waste-modified bitumen gives the best results in terms of a high complex modulus and a low phase angle. The newly formulated bituminous blend based on stearate-treated waste meets the requirement of existing standard specifications for waterproofing felt.

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Rheological properties of road bitumens

Cited by 41 publications

References 19 publications

Non-linear behaviour of asphalts in steady and transient shear flow

Non-linear behaviour of asphalts in steady and transient shear flow

The peculiarities of the rheological behaviour of coal tars

Use of isocyanate production waste in the preparation of improved waterproofing bitumen

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