Engineering Properties of EVA-Modified Bitumen Binder for Paving Mixes

Panda, Mahabir; Mazumdar, Mayajit

doi:10.1061/(asce)0899-1561(1999)11:2(131)

Cited by 77 publications

(44 citation statements)

References 1 publication

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“…This modest content of polar groups led to the production of unstable blends for which the entire phase separation process occurred within the first 24 h of storage at 163°C. Panda and Mazumdar [125] obtained stable mixtures by using up to 10% of two EVAs containing 18% and 28% by weight of VA. Results presented are consistent with the idea of a high VA content being helpful for asphalt/polymer interactions, but other available data indicate that this is not necessarily the unique and leading parameter to be considered.…”

Section: Asphalt Interaction With Eva and Other Ethylene-based Plastomentioning

confidence: 99%

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

498

184

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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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Section: Asphalt Interaction With Eva and Other Ethylene-based Plastomentioning

confidence: 99%

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

498

184

View full text Add to dashboard Cite

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“…After SBS, EVA is probably the most important polymeric modifier for asphalts and an abundant literature is already available, both for the virgin [32][33][34][35] and recycled [36][37][38][39][40][41] polymer. At the same time, EVA copolymers were intensively investigated for the preparation of nanocomposites [15,17,[42][43][44].…”

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confidence: 99%

Internal structure and linear viscoelastic properties of EVA/asphalt nanocomposites

Sureshkumar

Filippi

Polacco

et al. 2010

European Polymer Journal

104

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The effect of the addition of two different organoclays as a third component in polymer modified asphalts has been investigated. Ternary mixtures were prepared by adding clay and poly(ethylene-covinylacetate) to the asphalt, either separately, or in the form of a premixed master batch. The performed characterizations allowed the determination of how the two methods of mixing influence the interactions between asphalt and polymer and therefore the final rheological properties. In particular, it was shown that the clay had a compatibilizing effect on asphalt and polymer and that a high compatibility between clay and polymer led to a better dispersion of the polymer in the asphalt, thus influencing the final rheological properties of the studied systems.

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“…They indicated that PE-modified mixes were able to resist rutting better than conventional materials. Panda and Mazumdar (1999) developed and evaluated a bituminous paving binder containing reclaimed PE and used lowdensity PE (LDPE) for the modification of bitumen. Airey and Brown (1998) investigated the rheological changes associated with short-term and long-term laboratory ageing of various unmodified and polymer-modified bitumens.…”

Section: Introductionmentioning

confidence: 99%