Ethylene vinyl acetate copolymer modified epoxy asphalt binders: Phase separation evolution and mechanical properties

Ya, Liu; Zhang, Jing; Chen, Ru; Cai, Jun; Xi, Zhonghua; Xie, Hongfeng

doi:10.1016/j.conbuildmat.2017.01.081

Cited by 91 publications

(39 citation statements)

References 27 publications

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“…The particles were evenly dispersed in the epoxy resin, forming a stable two-phase 3D network structure. This result is consistent with that observed by Liu et al [26], that is, the diameter of asphalt particles first increases and then decreases during the epoxy asphalt curing process.…”

Section: Morphological Analysissupporting

confidence: 93%

“…Sci. 2020, 10, x FOR PEER REVIEW 10 of 15 consistent with that observed by Liu et al [26], that is, the diameter of asphalt particles first increases and then decreases during the epoxy asphalt curing process. Two definitions are introduced to quantify the dispersion of asphalt particles in the epoxy resin crosslinked network: homogeneity (also known as overall uniformity) and dispersion.…”

Section: Morphological Analysissupporting

confidence: 86%

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Experimental Study on the Micromorphology and Strength Formation Mechanism of Epoxy Asphalt During the Curing Reaction

Xu¹,

Zhuang²,

Chen³

et al. 2020

Applied Sciences

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The micromorphological changes and the strength formation mechanism of the curing of epoxy asphalt, which is mostly used for steel bridge deck pavements, were investigated. A tensile test was used to analyze the mechanical properties of epoxy asphalt, and Fourier transform infrared spectroscopy (FTIR) was used to determine the change in the epoxy peak area. Laser scanning confocal microscopy (LSCM) and scanning electron microscopy (SEM) were used to observe two-dimensional and three-dimensional micromorphological changes, respectively, during the curing reaction of epoxy asphalt. The results of the tensile and FTIR tests on epoxy asphalt showed that the tensile strength and epoxy conversion rate both increased with the curing time and exhibited similar trends, indicating that the network formed by the crosslinking and polymerization of epoxy groups causes the increased strength of epoxy asphalt. The curing degree of epoxy asphalt during the curing reaction can be indirectly evaluated from the conversion rate of epoxy groups. The asphalt tended to evenly be dispersed in the continuous phase of the epoxy resin during the formation of the epoxy resin network, and the network structure increased the deformation of the epoxy resin. The epoxy asphalt curing reaction process was classified into three stages based on the degree of curing.

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Section: Morphological Analysissupporting

confidence: 93%

Section: Morphological Analysissupporting

confidence: 86%

Experimental Study on the Micromorphology and Strength Formation Mechanism of Epoxy Asphalt During the Curing Reaction

Xu¹,

Zhuang²,

Chen³

et al. 2020

Applied Sciences

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“…The addition of EVA also produces an increment in the viscosity of the RPMB [59,63,64]. However, in contrast with what occurs with the addition of PE, PP, and PVC, the ductility also increases.…”

Section: Ethyl Vinyl Acetate (Eva)mentioning

confidence: 92%

“…The percentage of EVA added ranges from 1% to 8% by weight of binder, with the most common being 5% (Figure 2). There are also variations in the amount of vinyl acetate (VA) included in the EVA, the most commonly used percentage being 18% [60,63,64].…”

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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“…The tensile properties of the neat epoxy and EAAs are depicted in Figure . The tensile strength and elongation at break of the neat epoxy were 10.44 MPa and 512%, respectively; these were much higher than those of the EA binder . Evidently, the addition of the base asphalt decreased both the tensile strength and elongation at break of the neat epoxy.…”

Section: Resultsmentioning

confidence: 85%

Viscous, damping, and mechanical properties of epoxy asphalt adhesives containing different penetration‐grade asphalts

Sun

Gong

Liu

et al. 2018

J of Applied Polymer Sci

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Epoxy asphalt adhesive (EAA) is a thermosetting polymer modified asphalt that has been widely applied on steel bridge decks as a strong adhesive and waterproof layers. In this study, the influence of the asphalt penetration grade on the viscosity, damping and mechanical properties, bond strength, and microstructures of EAAs was investigated. The viscosity of the EAAs increased with increasing asphalt penetration grade. The presence of base asphalt increased the glass-transition temperature (T g ) of the neat epoxy. The asphalt penetration grade had a negligible effect on the T g values of the EAAs. The existence of base asphalt improved the damping behaviors of the neat epoxy. Moreover, the damping properties of the EAAs increased with increasing asphalt penetration grade. The tensile strength, elongation at break, and bond strength values of the EAAs increased with increasing asphalt penetration grade. The bond strengths of the EAAs were 7-to 10-fold higher than that of the neat asphalt. The asphalt penetration grade had a negligible effect on the bond strengths of the EAAs. Morphological observations revealed that the average size of the dispersed asphalt particles in the epoxy decreased with increasing asphalt penetration grade. A more homogeneous phase separation was formed in the EAA with a higher penetration-grade asphalt.

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Ethylene vinyl acetate copolymer modified epoxy asphalt binders: Phase separation evolution and mechanical properties

Cited by 91 publications

References 27 publications

Experimental Study on the Micromorphology and Strength Formation Mechanism of Epoxy Asphalt During the Curing Reaction

Experimental Study on the Micromorphology and Strength Formation Mechanism of Epoxy Asphalt During the Curing Reaction

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

Viscous, damping, and mechanical properties of epoxy asphalt adhesives containing different penetration‐grade asphalts

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