Improving thermo-rheological behavior and compatibility of SBR modified asphalt by addition of polyphosphoric acid (PPA)

Liang, Pei; Liang, Ming; Fan, Weiyu; Zhang, Yuzhen; Qian, Chengduo; Ren, Shisong

doi:10.1016/j.conbuildmat.2017.02.065

Cited by 93 publications

(32 citation statements)

References 30 publications

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“…On the contrary, experimental evidence suggests that the PBR polymers were completely dissolved in bitumen, with the corresponding creation of a uniform continuous phase in which no butadiene peaks could be detected by means of FTIR analyses. These outcomes and explanations are consistent with the morphological observations performed in other research projects on PMBs containing SBR and PBR polymers by means of optical and fluorescence microscopes [11,17,38]. It should also be mentioned that several researchers observed that when employing high dosages of SBR, as a result of the partial miscibility of the polymer, phase separation phenomena may occur [6,8,10,11,14].…”

Section: Results Of Chemical Characterization Testssupporting

confidence: 87%

“…Obtained results were consistent with the findings of other researchers, who reported a significant enhancement of the high-temperature characteristics of SBR-modified binders [9,12]. Nevertheless, it should be mentioned that such effects can be strongly dependent upon the specific characteristics of employed polymers and productions technologies, since other investigators found only marginal improvements in similar conditions [8,10,11].…”

Section: Saos Testssupporting

confidence: 91%

“…Several studies have shown that such improvements occur in the form of an enhanced resistance to rutting, thermal cracking, and fatigue damage [4][5][6][7][8]. Further benefits, which have been reported in literature, refer to the positive changes that can be obtained in terms of temperature susceptibility, stripping resistance, and ageing behavior [9][10][11][12]. Past experience has been, for the most part, developed through the use of thermoplastic elastomers, among which the most common are styrene-butadiene-styrene (SBS), styrene-butadiene rubber (SBR) and crumb rubber (CR) derived from end-of-life tires [4,6,[13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification

et al. 2020

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The study described in this paper focused on the possible use of waste products coming from the production of styrene–butadiene rubber (SBR) and polybutadiene rubber (PBR), as bitumen modifiers. Modified binders containing these products were prepared in the laboratory with different polymer dosages and were thereafter subjected to the evaluation of empirical and rheological properties. For comparative purposes, the study also considered SBR and PBR products of premium quality. Ageing effects were also taken into account by means of proper laboratory simulations. Obtained results indicated that the two types of polymer (SBR and PBR) have completely different effects on the rheology and expected performance of the resulting modified binders. In particular, while the two polymers showed similar effects in terms of resistance to permanent deformation, the SBR products proved to be superior from the viewpoint of fatigue resistance. However, only minor differences were found when comparing the effects produced by premium quality and waste polymers. As a result of the experimental findings, it was concluded that the use of waste SBR polymers can be an attractive solution for the production of affordable modified binders.

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Section: Results Of Chemical Characterization Testssupporting

confidence: 87%

Section: Saos Testssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification

et al. 2020

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“…These defects limit SBR-modified asphalt’s further application and development. Thus, extensive research has been conducted to obtain a high-quality SBR-modified asphalt [ 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Phenolic Resin on the Rheological and Morphological Characteristics of Styrene-Butadiene Rubber-Modified Asphalt

Cheng

Zhang

2020

Materials

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To improve the thermal-aging stability and rheological performance of styrene–butadiene rubber (SBR)-modified asphalt, phenolic resin (PF) was introduced in the process of preparing SBR-modified asphalt by melt blending. The effect of PF and SBR on the high and low-temperature rheological performance of the asphalt binder before and after aging was evaluated by a temperature and frequency sweep using a dynamic shear rheometer (DSR). Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), and fluorescence microscopy (FM) were used to further investigate the effect of PF and SBR on the thermal stability and morphological characteristics of the asphalt binder. The results showed that the addition of PF can enhance the high-temperature deformation resistance and short-term aging resistance of SBR-modified asphalt. Moreover, PF and SBR form an embedded network structure within the asphalt binder and alleviate the deterioration of the polymer during the aging process. Compared with SBR-modified asphalt, the chemical system of composite-modified asphalt is more stable, and it can remain stable with an aging time of less than 5 h.

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“…The result demonstrates that PPA has the potential to significantly improve the resistance to the flowability of modified binder and to help reduce the occurrence of rutting distress on asphalt pavement. What is more, the critical shear rate transfers to a lower shear rate region and is more sensitive to shear stress, indicating that composite modified asphalt has more complicated and stronger interactions and entanglements among SBS, OSDOA, and PPA [ 44 , 45 ]. Therefore, OSDOA and PPA have a positive effect on the enhancement of the anti-flow behavior of asphalt pavement.…”

Section: Resultsmentioning

confidence: 99%

Influence of Compound Modification of Oil Sands De-Oiled Asphalt and Polyphosphoric Acid on High- and Low-Temperature Performance of Styrene-Butadiene-Styrene-Modified Asphalt

Pei

Fan

2021

Materials

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Oil sands de-oiled asphalt (OSDOA) has become a bottleneck for refineries due to its enormous production and huge landfill costs. Applying OSDOA as a modifier is an effective way to reduce environmental pollution and disposal cost. In this study, the influences of OSDOA and polyphosphoric acid (PPA) compound modification on styrene-butadiene-styrene (SBS)-modified binder were investigated. The high-temperature rutting resistance, low-temperature anti-crack performance and fatigue resistance were obtained by dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test. Storage stability and microstructure were also investigated by storage test and Fourier-transform infrared (FTIR) spectroscopy. The results demonstrated that the compound modification of OSDOA/PPA dramatically enhanced the deformation resistance of SBS-modified binder and reduced its low-temperature cracking resistance. The anti-fatigue performance was also decreased. Moreover, the combined effect of OSDOA and PPA could produce composite modified asphalt with excellent storage stability, which was verified by desirable fluorescence images. Furthermore, both physical and chemical interactions coexisted during the OSDOA/PPA compound modification process. Consequently, the optimal doses of OSDOA and PPA were determined to be 10 wt% and 1.0 wt%, considering of the balance between high- and low-temperature characteristics and storage stability of composite modified asphalt.

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Improving thermo-rheological behavior and compatibility of SBR modified asphalt by addition of polyphosphoric acid (PPA)

Cited by 93 publications

References 30 publications

Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification

Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification

Effect of Phenolic Resin on the Rheological and Morphological Characteristics of Styrene-Butadiene Rubber-Modified Asphalt

Influence of Compound Modification of Oil Sands De-Oiled Asphalt and Polyphosphoric Acid on High- and Low-Temperature Performance of Styrene-Butadiene-Styrene-Modified Asphalt

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