A study on the rheological properties and modification mechanism of graphene oxide/polyurethane/SBS-modified asphalt

Li, Shuai; Xu, Wenyuan; Zhang, Fengfa; He, Weijun

doi:10.1371/journal.pone.0262467

Cited by 10 publications

(4 citation statements)

References 12 publications

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“…The larger the values of G*, the greater the stiffness of asphalt, the better its high-temperature stability and the stronger its ability to resist flow deformation. The larger the value of G*/sin δ, the better the rutting resistance of RPP/SBS composite-modified asphalt at high temperatures [ 32 ]. Based on the statistics of the temperature scanning results of modified asphalt at 64–82 °C ( Table 4 ), the high-temperature performance of asphalt is analyzed by plotting Figure 10 and Figure 11 and Table 4 and Table 5 with temperature and RPP content as the independent variables.…”

Section: Resultsmentioning

confidence: 99%

Selecting the Best Performing Modified Asphalt Based on Rheological Properties and Microscopic Analysis of RPP/SBS Modified Asphalt

Zhang²,

Ji³

et al. 2022

Materials

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As an asphalt modifier, waste polypropylene (RPP) can not only optimize the performance of asphalt but also greatly alleviate the problem of waste plastic treatment, effectively reducing environmental pollution and resource waste. In order to evaluate the influence of RPP and styrene butadiene styrene (SBS) on asphalt performance, the application of RPP in modified asphalt pavement has been expanded. In this study, a dynamic shear rheometer (DSR), bending beam rheometer (BBR) and other instruments were used to evaluate the rheological properties of composite-modified asphalt. Fourier infrared spectroscopy (FTIR) and fluorescence microscopy (FM) was employed to conduct a microscopic analysis of the modified asphalt, and the layer analysis method was adopted to determine the optimal RPP content. The test results show that the rheological properties of asphalt are significantly improved by the composite modification of RPP and SBS. In addition, the cross-linking between polymer and asphalt is further enhanced by the composite addition of RPP and SBS. The comprehensive performance of modified asphalt is optimized at the RPP content of 2%, which is suitable for applications in the cold temperate zone. The RPP/SBS composite-modified asphalt is able to improve the utilization rate of RPP and has good environmental and economic benefits, thus exhibiting excellent comprehensive performance. However, the optimal asphalt content in the mixture was not investigated, and the economic benefits brought by the utilization of RPP were not evaluated and require further study.

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Section: Resultsmentioning

confidence: 99%

Selecting the Best Performing Modified Asphalt Based on Rheological Properties and Microscopic Analysis of RPP/SBS Modified Asphalt

Zhang²,

Ji³

et al. 2022

Materials

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“…The spectral range of FTIR was 500 cm -1 -4000cm -1 , the scanning frequency was 20 times/min, and the resolution was 4 cm -1 [31, 32]. The magnification (Mag) of SEM images tested at 5 kV voltage is 50.00 KX [33].…”

Section: Preparation and Test Methodsmentioning

confidence: 99%

Effect of epoxy value on the rheological properties and microcosmic mechanism of WER emulsified asphalt

Huang,

Shi,

Ouyang

2024

PLoS ONE

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Waterborne epoxy resin (WER), a cleaning material with exceptional high-temperature resistance, has attracted much attention to modify emulsified asphalt in the pavement material field. Epoxy value is the critical characteristic index of WER. In this research, three WER with the epoxy values of 0.20 eq/100g, 0.44 eq/100g, and 0.51 eq/100g were utilized as asphalt modifiers. The influence of epoxy value on WER-EA was investigated by comparing the rheological properties of three kinds of WER emulsified asphalt (WER-EA). The modification mechanism of WER-EA has been analyzed using FTIR and SEM. The results demonstrate that different WER-EA resulted in significantly different rheological properties. WER-EA with the epoxy value of 0.20 eq/100g (E20) performed best at high temperatures, with a maximum increase of 17477% in G*/sinδ compared to the neat asphalt and a maximum increase of 66.3% in G*/sinδ compared to the other two WER-EA. WER-EA with 0.44 eq/100g epoxy value (E44) performed best at low temperatures, with a maximum increase in m value of 39.4% and a maximum decrease in S value of 33.3% compared to the other two WER-EA. In addition, the interpenetrating polymer network (IPN) in E20 was observed to be more solid and stable, and IPN in E44 was more uniform. To summarize, lower epoxy value led to a higher degree of WER reaction and higher content of rigid groups, which is more conducive to optimizing the high-temperature property of WER-EA. WER with moderate epoxy value resulted in a low content of polar bonds and thus high content of flexible segments, which helps emulsified asphalt to form a more uniform IPN.

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“…Currently, there are more studies on oil substances as compatibilizers, such as furfural extraction oil, aromatic oil, shale oil, etc. However, the addition of oil substances will reduce the consistency of matrix asphalt, which ultimately affects the rutting resistance of SBS-modified asphalt [9][10][11]. Petroleum resin with nine carbon atoms (C 9 petroleum resin), as a malleable hydrocarbon resin made by polymerization of petroleum cracking products, has some double bonds and aromatic rings in its structure, which makes it compatible with other resins, rubbers, SBS and matrix bitumen [12].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the effect of Coumarone resin on the performance of SBS-modified asphalt

Feng,

Hu,

Sun

et al. 2024

PLoS ONE

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An inexpensive and high-performing solid Coumarone resin was added to Styrene-butadiene-styrene (SBS) copolymer-modified asphalt to enhance its storage stability and road performance. To assess the effect of Coumarone resin dosage on the SBS-modified asphalt, a series of laboratory tests were conducted. The composite modified asphalt’s segregation test was used to evaluate its storage stability, Dynamic Shear Rheometer (DSR) and Multiple Stress Creep Recovery (MSCR) tests were employed to investigate its high-temperature performance and permanent deformation resistance, and the Bending Beam Rheology (BBR) test was utilized to measure its low-temperature performance. Fluorescence microscopy was used to observe the composite modified asphalt’s microstructure, and Fourier Transform Infrared Spectroscopy (FTIR) was conducted to study the changes in chemical structure during the modification process. The results showed that Coumarone resin can improve the compatibility of SBS and asphalt, improve the high-temperature performance and deformation resistance of SBS-modified asphalt, and adding an appropriate amount of Coumarone resin can help enhance the low-temperature cracking resistance of modified asphalt. The optimal dosage of Coumarone resin recommended for SBS-modified asphalt performance enhancement is 2% under the test conditions, as determined by comparing the test results of samples with various dosages.

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A study on the rheological properties and modification mechanism of graphene oxide/polyurethane/SBS-modified asphalt

Cited by 10 publications

References 12 publications

Selecting the Best Performing Modified Asphalt Based on Rheological Properties and Microscopic Analysis of RPP/SBS Modified Asphalt

Selecting the Best Performing Modified Asphalt Based on Rheological Properties and Microscopic Analysis of RPP/SBS Modified Asphalt

Effect of epoxy value on the rheological properties and microcosmic mechanism of WER emulsified asphalt

Experimental study on the effect of Coumarone resin on the performance of SBS-modified asphalt

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