A laboratory study of epoxy/polyurethane modified asphalt binders and mixtures suitable for flexible bridge deck pavement

Zhang, Zengping; Sun, Jia; Huang, Zhigang; Wang, Feng; Jia, Meng; Lv, Wei; Ye, Junjie

doi:10.1016/j.conbuildmat.2020.122084

Cited by 62 publications

(11 citation statements)

References 42 publications

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“…For SBS modified asphalt system, the content of SBS modifier had little effect on the stability of WPU/SBS composite modified asphalt system, which was greatly influenced by WPU content. The more WPU that was added, the more unstable WPU/SBS composite modified asphalt system was, indicating the poor compatibility between WPU and asphalt [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Properties and Micro-Characteristics of Waste Polyurethane/Styrene-Butadiene-Styrene Composite Modified Asphalt

2021

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In order to solve the problems caused by asphalt diseases and prolong the life cycle of asphalt pavement, many studies on the properties of modified asphalt have been conducted, especially polyurethane (PU) modified asphalt. This study is to replace part of the styrene-butadiene-styrene (SBS) modifier with waste polyurethane (WP), for preparing WP/SBS composite modified asphalt, as well as exploring its properties and microstructure. On this basis, this paper studied the basic performance of WP/SBS composite modified asphalt with a conventional performance test, to analyze the high- and low-temperature rheological properties, permanent deformation resistance and storage stability of WP/SBS composite modified asphalt by dynamic shear rheometer (DSR) and bending beam rheometer (BBR) tests. The microstructure of WP/SBS composite modified asphalt was also observed by fluorescence microscope (FM) and Fourier transform infrared spectroscopy (FTIR), as well as the reaction between WP and asphalt. According to the results of this study, WP can replace SBS as a modifier to prepare WP/SBS composite modified asphalt with good low-temperature resistance, whose high-temperature performance will be lower than that of SBS modified asphalt. After comprehensive consideration, 4% SBS content and 15% WPU content (4 S/15 W) are determined as the suitable types of WPU/SBS composite modified asphalt.

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Section: Resultsmentioning

confidence: 99%

Evaluation of Properties and Micro-Characteristics of Waste Polyurethane/Styrene-Butadiene-Styrene Composite Modified Asphalt

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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“…A WDW-100 electronic tensile testing machine produced by the MTS Corporation (USA) was used. In accordance with related literature [35,36], the test temperature was set to 15 • C, and the tensile rate was 500 mm/min.…”

Section: Experimental Methodsmentioning

confidence: 99%

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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A laboratory study of epoxy/polyurethane modified asphalt binders and mixtures suitable for flexible bridge deck pavement

Cited by 62 publications

References 42 publications

Evaluation of Properties and Micro-Characteristics of Waste Polyurethane/Styrene-Butadiene-Styrene Composite Modified Asphalt

Evaluation of Properties and Micro-Characteristics of Waste Polyurethane/Styrene-Butadiene-Styrene Composite Modified Asphalt

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

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

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