Asphalt/polyethylene blends: Rheological properties, microstructure and viscosity modeling

Vargas, M.A.; Vargas, Miguel; Sanchez-Solis, A.; Manero, Ο.

doi:10.1016/j.conbuildmat.2013.03.064

Cited by 98 publications

(41 citation statements)

References 27 publications

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“…Nevertheless, they showed a small difference in all parameters (especially in the rheological ones) of the top and bottom portions of the test tube compared to those obtained with the base asphalt. The effect of MAH grafting was also studied by Li et al [268], da Silva et al [269], and Yeh et al [270], who did not show storage-stability data, and more recently by Vargas et al [271], who evaluated the thermal stability, morphology, and viscoelastic properties of asphalts modified by an LDPE, an HDPE, and a BHDPE (which is a bimodal high-density PE) and with the corresponding maleic grafted polymers obtained through reactive extrusion. From FM, it can be seen that biphasic materials were obtained in all cases: the LDPE was dispersed in isolated spherical particles, which became smaller after grafting; in the case of HDPE, the polymer swelling was almost absent without grafting, while after the grafting, the PRP covers the entire image, indicating an important effect of the MAH.…”

Section: Compatibilization Of Asphalt/polyolefin Blendsmentioning

confidence: 77%

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

503

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: Compatibilization Of Asphalt/polyolefin Blendsmentioning

confidence: 77%

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

503

184

View full text Add to dashboard Cite

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“…Generally, traffic loading is a dynamic loading with a wide range of frequency and temperature conditions [16], and it is difficult for laboratory tests to cover such wide frequency and temperature ranges. Considering this, the time-temperature superposition principle (TTSP) was used in many researches to obtain rheological master curves of asphalts over a wide spectrum of frequencies [3,8,22]. In this paper, master curves of complex modulus and phase angle were illustrated (Fig.…”

Section: Intermediate and High Temperature Rheological Propertiesmentioning

confidence: 99%

Rheological properties of asphalts modified by waste tire rubber and reclaimed low density polyethylene

Yan

You

2015

Construction and Building Materials

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“…And they acknowledged that lower activation energies are preferred because viscosity changes slightly with changing the same temperature amplitude [10]. Mturi et al compared the differences of rheological properties between aged base asphalt binder and aged modified asphalt binder through rotational and oscillatory-derived viscosities test.…”

Section: Introductionmentioning

confidence: 99%

Aging mechanism of SBS modified asphalt based on chemical reaction kinetics

Wang

Sun

Qin

2015

Construction and Building Materials

101

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h i g h l i g h t sThe dynamic equation based on rheological measurements was used to analyze the aging mechanism. The activation energy of asphalt is not a constant and will change along with aging. We examine changes of molecular structure of asphalt under different aging states. a b s t r a c tResearch on aging mechanism of SBS modified asphalt can provide theoretical and technical support not only for the choice of asphalt pavement materials but also for recycling of SBS modified asphalt pavement. Dynamic equations of asphalt under different aging conditions were respectively established according to chemical reaction kinetics. And two kinds of micro analysis methods, component analysis and GPC (gel permeation chromatography), were used to analyze the change of asphalt composition and asphalt molecular structure during the aging process. In addition, the correlation between activation energy and asphalt microscopic components, asphalt molecular structure was analyzed through grey entropy theory analysis method. Different from previous research, the results demonstrate that the activation energy of asphalt is not a constant index. SBS network structure loses gradually due to the degradation of SBS modifier during the aging process. SBS modified asphalt after short-term aging degrades to more medium molecular size structure, which makes the activation energy become lower and improves asphalt temperature sensitivity. However, the SBS modifier after long-term aging has almost degraded completely, which increases the activation energy and makes asphalt temperature sensitivity approximate to base asphalt. The results of grey entropy theory analysis show that the activation energy will be reduced with the decrease of saturate content, the increase of medium molecular size structure content and resins content.

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Asphalt/polyethylene blends: Rheological properties, microstructure and viscosity modeling

Cited by 98 publications

References 27 publications

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

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

Rheological properties of asphalts modified by waste tire rubber and reclaimed low density polyethylene

Aging mechanism of SBS modified asphalt based on chemical reaction kinetics

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