Toughening epoxy asphalt binder using core-shell rubber nanoparticles

Su, Wufeng; Han, Xiaocheng; Gong, Jie; Xi, Zhonghua; Zhang, Junsheng; Wang, Qingjun; Xie, Hongfeng

doi:10.1016/j.conbuildmat.2020.119716

Cited by 45 publications

(11 citation statements)

References 48 publications

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“…Tensile toughness, the area under the stress–strain curve, indicates the energy absorption up to the material’s failure [ 53 , 54 , 55 ]. The tensile toughness of the original and recycled epoxy vitrimers is shown in Figure 14 .…”

Section: Resultsmentioning

confidence: 99%

Influence of the Epoxy/Acid Stoichiometry on the Cure Behavior and Mechanical Properties of Epoxy Vitrimers

Fan

Zhao

et al. 2022

Molecules

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Bisphenol A epoxy resin cured with a mixture of dimerized and trimerized fatty acids is the first epoxy vitrimer and has been extensively studied. However, the cure behavior and thermal and mechanical properties of this epoxy vitrimer depend on the epoxy/acid stoichiometry. To address these issues, epoxy vitrimers with three epoxy/acid stoichiometries (9:11, 1:1 and 11:9) were prepared and recycled four times. Differential scanning calorimetry (DSC) was used to study the cure behavior of the original epoxy vitrimers. The dynamic mechanical properties and mechanical performance of the original and recycled epoxy vitrimers were investigated by using dynamic mechanical analysis (DMA) and a universal testing machine. Furthermore, the reaction mechanism of epoxy vitrimer with different epoxy/acid stoichiometry was interpreted. With an increase in the epoxy/acid ratio, the reaction rate, swelling ratio, glass transition temperature and mechanical properties of the original epoxy vitrimers decreased, whereas the gel content increased. The recycling decreased the swelling ratio and elongation at break of the original epoxy vitrimers. Moreover, the elongation at break of the recycled epoxy vitrimers decreased with the epoxy/acid ratio at the same recycling time. However, the gel content, tensile strength and toughness of the original epoxy vitrimers increased after the recycling. The mechanical properties of epoxy vitrimers can be tuned with the variation in the epoxy/acid stoichiometry.

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Section: Resultsmentioning

confidence: 99%

Influence of the Epoxy/Acid Stoichiometry on the Cure Behavior and Mechanical Properties of Epoxy Vitrimers

Fan

Zhao

et al. 2022

Molecules

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“…e lower tensile strength for EA after addition of crumb rubber was again attributed to the poor distribution of continuous phaseseparated structure of asphalt rubber within the epoxy matrix [81]. With the addition of core-shell rubber, 29% increment in tensile strength, 60% increase in elongation at break, and double toughness were reported for EA [108]. As compared with conventional EA, its elongation was increased by 198% while toughness was increased by 65% for EA with 2 wt.% SBS at 31% epoxidation degree [128].…”

Section: Tensile Performancementioning

confidence: 97%

“…e evolution of the phase-separated microstructure for EA during curing process is illustrated in Figure 7. Polydispersity index results indicated poor asphalt dispersion at the beginning followed by constant dispersion [108]. For EA, phase separation was often attributed to nucleation and growth mechanism [109].…”

Section: Laser Scanning Confocal Microscope (Lscm) and Fluorescence Microscopy (Fm)mentioning

confidence: 99%

Application of Epoxy‐Asphalt Composite in Asphalt Paving Industry: A Review with Emphasis on Physicochemical Properties and Pavement Performances

Chen

Hossiney

Yang

et al. 2021

Advances in Materials Science and Engineering

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One of the failure mechanisms associated with asphalt paving layers, especially on steel deck bridges, is large permanent deformation, which adversely affects its long-term performance in service. Thus, epoxy resin was introduced in asphalt paving industry to tackle permanent deformation of asphalt mixtures due to its thermosetting nature. In this review, epoxy resin as a dominant component of the epoxy-asphalt composite system was first considered, followed by a discussion on its curing methods and curing mechanism. Furthermore, the physicochemical property and mechanical performance of epoxy asphalt and epoxy asphalt mixture were thoroughly examined. Crosslink density of epoxy asphalt dictates its viscosity and thus the allowable construction time. Phase separation and dispersion of asphalt particles in the epoxy matrix was observed for epoxy-asphalt composite, and it showed superior elastic behavior and deformation resistance capability when compared with conventional asphalt materials. Furthermore, epoxy asphalt mixture exhibited significantly higher compressive strength, much better rutting resistance, and superior durability and water resistance properties. However, its low-temperature cracking resistance was slightly compromised.

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“…The epoxy asphalt binder and EABC used in bituminous surfacing have been extensively used in many long-span bridges in China and the United States [ 10 , 11 , 12 , 13 , 14 ]. Epoxy asphalt is mainly composed of asphalt and epoxy resin, whose major components are epoxy oligomers and a curing agent [ 15 , 16 , 17 , 18 , 19 ]. In EABCs, except for the component of epoxy oligomers, curing agents, asphalt and other additives are premixed as another individual component.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide-Modified Epoxy Asphalt Bond Coats with Enhanced Bonding Properties

et al. 2022

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The bonding strength of the bond coat plays an important role in the composite action between the wearing surface and the deck plate of the orthotropic steel deck system. Poor bonding results in the delamination of the wearing surface from the deck plate. Graphene oxide (GO) possesses outstanding mechanical and thermal properties, as well as impressive multifunctional groups, which makes it an ideal reinforcement candidate for polymer matrices. In this study, graphene oxide was used to improve the bonding strength and toughness of the epoxy asphalt bond coat (EABC). The dispersion, hydrophobicity, viscosity–time behavior, phase-separated morphology, dynamic mechanical properties, pull-off strength, shear strength and mechanical performance of GO-modified EABCs were investigated using various techniques. The inclusion of GO improved the hydrophobicity of the unmodified EABC. The viscosity of the unmodified EABC was lowered with the addition of GO during curing. Moreover, the allowable construction time for the modified EABCs was extended with the GO loading. The incorporation of GO enhanced the stiffness of the unmodified EABC in the glassy and rubbery states. However, graphene oxide lowered the glass transition temperature of the asphalt of the unmodified EABC. Confocal microscopy observations revealed that GO was invisible in both the asphalt and epoxy phases of the EABC. The inclusion of GO improved the bonding strength, particularly at 60 °C, and mechanical properties of the unmodified EABC.

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Toughening epoxy asphalt binder using core-shell rubber nanoparticles

Cited by 45 publications

References 48 publications

Influence of the Epoxy/Acid Stoichiometry on the Cure Behavior and Mechanical Properties of Epoxy Vitrimers

Influence of the Epoxy/Acid Stoichiometry on the Cure Behavior and Mechanical Properties of Epoxy Vitrimers

Application of Epoxy‐Asphalt Composite in Asphalt Paving Industry: A Review with Emphasis on Physicochemical Properties and Pavement Performances

Graphene Oxide-Modified Epoxy Asphalt Bond Coats with Enhanced Bonding Properties

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