Mechanical Behavior and Thermal Oxidative Aging of Anhydride-Cured Epoxy Asphalt with Different Asphalt Contents

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

doi:10.1061/(asce)mt.1943-5533.0004408

Cited by 16 publications

(21 citation statements)

References 21 publications

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“…Figure 3 shows the viscosity‐time curve of EA composites without and containing UV‐531 at 120°C. As previously studied, the viscosity of EA binder increased with time at high temperatures due to the curing reaction of the resin phase 4 . The viscosity of EA binders increased slowly at first and then rapidly due to the gel.…”

Section: Resultsmentioning

confidence: 52%

“…These molds were put into a sealed container at 120°C for curing (for 18 h). According to previous research, a sealed container can prevent asphalt binders from oxidizing during the curing period 4 …”

Section: Materials and Experimentalmentioning

confidence: 99%

“…The area of the main functional group was calculated using the integral area method. A summary of the main functional groups being analyzed in this research is listed in Table 2 4,45 …”

Section: Materials and Experimentalmentioning

confidence: 99%

“…Additionally, according to the type of curing agent, EA binder is divided into anhydride‐cured EA and amine‐cured EA. Due to non‐excessive curing, thermal resistance, and low cost, anhydride‐cured EA products are expected to be long‐lasting paving materials 4,5 . This type of EA binder is widely used in large‐span steel bridge decks, highway pavements, airport runway overlays, and railways.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of properties and aging resistance of epoxy asphalt composite modified by ultraviolet absorber

Wang

Min

Wong

et al. 2023

J of Applied Polymer Sci

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This research investigated the effect of ultraviolet absorber (UV‐531) on the properties of epoxy asphalt (EA) binders. EA binders were modified by adding UV‐531 absorber at contents of 0, 0.3, 0.6, 0.9, and 1.2 wt%, and composites were then subjected to ultraviolet (UV)‐based aging, including UV, oxygen, and heat treatment. Laboratory tests were conducted to assess UV absorption, viscosity, mechanical parameters, contact angle, microstructure, and chemical functional groups of absorber‐modified EA composites before and after aging. The results showed that the addition of UV‐531 resulted in enhanced UV absorption capacity, lower initial viscosity, and longer allowable application time for EA composites. The UV‐531 absorber has good compatibility with EA binders and does not weaken the performance of EA binders. From anti‐aging perspective, UV‐531 absorber effectively delayed the degradation of the physical, mechanical, and chemical structures of EA composites. The breakage of alkyl and ester groups of EA composites containing absorber was significantly reduced under aging conditions. Overall, the presence of UV‐531 retarded severe performance deterioration in EA composite. Considering aging improvement and economic cost, it is recommended to use a content of 0.9 wt% UV‐531 absorber as an anti‐aging agent for EA composites.

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Section: Resultsmentioning

confidence: 52%

Section: Materials and Experimentalmentioning

confidence: 99%

“…The area of the main functional group was calculated using the integral area method. A summary of the main functional groups being analyzed in this research is listed in Table 2 4,45 …”

Section: Materials and Experimentalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of properties and aging resistance of epoxy asphalt composite modified by ultraviolet absorber

Wang

Min

Wong

et al. 2023

J of Applied Polymer Sci

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“…Despite the many benefits of epoxy resins and adhesives formed on their basis, one of their disadvantages is a certain sensitivity to operating conditions, precisely elevated temperatures [ 70 , 71 , 72 , 73 , 74 , 75 ], elevated pressures [ 76 ] and other interdependent factors, such as chemical agents typical of aerospace operations: water, jet fuel, hydraulic fluid and fuel additive [ 77 , 78 ]. The problem of the thermal degradation of epoxy adhesives has particularly been given much attention.…”

Section: Discussionmentioning

confidence: 99%

Adhesive Joint Degradation Due to Hardener-to-Epoxy Ratio Inaccuracy under Varying Curing and Thermal Operating Conditions

et al. 2022

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This paper presents the results of an experimental study of adhesive joint strength with consideration of the inaccuracy of the hardener dosage, in the context of evaluating the degradation of joints when used either at ambient or elevated temperatures. The butt joint strength characteristics were assessed for two types of adhesives—rigid and flexible—and two curing scenarios—with and without heat curing. An excess hardener was shown to be significantly more unfavourable than its deficiency, which can ultimately be considered as a recommendation for forming epoxy adhesive joint assemblies. In order to fully understand the relationship between the analysed mechanical properties of the material and the influence of component ratio excesses and heating, a process of fitting basic mathematical models to the obtained experimental data was also performed.

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Research on the thermal oxygen aging mechanism of the composite curing system epoxy asphalt with different curing agent proportions on the molecular scale

Min

Shi

et al. 2023

J of Applied Polymer Sci

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To study the influence of the cross‐linking network on the thermal oxygen aging performance of the epoxy asphalt, the laser copolymerization microscopy, Fourier transform infrared spectroscopy and element analysis tests were used to characterize the changes in chemical components of epoxy asphalt with composite curing system during thermal oxygen aging. According to the changes in chemical components, the epoxy asphalt molecular models were constructed. The diffusion behavior of oxygen atoms was analyzed, the aging degree was determined. Moreover, the Tg and radial distribution function were calculated to determine the effect of aging on the low‐temperature performance and component distribution of epoxy asphalt. The results show that a proper proportion of curing agent helped to uniform distribution of the asphalt phase. The rise in anhydride curing agent content increased the density of crosslinking network, limited the diffusion of oxygen atoms, and contributed to the resistance of epoxy asphalt chemical components to thermal oxygen aging. However, the high proportion of anhydride aggravated the oxidation reaction of the asphalt phase due to the uneven coating of the asphalt phase. After thermal oxygen aging, the distribution of asphaltene and epoxy resin phase showed a concomitant phenomenon due to polarity adsorption.

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Mechanical Behavior and Thermal Oxidative Aging of Anhydride-Cured Epoxy Asphalt with Different Asphalt Contents

Cited by 16 publications

References 21 publications

Evaluation of properties and aging resistance of epoxy asphalt composite modified by ultraviolet absorber

Evaluation of properties and aging resistance of epoxy asphalt composite modified by ultraviolet absorber

Adhesive Joint Degradation Due to Hardener-to-Epoxy Ratio Inaccuracy under Varying Curing and Thermal Operating Conditions

Research on the thermal oxygen aging mechanism of the composite curing system epoxy asphalt with different curing agent proportions on the molecular scale

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