Investigation on the epoxy/polyurethane modified asphalt binder cured with bio-based curing agent: Properties and optimization

Sun, Jia; Zhang, Zengping; Wang, Li; Líu, Hao; Ban, Xiaoyi; Ye, Junjie

doi:10.1016/j.conbuildmat.2021.126221

Cited by 37 publications

(9 citation statements)

References 41 publications

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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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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 generation of curing reactions in ESA binders leads to an increase in viscosity. The ESA binder was generally required for a sufficient allowable time to ensure successful construction [37]. Figure 5b illustrates the viscosity test results of the ESA binder.…”

Section: Mechanical Property and Viscosity Characteristics Of The Esa...mentioning

confidence: 99%

Materials Optimization and Service Performance Evaluation of a Novel Steel Bridge Deck Pavement Structure: A Case Study

Haibara,

Ge,

Sun

2023

Applied Sciences

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Although the double-layer pavement structure with a top layer of stone mastic asphalt concrete (SMAC) and a bottom layer of epoxy asphalt concrete (EAC) has been confirmed to have excellent overall performance in the laboratory, there is a lack of comparison and verification in practical projects. Hence, the utilization of the SMAC + EAC structure in this steel bridge deck pavement (SBDP) practical project and the clarification of its service performance are of significant importance for facilitating the promotion and application of this novel structure. This study relied on an SBDP reconstruction project in Ningbo, China. Indoor performance tests were used to determine the appropriate material compositions for SMAC and EAC. Subsequently, both ERS and SMAC + EAC pavement structures were paved in the project, and the service conditions of the different pavements after one year of operation were tested and compared. The results indicated that the epoxy SBS asphalt (ESA) binder prepared by substituting SBS-modified asphalt binder for the base binder, exhibited improved mechanical strength and toughness. The variation of modifier content significantly affected the high-temperature stability, low-temperature crack resistance, and moisture damage resistance of epoxy SBS asphalt concrete (ESAC) and high-viscosity SBS asphalt concrete (HSAC), while the gradation mainly influenced the skid resistance. The optimal contents of modifiers in ESA and HAS binders were finalized at 45 wt% and 11 wt%. After one year of operation on the trial road, the pavement performance of the SMAC + EAC structure had significant advantages over the ERS system, with all lanes having an SBDP quality index (SDPQI) above 90 and an excellent service condition. The successful application of the SMAC + EAC structure validated its applicability and feasibility in SBDP, which provided strong evidence for the further promotion of this structure.

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“…He found that SBS/PU composite-modified asphalt had good low-temperature resistance and that its high-temperature performance was lower than that of SBS modified asphalt; he determined 4% SBS content and 15% PU content as the suitable types of SBS/PU composite-modified asphalt [29]. The PU/epoxy resin underwent a reaction with the curing agent to form an interpenetrating polymer network structure in a PU/epoxy resin composite-modified asphalt system and exhibited excellent mechanical properties and thermal storage stability [30,31]. Yu analyzed the weakening of asphalt characteristic peaks in the FTIR spectrum and reported that the isocyanate group reacted with active hydrogen in the asphalt to form cross-linking, and the PU chain was broken and degraded after aging [32].…”

Section: Introductionmentioning

confidence: 99%

Rheological and Aging Properties of Vegetable Oil-Based Polyurethane (V-PU) Modified Asphalt

2023

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To study the rheological and aging properties of vegetable oil–based polyurethane (V-PU)–modified asphalt, V-PU terminated with an –NCO group was synthesized from renewable castor oil, and liquefied MDI-100LL and 10–40 wt% V-PU modified asphalts were prepared. Temperature classification, multiple stress creep recovery (MSCR), and linear amplitude scanning (LAS) tests were carried out. The results showed that the modulus, the creep recovery rate (R), and the yield stress and yield strain of the V-PU modified asphalts significantly increased in the order: 0 wt% < 10 wt% < 20 wt% < 40 wt% < 30 wt%, while the phase angle and the unrecoverable creep compliance (Jnr) changed in the opposite order, and the high temperature grade of 30 wt% V-PU modified asphalt was 4 grades higher than that of the base asphalt, which indicated that the addition of V-PU enhanced the fatigue, permanent deformation, and recovery deformation resistance. The 30 wt% sample-exhibited phase inversion had the best performance. Comprehensive FTIR, GPC, and fluorescence microscopy analyses showed that the molecular weight significantly increased and the V-PU molecules agglomerated after aging. The excess–NCO groups of V-PU prepolymer react with water in the air and the active hydrogen in the asphalt system and finally form a cross-linked three-dimensional network structure with the asphalt to improve performance. The mechanism of intramolecular cementation reaction and the aging process of V-PU-modified asphalt was creatively derived.

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Investigation on the epoxy/polyurethane modified asphalt binder cured with bio-based curing agent: Properties and optimization

Cited by 37 publications

References 41 publications

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

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

Materials Optimization and Service Performance Evaluation of a Novel Steel Bridge Deck Pavement Structure: A Case Study

Rheological and Aging Properties of Vegetable Oil-Based Polyurethane (V-PU) Modified Asphalt

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