Rheological studies of asphalt modified with elastomeric polymer

Gama, Dennyele Alves; Júnior, José Manoel Rosa; Mélo, Tomás Jefférson Alves de; Rodrigues, John Kennedy Guedes

doi:10.1016/j.conbuildmat.2015.12.142

Cited by 72 publications

(40 citation statements)

References 10 publications

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“…In addition, mixtures of PP + SBS were found to be stable for any percentage [42]. The stabilizing/compatibilizing agents that we found to be most commonly used in polymer combinations include maleic anhydride (MA) and sulphur [100], polyphosphoric acid (PPA) [100], reactive dioctyl phthalate (DP), and furfural extract oil (FEO) [90].…”

Section: Effect Of Reclaimed Polymer Combinationsmentioning

confidence: 88%

“…As the amount of polymer added increases, the complex modulus rises and the phase angle decreases [10,97,99]. Furthermore, in mixtures that combine polyethylene (PE) with another polymer, the G*/sinδ value rises as the percentage of this polymer increases [96,100], giving way to a higher rutting resistance and increasing the service life of pavements at high temperatures. However, in mixtures that use LDPE grafted with maleic anhydride, the G*/sinδ value decreases and the phase angle (δ) rises [98].…”

Section: Effect Of Reclaimed Polymer Combinationsmentioning

confidence: 99%

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Reclaimed Polymers as Asphalt Binder Modifiers for More Sustainable Roads: A Review

et al. 2019

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The use of polymer-modified binders in asphalt mixtures has become more widespread due to their reduced thermal susceptibility and improved rutting and fatigue resistance. Nevertheless, their high cost limits their application, thus making the use of reclaimed polymers (RP) an interesting alternative for both reducing price and extending the service life of pavements. This paper; therefore, presents a comparative review of the recycled polymers most commonly studied as bitumen modifiers: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), ethyl vinyl acetate (EVA), and ground tire rubber (GTR), in order to facilitate their selection and extend the use of the bitumen. The differences in terms of melting point, mixing conditions, and maximum quantity of added polymer are analyzed. Moreover, their effect on the mechanical behavior of the asphalt binders and their stability with and without the use of additives is presented. According to the literature revision, the performance of the new binder is more influenced by the kind of polymer that was incorporated and the mixing conditions than by the base bitumen that was chosen, although rheological evaluation is needed to fully understand the modification mechanisms of the modified binder. In general terms, plastomers have a stronger effect in terms of increasing the stiffness of the bitumen in comparison with crumb rubber (elastomers), thus providing an improved rutting resistance. The joint use of polyethylene (plastomer) and crumb rubber (elastomer) can be an interesting option for its recycling potential and mechanical performance, although further study is needed to achieve stable bitumen across the entire range of temperatures; additives, such as maleic anhydride (MA), are commonly employed to improve the stability of the binder and enhance its characteristics, but their use could limit the economic benefits of using recycled materials.

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Section: Effect Of Reclaimed Polymer Combinationsmentioning

confidence: 88%

Section: Effect Of Reclaimed Polymer Combinationsmentioning

confidence: 99%

Reclaimed Polymers as Asphalt Binder Modifiers for More Sustainable Roads: A Review

et al. 2019

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“…The plastomers have generally been used to improve the elastic properties of binders and to increase the permanent deformation resistance of the pavements. However, the elastomers have been used to improve the fatigue and low temperature crack resistance of the binders [5,13,14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Physical, Chemical, Microstructural and Rheological Properties of Reactive Terpolymer-Modified Bitumen

Geçkil

2019

Materials

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In this study, the change in the physical, chemical, microstructural, and rheological properties of a road bitumen modified with reactive terpolymer (Elvaloy®RET) was investigated. For this purpose, four different Elvaloy®RET percentages (0%, 0.4%, 0.8%, and 1.2% by wt.) were mixed with B 160/220 bitumen. Firstly, the obtained samples were subjected to a short and long-term aging process using a rotating thin-film oven test and pressurized aging vessel, respectively. Then, the engineering characteristics of the samples were investigated using X-ray diffraction, scanning electron microscopy, and conventional and Superpave bitumen tests. The results showed that Elvaloy®RET reacted with the main macromolecular groups in the bitumen, and that the modified bitumens behaved as a homogenous single phase structure as a result of this reaction. Conventional tests showed that Elvaloy®RET-modified bitumens were much harder than pure bitumen and had better aging resistance. Furthermore, the penetration classes of these bitumens changed and their temperature sensitivities decreased significantly. Rheological tests showed that the Elvaloy®RET additive increased the resistance of the bitumen against fatigue cracking and particularly permanent deformation. Moreover, the high temperature performance class of the bitumen also increased. However, parallel to the hardening of the bitumen, a reduction in its resistance to cracking at low temperature was observed.

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“…%. Gama and coworkers [24] found that the penetration of modified asphalt was 4.35 mm when the elastomer content was 0.5 wt. %.…”

Section: Conventional Physical Properties Analysis Of Wpp/orec-modifimentioning

confidence: 98%

Preparation, Structure, and Properties of Modified Asphalt with Waste Packaging Polypropylene and Organic Rectorite

Cheng

Fang

et al. 2019

Advances in Materials Science and Engineering

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The modified asphalt with waste packaging polypropylene (WPP) and WPP/organic rectorite (OREC) was prepared by the melt blending method. The effects of OREC on the physical and aging properties of WPP-modified asphalt were studied. The morphologies, microstructure, and thermal properties of WPP-modified asphalt and WPP/OREC-modified asphalt were characterized by fluorescence microscopy, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and thermogravimetry (TG). The results show that the composite-modified asphalt exhibits excellent ductility and plasticity when the contents of WPP and OREC are 4 wt. % and 1.5 wt. %, respectively. The deformation ability, softening point, ductility, and high-temperature storage stability of WPP-modified asphalt can be improved by adding the appropriate content of OREC. It is demonstrated that the composite-modified asphalt has an outstanding operational performance when the content of OREC is in the range of 1.5–2 wt. %. Compared with base asphalt, the high temperature performance of WPP-modified asphalt and WPP/OREC-modified asphalt is also improved significantly.

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Rheological studies of asphalt modified with elastomeric polymer

Cited by 72 publications

References 10 publications

Reclaimed Polymers as Asphalt Binder Modifiers for More Sustainable Roads: A Review

Reclaimed Polymers as Asphalt Binder Modifiers for More Sustainable Roads: A Review

Physical, Chemical, Microstructural and Rheological Properties of Reactive Terpolymer-Modified Bitumen

Preparation, Structure, and Properties of Modified Asphalt with Waste Packaging Polypropylene and Organic Rectorite

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