Polymer modified asphalts as viscoelastic emulsions

Lesueur, Didier; Gérard, Jean‐François; Claudy, P.; Létoffé, J. M.; Martin, Didier; Planche, Jean‐Pascal

doi:10.1122/1.550918

Cited by 83 publications

(63 citation statements)

References 19 publications

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“…A shift in T g between the pure and the blended states signals mixing, and this is conveniently measured by differential scanning calorimetry (DSC) [2]. With SBS-bitumen blends, however, DSC lacks the capability of resolving overlapping T g s and only the T g of the predominant bitumen-rich phase is reported [13,14]. In contrast, T g s for bitumen-rich, polybutadiene-rich and polystyrenerich phases were reported with dynamic mechanical analysis [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Glass transitions and amorphous phases in SBS–bitumen blends

2005

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1016/j.tca.2005.02.017Thermochimica Acta, 436, 1-2, pp. 96-100, 2005-10-01 Glass transitions and amorphous phases in SBS-bitumen blends Masson, J-F.; Polomark, G. M.; Collins, P. Glass transitions and amorphous phases in SBSbitumen blendsMasson, J-F., Polomark, G.; Collins, P. NRCC-44491 AbstractBlends of bitumen with 3-10% of a styrene-butadiene-styrene (SBS) block copolymer were investigated by means of modulated differential scanning calorimetry (MDSC) in an effort to better understand the miscibility and structure of the blends, along with the composition of the mixed phase(s). This relied on the measurements of the glass transition temperatures (T g ) in bitumen and SBS in their blended and unblended states.In the unblended state, bitumen showed four T g s, and SBS showed two. In the blends, a new T g arose from a phase of mixed composition, which contained polybutadiene (PB) segments and about 30% of the maltenes. The blends also showed anti-plasticization as a shift of the T g s from the paraffins in bitumen and the PB block in SBS moved away from each other. The results indicate that the PB block has good interactions with bitumen, but that the polystyrene (PS) block does not.

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Section: Introductionmentioning

confidence: 99%

Glass transitions and amorphous phases in SBS–bitumen blends

2005

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“…Several authors have claimed that the time-temperature superposition principle (TTSP) fails at high temperature, especially for high asphaltene and/or high crystalline content materials (Lesueur et al 1996) and is, therefore, very unlikely to apply to most polymer modified bitumens (Lesueur et al 1998). In contrast, some others sustain that the mechanical spectrum of many modified bituminous products can be represented, reasonably well, by master curves of their linear viscoelastic material functions (Stastna and Zanzotto 1999).…”

Section: Low In-service Temperaturesmentioning

confidence: 99%

End-performance evaluation of thiourea-modified bituminous binders through viscous flow and linear viscoelasticy testing

et al. 2013

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Straight-run bitumens are no longer suitable in new asphalt mixtures. Consequently, the use of modified bitumens has become more important. In order to both improve binders mechanical properties and prevent it from phase separation whilst stored at high temperature, the paving industry is currently developing new modification routes based on reactive agents. This work studies the use of thiourea, which has proven to efficiently broaden the temperature interval over which the binder demonstrates an adequate performance. On the one hand, viscous flow and dynamic shear tests indicate an enhancement in the high in-service temperature strength, along with a reduced thermal susceptibility. On the other hand, results of dynamic flexural tests reveal a significant decrease in the binder glass transition temperature. Finally, the use of master curves and a further frequency/temperature conversion are proposed, in order to attain a suitable viscoelastic characterisation of bituminous binders at low temperatures.

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“…During last decade we have chosen double logarithmic plots of phase angle versus complex modulus G* (the so called Black diagrams or Mavridis-Shroff plots [26]) to investigate the thermorheological complexity (breakup of frequencytemperature superposition) of some polymers [27][28][29]. Moreover, the failure of frequency-temperature superposition in dynamic viscoelastic results of bitumen has also been demonstrated using this rheological technique [12,25,30,31]. This is not surprising considering the complexity of bitumen and the fact that measurements were carried out in a range of temperatures (from -20 to 70ºC) which includes the glass transition temperatures of maltenes and asphaltenes.…”

Section: Thermorheological Behaviour: Frequency-temperature Superposimentioning

confidence: 99%

“…As for the rest of the aforementioned polymer systems, the observed EVA swelling is a consequence of the physical distillation derived from the interaction of the polymer matrix with saturate oils. The concept of physical distillation was applied to polymer modified bitumens by Lesuer et al [12]. Notwithstanding the role played by polymer swelling in the required physical properties of waterproofing membranes, not many papers deal with the task of measuring the relative proportion of bitumen to polymer phase after mixing process is achieved.…”

Section: Introductionmentioning

confidence: 99%

“…Traditionally the most successful polymer systems for modifying bitumen for roofing purposes are SBS and APP. Fluorescent microscopy, *Address correspondence to this author at the Polymer Science and Technology Department and Polymer Institute POLYMAT, Faculty of Chemistry, University of the Basque Country, San Sebastian, Spain; Tel: +34 943 018184; Fax: +34 943 015270; E-mail: antxon.santamaria@ehu.es differential scanning calorimetry (DSC) and mechanical thermal analysis (DMTA) have been used to investigate bitumen/SBS blends [3][4][5][6][7][8][9][10][11][12][13][14] and bitumen/APP blends [2,[13][14], as well as bitumen mixtures with ABS [15], polystyrene [15], polyethylene [16], polybutadiene [16], polyvinyl chloride [5], chlorinated polyethylene [16], ethylene-propylene diene monomer (EPDM) [5,17] and isocyanate [18]. The use of ethylene-vinyl acetate (EVA) as a bitumen modifier for membranes has also been reported in the literature [15,[19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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