Influence of curing agent ratio, asphalt content and crosslinking degree on the compatibility and component distribution of epoxy asphalt in compound curing agent system

Li, Mingyue; Min, Zhaohui; Wang, Qichang; Huang, Wei; Shi, Zhiyong

doi:10.1080/10298436.2022.2136375

Cited by 6 publications

(5 citation statements)

References 53 publications

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“…As an abbreviation denoting epoxy-modified asphalt, epoxy asphalt was initially developed for the pavement of airfields in the late 1950s [ 25 ]. Due to the presence of crosslinked epoxy networks, epoxy asphalt shows good adhesion, high strength and excellent water and solvent resistance compared to conventional thermoplastic asphalts [ 26 , 27 , 28 , 29 ]. Since 1967, epoxy asphalt has been applied extensively as both the bond coat and binder in the pavement of long-span OSD bridges [ 30 , 31 , 32 , 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Bonding and Mechanical Performance of Epoxy Asphalt Bond Coats with Graphene Nanoplatelets

et al. 2023

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Improving bonding and mechanical strengths is important for the application of bond coats used in the construction of steel deck bridges. Graphene nanoplatelets (GNPs) are attractive nanofillers for polymer modification because of their low cost, ultra-high aspect ratio, and extraordinary thermal and mechanical performance. In this paper, GNPs were used to reinforce the epoxy asphalt bond coat (EABC). The morphology, viscosity–time behavior, contact angle, dynamic mechanical properties, and mechanical and bonding strengths of GNP-reinforced EABCs were investigated using laser confocal microscopy, a Brookfield rotational viscometer, a contact angle meter, dynamic mechanical analysis, a universal test machine, and single-lap shear and pull-off adhesion tests. GNP dispersed non-uniformly in the asphalt phase of EABC. The viscosity of the neat EABC was lowered with the inclusion of GNPs and thus the allowable construction time was extended. The existence of GNPs enhances the hydrophobicity of the neat EABC. When adding more than 0.2% GNP, the storage modulus, crosslinking density and glass transition temperatures of both asphalt and epoxy of the neat EABC increased. The mechanical and bonding properties of the neat EABC were greatly enhanced with the incorporation of GNPs. Furthermore, the mechanical and bonding strengths of the modified EABCs increased with the GNP content. GNP-reinforced EABCs can be utilized in the pavement of long-span steel bridges with long durability.

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Section: Introductionmentioning

confidence: 99%

Enhancement of Bonding and Mechanical Performance of Epoxy Asphalt Bond Coats with Graphene Nanoplatelets

et al. 2023

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“…Therefore, based on the ratios in the references and early exploratory experimental results, three curing agent ratios of 20:1, 6:1, and 2:1 were selected, considering the differences in data. 24,25 F I G U R E 1 Scheme for this research. EA, epoxy asphalt; UV, ultraviolet.…”

Section: Molecular Model Of Virgin Eamentioning

confidence: 99%

“…The construction and validation of the virgin EA model was described in the author's previous research at length. 24,25…”

Section: Molecular Model Of Virgin Eamentioning

confidence: 99%

“…Similar findings were reported for the curing behavior of EA with different composite curing agent ratios. 25 The asphalt phase of EA after photooxidation aging was also distributed in the cross-linked network constructed by epoxy resin. After photooxidation aging, the aggregation phenomenon of epoxy resin and asphalt phase in 2-EA-UV with high anhydride content was alleviated.…”

Section: Phase Distributionmentioning

confidence: 99%

“…The distribution, compatibility, and glass transition temperature of EA components were calculated based on the crosslinking model and aging model of EA. 24,25 It is worth noting that the amorphous model was used to represent EA in previous studies. Similarly, Zhou et al, Gao et al, and Yu et al analyzed the curing process and thermodynamic behavior of EA based on an amorphous model.…”

Section: Introductionmentioning

confidence: 99%

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The effect of photooxidation aging on the cohesion and interfacial adhesion behavior of epoxy asphalt with a composite acidic curing system based on molecular simulation

Min,

Li,

Chen

et al. 2024

J of Applied Polymer Sci

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This paper investigated the cross‐linking network structure of epoxy asphalt (EA) with the different ratio of composite curing agents, and further determined the effect of photooxidation aging on the tensile and interfacial adhesion behavior of EA with different cross‐linking network structures through molecular simulation. Based on the molecular models of EA and the interface model between EA and aggregate, the crosslinking network structural characteristics and tensile mechanical behavior were determined. The interfacial adhesion behavior and the mechanization were further studied. The results indicate that 20‐EA and 6‐EA have an epoxy resin cross‐linked network with uniform pore structure and phase distribution. 2‐EA showed a denser cross‐linking network and uneven aggregation phenomenon. Photooxidative aging alleviated the aggregation phenomenon. A dense cross‐linking network improved the tensile strength and the ability of tensile performance to resist photooxidation aging. The interface of EA‐quartz exhibited higher adhesion strength than EA‐calcite due to the closer distance and stronger nonbonding interactions between EA and quartz. The low anhydride content and photooxidation aging made EA approach to the aggregate interface, increasing nonbonding interaction and interfacial adhesion strength. In addition, quartz aggregates were more suitable for application in EA mixtures due to the higher interfacial adhesion strength and lower water sensitivity.

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Synergistic effects of epoxy polymer and rejuvenator in asphalt rejuvenation: A comprehensive performance analysis

Xu,

Hao,

Yao

et al. 2024

Construction and Building Materials

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Influence of curing agent ratio, asphalt content and crosslinking degree on the compatibility and component distribution of epoxy asphalt in compound curing agent system

Cited by 6 publications

References 53 publications

Enhancement of Bonding and Mechanical Performance of Epoxy Asphalt Bond Coats with Graphene Nanoplatelets

Enhancement of Bonding and Mechanical Performance of Epoxy Asphalt Bond Coats with Graphene Nanoplatelets

The effect of photooxidation aging on the cohesion and interfacial adhesion behavior of epoxy asphalt with a composite acidic curing system based on molecular simulation

Synergistic effects of epoxy polymer and rejuvenator in asphalt rejuvenation: A comprehensive performance analysis

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