Chemical and physical properties of hot mixing epoxy asphalt binders

Cong, Peiliang; Luo, Wei; Xu, Peijun; Zhang, Yihan

doi:10.1016/j.conbuildmat.2018.11.275

Cited by 78 publications

(31 citation statements)

References 31 publications

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“…The results of a tensile test showed that the tensile strength increased slowly in the initial stage of curing and then increased rapidly, whereas the elongation at break decreased as the curing time increased. Cong et al [21] used FTIR to investigate the curing process of epoxy asphalt and developed a curing reaction model that was in good agreement with experimental data. Tensile test results showed that as the curing time increased, the tensile strength increased and the elongation decreased.…”

Section: Introductionmentioning

confidence: 88%

“…The reaction between the epoxy resin and the curing agent increases the cohesion of epoxy asphalt via the formation of a crosslinked network. It has been shown that the formation of a crosslinked epoxy asphalt network can reduce the elongation at break of epoxy asphalt [21]. The test results show that the elongation at break of epoxy asphalt decreased rapidly in the early curing stage.…”

Section: Mechanical Properties Of Epoxy Asphalt During the Curing Promentioning

confidence: 99%

“…The curing of epoxy asphalt was analyzed by using FTIR spectroscopy to track the change in the characteristic peak (915 cm −1 ) of the epoxy group in epoxy asphalt at 60 • C with changes in the curing time [21]. FTIR tests were carried out on epoxy asphalt samples with different curing times.…”

Section: Quantitative Analysis Of the Curing Process Using Ftirmentioning

confidence: 99%

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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: Introductionmentioning

confidence: 88%

Section: Mechanical Properties Of Epoxy Asphalt During the Curing Promentioning

confidence: 99%

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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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“…HEB is usually made from epoxy resin, bitumen, curing agent, and some additives. In the study of Cong et al [24], the HEB samples were prepared by heating modified bitumen above 160°C. Subsequently, the epoxy resin was added into the flowable bitumen, and meanwhile, the high shear mixer was utilized to disperse the epoxy resin in the bitumen.…”

Section: Introductionmentioning

confidence: 99%

Influence of preparation methods on the performance of cold-mixed epoxy bitumen

et al. 2021

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Cold-mixed epoxy bitumen (CEB) has been presented as an eco-friendly paving material used for steel bridge deck pavements. This study performed an investigation on three preparation methods of CEBs, which includes one kind of three-component and two kinds of two-component methods. The curing process was characterized through the viscosity measurement. Meanwhile, the microstructure of CEBs was observed using fluorescence microscopy. Mechanical properties of CEBs prepared with different methods were characterized by employing direct tensile tests and dynamic mechanical analysis (DMA). Finally, thermogravimetric analysis (TGA/DTG) was conducted to feature the thermal stability of CEBs. The results indicated that the preparation methods significantly affected the performance of cured CEBs, although the same mix design was adopted. The curing temperature determined the curing rate of CEBs, while the preparation methods dominated the morphological characteristic of cured CEBs. The three-component preparation method can achieve acceptable mechanical performance for engineering requirements. As for two-component methods, the curing agent is supposed to be mixed with bitumen to obtain satisfying microstructures of CEBs.

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“…Epoxy asphalt concrete (EAC) is composed of asphalt, epoxy resin, a curing agent, and aggregates, and is characterized by good waterproofing performance, rutting resistance, high strength, and fatigue resistance. EAC is widely used in orthotropic steel bridge deck pavement engineering [1,2]. The steel plates of a steel bridge exhibit larger deformation under traffic loading than a concrete bridge deck or ordinary pavement.…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of the Influence of Aggregate Strength on the Flexural Cracking Behavior of Epoxy Asphalt Mixtures

Wei

et al. 2020

Materials

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The flexural cracking resistance of an asphalt concrete mixture used in a steel bridge deck pavement needs to be higher than that of one used in ordinary pavement. In this study, mechanical experimental tests were used to evaluate the influence of the aggregate strength on the flexural cracking behavior of epoxy asphalt concrete (EAC). The aggregate fracture area of beam cross sections was quantitatively analyzed by digital image processing, and crack propagation in the mixture was analyzed using fracture mechanics theory. The bending test results showed that the EAC containing high-strength aggregates exhibited the highest flexural cracking resistance among all of the aggregate mixtures under the same conditions. The use of high-strength aggregates led to a reduction in the aggregate fracture area, thereby improving the flexural cracking resistance of the mixture. The aggregate strength had a significant influence on the flexural cracking propagation behavior of the mixture. Fatigue test results at strain-controlled levels of 600–1200 με and 15 °C showed that the aggregate strength had no evident influence on the fatigue properties of the EAC. It is recommended that high-strength aggregates are used to increase the fracture resistance of aggregates and the flexural crack resistance of EACs.

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Chemical and physical properties of hot mixing epoxy asphalt binders

Cited by 78 publications

References 31 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

Influence of preparation methods on the performance of cold-mixed epoxy bitumen

Experimental Evaluation of the Influence of Aggregate Strength on the Flexural Cracking Behavior of Epoxy Asphalt Mixtures

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