Preliminary examination of chipseals prepared with epoxy-modified bitumen

Bagshaw, Stephen A.; Herrington, P R; Wu, Jeremy

doi:10.1016/j.conbuildmat.2015.04.003

Cited by 12 publications

(9 citation statements)

References 10 publications

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“…EA with 5% of accelerator has significantly higher G * than that with 2% of accelerator [102]. Mixing temperature has little effect on G * up to 5 hours after which higher mixing temperature yields higher G * [102]. For FEA, G ′ and G ″ were lower than that of nonfoamed EA, which also decrease with the increase of water content [27].…”

Section: Dynamic Viscoelasticitymentioning

confidence: 88%

“…e value of G * for PDL epoxy increased continuously with ER content, and it has comparable G * value as DER332 EA [31]. EA with 5% of accelerator has significantly higher G * than that with 2% of accelerator [102]. Mixing temperature has little effect on G * up to 5 hours after which higher mixing temperature yields higher G * [102].…”

Section: Dynamic Viscoelasticitymentioning

confidence: 88%

“…To reduce or eliminate problems related to chip seal, like chip loss, flushing, and cracking, the performance of epoxymodified asphalt chip seal was comprehensively investigated by Bagshaw et al [102]. To ensure safety and prolong service life of railway bridges, EAM was used as the waterproof protective layer to mitigate water damage to bridge deck [103].…”

Section: Epoxy Asphalt Mixturementioning

confidence: 99%

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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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Section: Dynamic Viscoelasticitymentioning

confidence: 88%

Section: Dynamic Viscoelasticitymentioning

confidence: 88%

Section: Epoxy Asphalt Mixturementioning

confidence: 99%

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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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“…On these grounds, although some experiences using epoxy modifiers were reported in the 1950/1960s [1,18], the modification technology with epoxies has recently attracted the attention of pavement scientists and technicians. Some papers [11,[19][20][21] have reported that the addition of epoxy compounds to bitumen produces chemical crosslinking during their mixing stage, the extent of which strongly depends on the processing conditions (i.e., time and temperature) [19][20][21] and leads to thermoset bituminous binders with enhanced performance to rutting phenomena [11]. It can thus be stated that an adequate selection of the processing conditions (i.e., time and temperature) should enable epoxy-asphalt mix to be handled and compacted in a partially cured state.…”

Section: Introductionmentioning

confidence: 99%

Short- and Long-Term Epoxy Modification of Bitumen: Modification Kinetics, Rheological Properties, and Microstructure

Cuadri¹,

Delgado-Sánchez²,

Navarro³

et al. 2020

Polymers

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Aiming to gain knowledge in the epoxy-bitumen modification mechanisms, this work explores the effects that epoxy concentration and ambient curing exert on the physico-chemistry and thermo-rheological properties of epoxy-modified binders. Process rheokinetics of epoxy-bitumen blends indicates that binder short-term modification (i.e., during processing) is accelerated by epoxy concentration. Furthermore, a synergistic effect of epoxy concentration and ambient curing is found during long-term modification (i.e., during curing at ambient conditions). As a result, viscous and viscoelastic rheological properties of binders are enhanced at medium/high in-service temperatures, at least, after one month of curing. FTIR (Fourier Transform Infrared spectroscopy) tests and SARAs (Saturates, Aromatics, Resins and Asphaltenes) analysis confirm the existence of esterification/etherification reactions between epoxy oxirane groups and the carbonyl groups available in aromatic and resin molecules. Thus, the new high molecular weight compounds increase the asphaltenic fraction of modified bitumen. Likewise, nonreversing heat flow curves obtained by modulated calorimetry corroborate the formation of such highly structured domains responsible for the final binder performance.

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“…Due to good adhesion, the epoxy-modified asphalt has the potential benefit of extending the service life of chip seals and other micro-surfacing. Epoxy asphalt bond coat binder has also been studied for chip seal application in New Zealand, and the results showed that although strong aggregate to aggregate bonding can be achieved, the initial viscosity and curing rate is currently too slow for chip seal applications (Bagshaw, Herrington and Wu, 2015). In order to meet the Chip Seal Best Practices requirement that road should be opened for traffic in about 3 to 4 hours after construction, epoxy chemical accelerators should be added into the binder for accelerated curing (Transportation Research Board, 2005).…”

Section: Introductionmentioning

confidence: 99%

Performance Characteristics of Diluted Epoxy Asphalt Binders and Their Potential Application in Chip Seal

Yao

Chen

Loh

2019

J. Mater. Civ. Eng.

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Epoxy asphalt is a thermosetting paving material that can provide higher strength, stiffness, adhesion, high-temperature stability, and service life comparing to conventional asphalt. However, it has not been widely used on highway pavements, primarily due to the higher initial cost and limited operational window.In this paper, dilution of epoxy asphalt with SBS-modified asphalt was studied for the potential use for chip seal application. Performances such as workability, hardening process, uncured and fully-cured bond strength, fully-cured binder performance in both high and low temperatures were also investigated thoroughly. It was found that the diluted epoxy asphalt has higher initial adhesion feature and help provide a quicker opening to traffic after construction than the undiluted epoxy asphalt. Meanwhile, epoxy asphalt in the blend can enhance the final adhesive strengths to retain the chips under strain induced by vehicles in the long-term. The dilution level in 1:0.5 and 1:1 ratios showed a faster polymerization/curing rate than the 1:2 and 1:3 ratios.The diluted epoxy asphalt shows improved low-temperature performance compared to pure epoxy asphalt and better high-temperature performance compared to pure SBS-modified asphalt. Overall, this paper presents dilution of epoxy asphalt with SBS-modified asphalt could have significant practical benefits, and the 1:1 dilution ratio seems to be the most suitable one from the aspects of performance, cost and practical use.

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Preliminary examination of chipseals prepared with epoxy-modified bitumen

Cited by 12 publications

References 10 publications

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

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

Short- and Long-Term Epoxy Modification of Bitumen: Modification Kinetics, Rheological Properties, and Microstructure

Performance Characteristics of Diluted Epoxy Asphalt Binders and Their Potential Application in Chip Seal

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