Glass Transition and Phase Stability in Asphalt Binders

Kříž, Pavel; Stastna, Jiri; Zanzotto, Ludo

doi:10.1080/14680629.2008.9690158

Cited by 85 publications

(27 citation statements)

References 61 publications

(65 reference statements)

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“…has been changed in: "After the transformation of the frequency domain to the temperature domain (with the testing frequency  0 =0.01 Hz), one can see that samples BA and B1 again exhibited very similar behaviour (BA is reported in Figure 8). Moreover, at the chosen frequency [51] the estimated glass transition temperatures (the position of maximum of G"(T, 0 )), in both cases, were in agreement with the DSC values ( Table 2)." Reference 51 was added.…”

supporting

confidence: 72%

Rheological properties of asphalt/SBS/clay blends

Polacco

Kříž

Filippi

et al. 2008

European Polymer Journal

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140

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The effect of the addition of clay as a third component in polymer modified asphalts has been investigated. After a preliminary investigation on the binary asphalt/clay and polymer/clay blends, the tertiary blends were prepared by adding the clay and polymer to the asphalt, either separately or in the form of a premixed master batch. Intercalated nanocomposites with comparable interlayer distances and glass transition temperatures were obtained in both cases. However, the results show that the mixing procedure significantly affected the final rheological properties. The master curves built in the linear viscoelastic range and represented in both the frequency and the temperature domains help to visualize and evaluate such differences. Suggested Reviewers:Dear Professor Vancso, I'm submitting the new version, revised according to referees' suggestions. I would like to thank you and the referees for helping us in improving the quality of the paper. AbstractThe effect of the addition of clay as a third component in polymer modified asphalts has been investigated. After a preliminary investigation on the binary asphalt/clay and polymer/clay blends, the tertiary blends were prepared by adding the clay and polymer to the asphalt, either separately or in the form of a premixed master batch. Intercalated nanocomposites with comparable interlayer distances and glass transition temperatures were obtained in both cases. However, the results show that the mixing procedure significantly affected the final rheological properties. The master curves built in the linear viscoelastic range and represented in both the frequency and the temperature domains help to visualize and evaluate such differences.

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supporting

confidence: 72%

Rheological properties of asphalt/SBS/clay blends

Polacco

Kříž

Filippi

et al. 2008

European Polymer Journal

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140

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“…Indeed, the use of MDSC instead of DSC helps to better recognize the T g , the shift of which is a good indicator of the interactions in multicomponent systems. In this respect, the calorimetric studies by Masson et al [50,51] and Kriz et al [52,53] are extremely interesting. Rheology may also be a valid approach to evaluate the effect of mixing on T g .…”

Section: Mechanism Of Sbs Swelling and Morphological Evidences Of Malmentioning

confidence: 96%

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

Polacco

Filippi

Merusi

et al. 2015

Advances in Colloid and Interface Science

468

172

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During the last decades, the number of vehicles per citizen as well as the traffic speed and load has dramatically increased. This sudden and somehow unplanned overloading has strongly shortened the life of pavements and increased its cost of maintenance and risks to users. In order to limit the deterioration of road networks, it is necessary to improve the quality and performance of pavements, which was achieved through the addition of a polymer to the bituminous binder. Since their introduction, polymer-modified asphalts have gained in importance during the second half of the twentieth century, and they now play a fundamental role in the field of road paving. With high-temperature and high-shear mixing with asphalt, the polymer incorporates asphalt molecules, thereby forming a swallowed network that involves the entire binder and results in a significant improvement of the viscoelastic properties in comparison with those of the unmodified binder. Such a process encounters the well-known difficulties related to the poor solubility of polymers, which limits the number of macromolecules able to not only form such a structure but also maintain it during high-temperature storage in static conditions, which may be necessary before laying the binder. Therefore, polymer-modified asphalts have been the subject of numerous studies aimed to understand and optimize their structure and storage stability, which gradually attracted polymer scientists into this field that was initially explored by civil engineers. The analytical techniques of polymer science have been applied to polymer-modified asphalts, which resulted in a good understanding of their internal structure. Nevertheless, the complexity and variability of asphalt composition rendered it nearly impossible to generalize the results and univocally predict the properties of a given polymer/asphalt pair. The aim of this paper is to review these aspects of polymer-modified asphalts. Together with a brief description of the specification and techniques proposed to quantify the storage stability, state-of-the-art knowledge about the internal structure and morphology of polymer-modified asphalts is presented. Moreover, the chemical, physical, and processing solutions suggested in the scientific and patent literature to improve storage stability are extensively discussed, with particular attention to an emerging class of asphalt binders in which the technologies of polymer-modified asphalts and polymer nanocomposites are combined. These polymer-modified asphalt nanocomposites have been introduced less than ten years ago and still do not meet the requirements of industrial practice, but they may constitute a solution for both the performance and storage requirements.

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“…Even for a given case, due to the complexity of bitumen composition, the bitumen usually has a quite broad temperature range for glass transition or shows multiple T g s (e.g. Adedeji et al, 1996;Chambrion, Bertau, & Ehrburger, 1996;Kriz, Stastna, & Zanzotto, 2008;Masson, Polomark, & Collins, 2005). As for polymer modifiers, it is simple for amorphous homopolymers like PS, as they have only one T g and do not crystallize.…”

Section: Dynamic Asymmetry Within Pmbmentioning

confidence: 98%

Towards the development of a viscoelastic model for phase separation in polymer-modified bitumen

Zhu

Kringos

2015

Road Materials and Pavement Design

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The development of a viscoelastic model for phase separation in polymer-modified bitumen (PMB) is proposed in this paper. PMB is considered as a pseudo-binary blend. Equilibrium thermodynamics and phase separation dynamics of PMB are discussed. The effects of dynamic asymmetry on phase separation in PMB are analysed with related theories and some image data. Based on the discussion in this paper, it is concluded that the effects of dynamic asymmetry between bitumen and polymer should be taken into consideration when studying phase separation in PMB. By analysing related literature and image data, it is found that some features of viscoelastic phase separation are shown during the phase separation process in some PMBs. It is possible to develop a viscoelastic model for PMB to describe its phase separation behaviour. The stress-diffusion coupling would play a key role in the model by introducing composition-dependant mobility, shear and bulk stress.

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Glass Transition and Phase Stability in Asphalt Binders

Cited by 85 publications

References 61 publications

Rheological properties of asphalt/SBS/clay blends

Rheological properties of asphalt/SBS/clay blends

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

Towards the development of a viscoelastic model for phase separation in polymer-modified bitumen

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