Enhancing the performance of blown asphalt binder using waste EVA copolymer (WEVA)

El-Rahman, Abd; El‐Shafie, M.; Mohammedy, M.M.; Abo-Shanab, Z.L.

doi:10.1016/j.ejpe.2017.08.002

Cited by 25 publications

(12 citation statements)

References 18 publications

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“…EVA is a thermoplastic polymer formed by co-polymerization of vinyl acetate and ethylene [ 133 ], where the vinyl acetate content is controlled through a copolymerization process [ 260 ]. EVA has been used in the modification of bitumen for decades due to the enhancement of molecular bonding between VA and carbonyl linkages that affects the polarity between the two materials [ 169 ].…”

Section: Virgin and Waste (Recycled) Plastomers To Improve Bitumen Performancementioning

confidence: 99%

Sustainable Polymers from Recycled Waste Plastics and Their Virgin Counterparts as Bitumen Modifiers: A Comprehensive Review

2021

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The failure of bituminous pavements takes place due to heavy traffic loads and weather-related conditions, such as moisture, temperature, and UV radiation. To overcome or minimize such failures, a great effort has been put in recent years to enhance the material properties of bitumen, ultimately improving field performance and increasing the pavement service life. Polymer modification is considered one of the most suitable and by far the most popular approach. Elastomers, chemically functionalised thermoplastics and plastomers * (* Note: notwithstanding the fact that in Polymer Science the word ‘plastomer’ indicates a polymer with the simultaneous behaviour of an elastomer and plastics (thermoplastics), this paper uses the term ‘plastomer’ to indicate a thermoplastic polymer as it is more commonly found in Civil and Pavement Engineering.) are the most commonly used polymers for bitumen modification. Plastomers provide several advantages and are commonly acknowledged to improve high-temperature stiffness, although some of them are more prone to phase separation and consequent storage instability. Nowadays, due to the recent push for recycling, many road authorities are looking at the use of recycled plastics in roads. Hence, some of the available plastomers—in pellet, flakes, or powder form—are coming from materials recycling facilities rather than chemical companies. This review article describes the details of using plastomers as bitumen modifiers—with a specific focus on recycled plastics—and how these can potentially be used to enhance bitumen performance and the road durability. Chemical modifiers for improving the compatibility between plastomers and bitumen are also addressed in this review. Plastomers, either individual or in combination of two or three polymers, are found to offer great stiffness at high temperature. Different polymers including HDPE, LDPE, LLDPE, MDPE, PP, PS, PET, EMA, and EVA have been successfully employed for bitumen modification. However, each of them has its own merit and demerit as thoroughly discussed in the paper. The recent push in using recycled materials in roads has brought new light to the use of virgin and recycled plastomers for bitumen modification as a low-cost and somehow environmental beneficial solution for roads and pavements.

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Section: Virgin and Waste (Recycled) Plastomers To Improve Bitumen Performancementioning

confidence: 99%

Sustainable Polymers from Recycled Waste Plastics and Their Virgin Counterparts as Bitumen Modifiers: A Comprehensive Review

2021

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“…Ethyl vinyl acetate (EVA) is a thermoplastic polymer (plastomer), which resembles the elastomers in terms of softness and flexibility [56], and which can be found in toys, home tools, and as flooring in various sports. EVA is obtained by copolymerization of ethylene (E) and vinyl acetate (VA) [57]. The content of vinyl acetate (VA) can be controlled through the process of copolymerization [58].…”

Section: Ethyl Vinyl Acetate (Eva)mentioning

confidence: 99%

“…The melting temperature of the EVA, shown in the literature reviewed, is between 54 and 110 • C [57,61,62]. In relation to the mixing process, there are large variations, with temperatures ranging between 150 and 190 • C, digestion times between 20 min and 4 h for the wet process, and mixing speeds that vary from 300 to 7200 rpm (Figure 3).…”

Section: Ethyl Vinyl Acetate (Eva)mentioning

confidence: 99%

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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“…Another factor which is considered the simplest factor for evaluating blended binder performance against temperature variation is the penetration index (PI). Where PI values for asphalt cement ranges between (-2 to +2), and binders with higher PI values (more positive) consider having lower susceptibly to temperature variations and resulted in favorable characteristics [33]. As shown in Fig.…”

Section: Physical Properties Of Modified Asphaltmentioning

confidence: 98%

Effect of SBR/Waste Ceramic Powder Nanocomposite on High Temperature Performance of Asphalt Binder

2021

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Modifying asphalt binder with styrene butadiene rubber (SBR) improves low temperature performance (resistance to cracking), elastic recovery, and ductility of binder. However, some of difficulties were found at high temperatures susceptibility (Rutting), and low storage stability (compatibility). Therefore, the aim of this study is to resolve these defects (rutting and compatibility) by formulating SBR/ waste nanoceramic powder (WNCP) nanocomposites. Three nanocomposites formulations are fabricated from SBR/WNCP with mass ratios (90:10), (80:20), and (70:30) respectively. The prepared nanocomposites are assessed by XRF, XRD, and DLS. Asphalt binder is modified by 5wt% from each fabricated nanocomposite. Physical tests of modified asphalt binder including softening point, penetration, and penetration index are measured. The high temperature performance; rutting factor (G*/sindelta) is studied with DSR before and after exposure to short term aging. The compatibility of modified binder was studied by conducting storage stability test. Results confirmed that fabrication of SBR/WNCP nanocomposite enhance the compatibility, storage stability, and stiffness of blended binder. Also, DSR results approved that the rutting resistance of binder is enhanced.

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Enhancing the performance of blown asphalt binder using waste EVA copolymer (WEVA)

Cited by 25 publications

References 18 publications

Sustainable Polymers from Recycled Waste Plastics and Their Virgin Counterparts as Bitumen Modifiers: A Comprehensive Review

Sustainable Polymers from Recycled Waste Plastics and Their Virgin Counterparts as Bitumen Modifiers: A Comprehensive Review

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

Effect of SBR/Waste Ceramic Powder Nanocomposite on High Temperature Performance of Asphalt Binder

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