Effects of Polyurethane Thermoplastic Elastomer on Properties of Asphalt Binder and Asphalt Mixture

Zhang, Zengping; Sun, Jia; Jia, Meng; Ban, Xiaoyi; Wang, Li; Chen, Liqi; Huang, Ting; Liu, Hao

doi:10.1061/(asce)mt.1943-5533.0003591

Cited by 44 publications

(18 citation statements)

References 33 publications

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“…A larger S and smaller m indicate reduced low-temperature crack resistance. Compared with the SBS-2 modified asphalt, the 90-1 base asphalt had a greater increase in S and a greater decrease in m, indicating that the low-temperature crack resistance of the modified asphalt after aging was better than that of the base asphalt [48,49]. modified asphalt at UV32h and UV64h decreased compared with that before aging, while the S of 90-1 base asphalt after aging showed an increasing trend.…”

Section: Bending Beam Rheological Testmentioning

confidence: 89%

“…A larger S and smaller m indicate reduced low-temperature crack resistance. Compared with the SBS-2 modified asphalt, the 90-1 base asphalt had a greater increase in S and a greater decrease in m, indicating that the low-temperature crack resistance of the modified asphalt after aging was better than that of the base asphalt [48,49]. Through an analysis of the BBR test, it could be seen that UV aging reduced the lowtemperature crack resistance of asphalt; the longer the UV aging time, the more severe the degradation of asphalt performance.…”

Section: Bending Beam Rheological Testmentioning

confidence: 96%

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Aging Characteristics of Asphalt Binder under Strong Ultraviolet Irradiation in Northwest China

2021

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Asphalt pavement is significantly affected by ultraviolet (UV) aging. Therefore, the establishment of an asphalt UV aging evaluation system is desirable for highway construction in areas which experience strong UV radiation. In this study, Dunhuang City in Gansu Province (northwest China) was used as the research site. Base and SBS modified asphalts were selected, and their performance changes before and after UV aging were studied. An asphalt UV aging evaluation system was established, including the conditions for an indoor, accelerated UV aging test as well as evaluation indicators. The results showed that the adverse effect of UV aging on asphalt performance was greater than that of RTFOT and PAV, and that the low-temperature performance of asphalt degraded most rapidly. SBS modified asphalt was more resistant to UV aging than base asphalt, while 60/80 pen grade base asphalt was found to be unsuitable for use on pavements which are exposed to strong UV radiation. The residual penetration, penetration attenuation index at 25 °C, and residual ductility of the asphalt were used as indicators to characterize the aging of asphalt, while the fracture energy method was used as a supplementary evaluation method.

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Section: Bending Beam Rheological Testmentioning

confidence: 89%

“…A larger S and smaller m indicate reduced low-temperature crack resistance. Compared with the SBS-2 modified asphalt, the 90-1 base asphalt had a greater increase in S and a greater decrease in m, indicating that the low-temperature crack resistance of the modified asphalt after aging was better than that of the base asphalt [48,49]. Through an analysis of the BBR test, it could be seen that UV aging reduced the lowtemperature crack resistance of asphalt; the longer the UV aging time, the more severe the degradation of asphalt performance.…”

Section: Bending Beam Rheological Testmentioning

confidence: 96%

Aging Characteristics of Asphalt Binder under Strong Ultraviolet Irradiation in Northwest China

2021

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“…As demonstrated in Table 3 , according to the “Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering.” (JTG E20–2011) and “Field Test Methods of Highway Subgrade and Pavement” (JTG 3450–2019) of China [ 24 , 25 ], the rutting test, bending beam test, freeze–thaw splitting tensile strength test, and pendulum test were used to experimentally investigate the high-temperature stability, low-temperature crack resistance, moisture damage resistance, and skid resistance of asphalt mixtures, respectively [ 26 , 27 , 28 ]. Moreover, the flatness, skid resistance, compaction degree, anti-permeability performance, and rutting depth of the test roads before and after operation were compared by the flatness test, pendulum test, compaction test, permeability test, and rutting depth test.…”

Section: Test Methodsmentioning

confidence: 99%

Laboratory and Field Performance Evaluation of High-Workability Ultra-Thin Asphalt Overlays

et al. 2022

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The defects of poor workability and inadequate pavement performance of the ultra-thin asphalt overlay limited its application in the preventive maintenance of pavements. In this study, a high-workability ultra-thin (HWU) asphalt overlay scheme was proposed. A high-strength-modified asphalt binder and an optimized HWU-10 gradation were used to prepare the HWU asphalt mixture and explore its laboratory performance. Furthermore, the HWU asphalt mixture was used for the test road paving. Based on the field performance test results before and after the test road for one year of traffic operation, the application performance of the HWU asphalt mixture and styrene-butadiene-styrene (SBS)-modified asphalt mixture was compared and analyzed. The results showed that the HWU asphalt mixture possessed satisfactory laboratory pavement performance, and its high-temperature stability and moisture damage resistance were better than those of the SBS-modified asphalt mixture. The asphalt mixture prepared using HWU-10 gradation was easily compacted and showed good workability. After one year of operation, all field performance of the ultra-thin overlay paved with HWU asphalt mixture met the specification requirements, but its flatness and skid resistance decreased. It is worth mentioning that the HWU asphalt mixture was significantly better than the SBS-modified asphalt mixture in terms of performance degradation resistance and rutting resistance. The studies to enhance the road intersection pavement performance and ensure the homogeneous dispersion of polyester fibers in the asphalt mixture will be considered in the future.

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“…In the meantime, the bonding between old and fresh asphalt mixtures is relatively weaker, and the penetration depth of fresh asphalt is low in small cracks, which limits its application in pavement repair [ 5 ]. As a supplement, various special polymer materials, including emulsified asphalt [ 6 ], polyurethane (PU) [ 7 ], and epoxy resin (ER) [ 8 ] have been adopted in pavement engineering. Polymer materials exhibit several excellent performances in terms of the corrosion resistance [ 9 ], inflaming retarding [ 10 ], thermal stability [ 11 ], and fracture toughness [ 12 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Properties and Its Prediction of Polymer Concrete for the Repair of Asphalt Pavements

Ren

2022

Polymers

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Polymer concrete (PC) is considered a promising repair material for asphalt pavement, since it has excellent paving performance and water stability. Although the mechanical properties of PC have been widely researched, the fatigue behavior of PC under traffic loads was still poorly understood. To predict the fatigue life and optimize the material design of PC, the semi-circular bending (SCB) tests were performed, considering different polymer content, sand ratio, aggregate features and stress condition. Two typical polymer materials were applied to prepare PC specimens, including epoxy resin (ER) and polyurethane (PU). The aggregate features were analyzed by the aggregate image measurement system. The mechanical behavior under repeated loads was investigated by the displacement, fatigue life and stiffness modulus. Results show that the flexural strength increases nonlinearly with the increasing polymer content, rapidly at first, and then slowly. The optimized polymer content and sand ratio were respectively 15% and 30%. As the loading number increases, the vertical displacement of PC shows three stages, i.e., undamaged stage, damage development stage, and fatigue failure stage. The stiffness modulus of the specimen is stress-dependent. An empirical model was developed to predict the fatigue life of PC, which can effectively capture the effects of the polymer content, sand ratio and stress level (or nominal stress ratio). It suggests that the fatigue life has a strong correlation with the mixing gradation, and the optimal sand ratio of PC can be determined by the proposed function. Moreover, the effect of aggregate shapes cannot be neglected.

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Effects of Polyurethane Thermoplastic Elastomer on Properties of Asphalt Binder and Asphalt Mixture

Cited by 44 publications

References 33 publications

Aging Characteristics of Asphalt Binder under Strong Ultraviolet Irradiation in Northwest China

Aging Characteristics of Asphalt Binder under Strong Ultraviolet Irradiation in Northwest China

Laboratory and Field Performance Evaluation of High-Workability Ultra-Thin Asphalt Overlays

Fatigue Properties and Its Prediction of Polymer Concrete for the Repair of Asphalt Pavements

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