Effects of Waste Polypropylene Additive on the Properties of Bituminous Binder

Ahmedzade, Perviz; Demirelli, Kadir; Günay, Taylan; Biryan, Fatih; Alqudah, Omar

doi:10.1016/j.promfg.2015.07.029

Cited by 38 publications

(23 citation statements)

References 3 publications

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“…In addition, a similar reduction was found in the study by Ahmedzade et al [41], where 5% of PP, subjected to a polymerization reaction with maleic anhydride, was incorporated into a 62-dmm penetration grade bitumen. For the softening point temperature, the lower rate of increase was found in an investigation that used a base binder with an initial softening point of 53 • C [43], while the largest rate of increase was found in a PP with maleic anhydride in a base bitumen with an initial softening point of 50.5 • C [41].…”

Section: Polypropylene (Pp)supporting

confidence: 75%

“…In relation to viscosity, the RPMB that used isotactic PP [44,45], PP with maleic anhydride [41,44], or chlorinated PP [45], did not exceed the viscosity criterion of 3.0 Pa.s at 135 • C [46] established by SHRP. However, the mixtures that employed conventional PP surpassed this limit [22].…”

Section: Polypropylene (Pp)mentioning

confidence: 83%

“…Polypropylene can be found in food packaging, microwave-proof containers, pipes, and automotive parts [8]. PP is a plastomer that has a melting point superior to HDPE, around 145 • C and 162 • C [40][41][42]. It has been used as a mixture modifier through the wet process in percentages that range between 0.5% and 11% by weight of bitumen, while the most common percentage used for the production of RPMB ranges between 3% and 5% ( Figure 2).…”

Section: Polypropylene (Pp)mentioning

confidence: 99%

“…With the addition of polypropylene (PP), the ductility of the PMB is reduced. When 5% of PP is added to the binder, the reduction of the ductility is around 20% [47], but this reduction decreases to around 5% when using PP subjected to polymerization reaction with maleic anhydride [41]. In addition, in general terms, the complex modulus and phase angle properties show improvements at low frequency (low speed) and high temperature, providing better resistance to permanent deformation and; therefore, increasing the service life of the pavement.…”

Section: Polypropylene (Pp)mentioning

confidence: 99%

“…However, Giavarini et al [48] achieved storage stability by using 3% of polyphosphoric acid in mixtures with PP content between 2% and 7%. The most common modification processes involving PP are those that incorporate maleic anhydride [41,44] and PP subjected to pyrolysis [40,47].…”

Section: Polypropylene (Pp)mentioning

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: Polypropylene (Pp)supporting

confidence: 75%