Network morphology of straight and polymer modified asphalt cements

Rozeveld, Steven J.; Shin, E. Eugene; Bhurke, Alekh; France, Larry; Drzal, Lawrence T.

doi:10.1002/(sici)1097-0029(19970901)38:5<529::aid-jemt11>3.0.co;2-o

Cited by 71 publications

(59 citation statements)

References 15 publications

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“…The formation of this microstructure was explained by the molecular cocktail present in bitumen, ranging from low molecular weight compounds, such as saturates and aromatics, to large-size asphaltenes (Shell-Bitumen-UK, 1990). Moreover, it was found that the string-like structures change their properties with aging and, even more interestingly, that they align under external loading (Rozeveld et al, 1997).…”

Section: Figure 1 Multiscale Model For Asphaltmentioning

confidence: 99%

“…This scale accounts for the heterogeneous nature of bitumen, represented by string-like structures embedded in a matrix substance (Rozeveld et al, 1997). The formation of this microstructure was explained by the molecular cocktail present in bitumen, ranging from low molecular weight compounds, such as saturates and aromatics, to large-size asphaltenes (Shell-Bitumen-UK, 1990).…”

Section: Figure 1 Multiscale Model For Asphaltmentioning

confidence: 99%

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Microstructure-based identification of bitumen performance

Stangl¹,

Jäger²,

Lackner³

2006

Road Materials and Pavement Design

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Motivated by recent progress in both experimentation and the micromechanical description of the behavior of multi-composed materials, a multiscale model for asphalt is currently developed at the Christian Doppler laboratory for "Performance-Based Optimization of Flexible Pavements" at Vienna University of Technology. This model allows us to relate macroscopically observable asphalt properties to finer-scale information. Since the mechanical properties of asphalt and the influence of environmental conditions (temperature, aging) originate from the binder properties, a proper characterization of bitumen is essential for the predictive capability of the anticipated multiscale model. In this paper, the characterization of bitumen, comprising the bitumen chemistry, its microstructure, and its viscoelastic properties, is presented for two types of bitumen (standard and polymermodified bitumen) considering the unaged and aged state. The obtained results provide new insight into the durability behavior of binders, explained by changes of the chemical composition, the microstructure, and the micromechanical properties of bitumen.

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Section: Figure 1 Multiscale Model For Asphaltmentioning

confidence: 99%

Section: Figure 1 Multiscale Model For Asphaltmentioning

confidence: 99%

Microstructure-based identification of bitumen performance

Stangl¹,

Jäger²,

Lackner³

2006

Road Materials and Pavement Design

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“…The crosslinking yield of polymers could be improved remarkably after gamma irradiation (García-Castañeda et al, 2010). In the case of SBS modifier, although the skeleton of SBS reticulations was destroyed, the damage of aged SBS MA mainly occurred on the outer surface of SBS particles and no obvious change occurred in the inner of SBS particles during the ageing process (Rozeveld et al, 1997). This provides a approach to regenerate the damaged reticulations in aged SBS MA.…”

Section: Introductionmentioning

confidence: 92%

The Regeneration of Aged SBS Modified Asphalt via Re-reticulating SBS Particles Under Gamma Irradiation

Zhu

Zhou

Wang

2014

Petroleum Science and Technology

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The damaged reticulation structure of SBS modifier was considered to be a main reason for the deterioration of pavement performances. The authors regenerated the damaged reticulation structure of aged SBS modified asphalt (SBS MA) by a gamma irradiation technology and assessed its potential applications. Changes of morphologies and chemical components in regenerated SBS MA were investigated by polarizing microscopy and Fourier transform infrared spectroscopy, respectively. Physical properties of regenerated SBS MA were measured to assess its potential applications. Results showed that reticulations were largely restored after 40 kGy irradiation and met the demand of pavement performances.

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“…Bitumen is also known to be a colloid in which asphaltenes (n-pentane insoluble) [14] form complex micelles dispersed into an oil phase of saturated paraffins, aromatics, and resins [1,15,16] with weak chemical affinity for aggregate, whereas the aggregate is characterized by a strong affinity for water. The result is that bitumen can be easily replaced by water.…”

Section: The Structure Of Bitumen and Its Interaction With Mineral Agmentioning

confidence: 99%

Adhesion Promoters in Bituminous Road Materials: A Review

Rossi

Teltayev²,

Angelico

2017

Applied Sciences

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Featured Application:The adhesion between aggregate and bitumen is crucial in asphalt pavements and has a strong influence on the service time of the road. Thus, the addition of adhesion promoters is gaining importance, particularly with regard to emerging and more sustainable technologies for asphalt production, which aim to reduce the working temperature, save energy, and guarantee the safety of specialized personnel. The present work offers an overview on physical and chemical properties of most common types of adhesion promoters currently used in asphalt industry and tries to build a bridge between scientific research and technological application.Abstract: This review focuses on certain classes of organic compounds known variously in the specific literature of asphalt as adhesion promoters, antistripping agents, wetting agents, antistrips, or adhesion agents. These kinds of organic additives are currently formulated to enhance the bitumen coating of mineral aggregates and improve the workability of asphalt mixtures. In this review, the term "adhesion promoters" includes both synthetic organic compounds as well as those extracted from natural resources, mixed in trace amounts to bitumen. Their main role is to alter the interfacial energy, so that the presence of water, even in trace, does not weaken the bitumen-aggregate bond and tends to favor adhesion. The report also considers the chemical functionalities that play a predominant role in bonding, as well as the effects of surface modification of the aggregate due to the presence of adhesion promoters in pre-blended bituminous mixtures. Although bitumen is widely used in road pavement construction and the discussion is mainly addressed to the improvement of adhesion in road materials, adhesion and wetting properties can also represent a general issue in various bitumen-based industrial products.

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Network morphology of straight and polymer modified asphalt cements

Cited by 71 publications

References 15 publications

Microstructure-based identification of bitumen performance

Microstructure-based identification of bitumen performance

The Regeneration of Aged SBS Modified Asphalt via Re-reticulating SBS Particles Under Gamma Irradiation

Adhesion Promoters in Bituminous Road Materials: A Review

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