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Naus, Robbert (author), Dekkers, Rudi (author), Waarts, Paul (author), Apostolidis, P. (author), Erkens, S. (author), Liu, X. (author)In de wegenbouw is duurzaamheid een belangrijk speerpunt. Daarom wordt er gezocht naar nieuwe bindmiddelen en modificaties om duurzame oplossingen te vinden voor de alsmaar groeiende verkeersstromen. Met de introductie van asfalt met epoxygemodificeerde bitumen wordt een grote stap gezet in het realiseren van robuuste wegen met een langere...conference paper 2022
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Anupam, K. (author), Liu, X. (author), Scarpas, Athanasios (author), Apostolidis, P. (author), Erkens, S. (author), van Aggelen, M. (author)Membranes of sufficient bonding characteristics could improve the integrity of the multi-layer structures on orthotropic steel deck bridges (OSBDs), enhancing thus the structural response of these systems and, ultimately, their service life. In this research, full-scale experiments were performed at the LINTRACK accelerated pavement testing...journal article 2022
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Wang, H. (author), Zhang, H. (author), Liu, X. (author), Apostolidis, P. (author), Erkens, S. (author), Scarpas, Athanasios (author), Leng, Zhen (author), Airey, G.D. (author)Crumb rubber modified bitumen (CRMB) can be regarded as a binary composite system in which swollen rubber particles are embedded in the bitumen matrix. Previous study has successfully implemented the micromechanics models in predicting the complex moduli of CRMB binders using more representative constituent parameters. In the regime of master...journal article 2022
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Ren, S. (author), Liu, X. (author), Lin, P. (author), Gao, Y. (author), Erkens, S. (author)The compatibility potential of rejuvenators plays an important role in improving the blending degree of rejuvenated bitumen. This study aims at estimating the efficiency of molecular dynamics (MD) simulation in predicting the compatibility between rejuvenators and aged bitumen, and exploring the influence of rejuvenator type, aging degree of...journal article 2022
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Ren, S. (author), Liu, X. (author), Lin, P. (author), Erkens, S. (author)This study investigated the effects of swelling-degradation degree on the rheological properties and thermal pyrolysis behaviors of crumb rubber modified bitumen (CRMB). The equilibrium viscosity of CRMB in 160 ◦Cswelling process is 10.5 Pa·s at 8 h. During the 200℃-degradation procedure, the viscosity increased to a maximum value of 20.58 Pa·s...journal article 2022
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Ren, S. (author), Liu, X. (author), Erkens, S. (author), Lin, P. (author), Gao, Y. (author)The molecular dynamics (MD) simulation method is proved as an efficient tool to explore the intermolecular interaction between rejuvenators and aged bitumen, but the simple “singlemolecule” model of rejuvenator would bring the inaccuracy to simulation outputs due to a huge difference with its realistic multi-component chrematistic. This study...journal article 2022
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Ren, S. (author), Liu, X. (author), Lin, P. (author), Erkens, S. (author), Gao, Y. (author)Molecular dynamics (MD) simulation is an advanced tool to explore the interaction mechanism between aged bitumen and rejuvenators at the nanoscale. However, the general MD molecular structures of rejuvenators led to the lower quantify and inaccuracy of the simulation outputs. This study aims at developing more realistic molecular models to...journal article 2022
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Zhang, Y. (author), Liu, X. (author), Ren, S. (author), Jing, R. (author), Lin, P. (author), Apostolidis, P. (author), Erkens, S. (author), Wang, Xuancang (author), Scarpas, Athanasios (author)Lignin, one of the most abundant natural polymers, has been extensively studied as an additive in bituminous binders. Even though the lignin improves the overall resistance against oxidative aging of bitumen, it could lead to high thermal cracking sensitivity. In this study, a bio-oil (i.e., rapeseed oil) is implemented in lignin-modified...journal article 2022
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Ren, S. (author), Liu, X. (author), Lin, P. (author), Jing, R. (author), Erkens, S. (author)This study aimed to explore the long-term aging influence on chemo rheological properties and develop novel consecutive models for the long-term aging reaction kinetics of bitumen. The results revealed that the aging index was significantly dependent on the types of selected parameters. The Zero-order model was suitable to describe the long-term...journal article 2022
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Jing, R. (author), Apostolidis, P. (author), Liu, X. (author), Erkens, S. (author), Scarpas, Athanasios (author)Pavement materials containing epoxy-asphalt are mainly used to enhance the fatigue cracking resistance of surfacing layers on bridges. These materials have also been proposed for roadways, but limited field data are available. In this research, a fully instrumented epoxy-modified asphalt surfacing layer was applied to measure strain responses in...journal article 2022
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Wang, H. (author), Liu, X. (author), Apostolidis, P. (author), Wang, Di (author), Leng, Zhen (author), Lu, Guoyang (author), Erkens, S. (author), Scarpas, Athanasios (author)Rubberized asphaltic materials have been frequently combined with warm-mix asphalt technologies to tackle the issues of high energy consumptions and emissions during construction. Effective and accurate characterization of binder properties is conducive to the improvement of long-term pavement performance. The current study aims to quantify...journal article 2021
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Ren, S. (author), Liu, X. (author), Lin, P. (author), Wang, H. (author), Fan, W. (author), Erkens, S. (author)The chemo-rheological properties of crumb rubber modified bitumen are always unstable due to the mutable and uncontrollable swelling-degradation degree of crumb rubber in bitumen matrix. The study aimed at exploring the continuous swelling and degradation behaviors of crumb rubber modified bitumen (CRMB) considering the influence of rubber size...journal article 2021
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Ren, S. (author), Liu, X. (author), Lin, P. (author), Erkens, S. (author)This study elaborates the influence of blends formulated by waste oil (WO) and styrene-butadiene rubber (SBR) on thermo-mechanical and chemical compositional characteristics of rejuvenated bitumen. The results show that both WEO (waste engine oil) and WCO (waste cooking oil) can compensate viscous component for reclaimed bitumen, and the effect...conference paper 2021
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Zhang, Y. (author), Liu, X. (author), Ren, S. (author), Jing, R. (author), Gard, W.F. (author), Apostolidis, P. (author), Erkens, S. (author), Scarpas, Athanasios (author)Lignin, one of the most abundant natural polymers, has been extensively studied as liquid or solid additive in bituminous binders. Despite the fact the organosolv lignin in bitumen improves the overall resistance against oxidative aging, lignin could lead to binders of high thermal cracking sensitivity. In this study, a bio-based oil is...conference paper 2021
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Wang, H. (author), Liu, X. (author), Varveri, Aikaterini (author), Zhang, H. (author), Erkens, S. (author), Scarpas, Athanasios (author), Leng, Zhen (author)Considering the application scenarios of rubber granules from waste tires in the bitumen modification process (wet or dry process), both aerobic and anaerobic aging of rubber may occur. The current study aims to investigate the thermal aging behavior of waste tire rubber samples using nanoindentation and environment scanning electron microscopy ...journal article 2021
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Jing, R. (author), Varveri, Aikaterini (author), Liu, X. (author), Scarpas, Athanasios (author), Erkens, S. (author)The degradation of bituminous materials as a result of ageing has a significant effect on asphalt pavement performance. In this study, one porous asphalt (PA) section and one stone mastic asphalt (SMA) asphalt pavement section were designed and constructed in 2014 and exposed to the actual environmental condition. To study the change in the...journal article 2021
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Jing, R. (author), Apostolidis, P. (author), Liu, X. (author), Naus, Robbert (author), Erkens, S. (author), Scarpas, Athanasios (author)The rejuvenation of epoxy modified bituminous binders is a topic of much debate because such binders may not be able to melt at high temperatures and restore their properties using recycling agents. This paper presents the results of an experimental program developed to evaluate the re-usability of an epoxy modified bitumen, or epoxy bitumen, by...journal article 2021
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Lin, P. (author), Liu, X. (author), Apostolidis, P. (author), Erkens, S. (author), Zhang, Y. (author), Ren, S. (author)Observing the microstructure of bituminous binders with an environmental scanning electron microscope (ESEM) can contribute significantly to reveal the underlying rejuvenation mechanism. In this study, three rejuvenators were selected to regenerate the aged SBS modified binders at five dosages, and their rheology was evaluated using a dynamic...journal article 2021
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Ren, S. (author), Liu, X. (author), Zhang, Y. (author), Lin, P. (author), Apostolidis, P. (author), Erkens, S. (author), Li, Mingliang (author), Xu, Jian (author)Lignin, as a major waste from biofuel and paper industries, could be utilized as a modifier to enhance the relevant performance of bitumen. However, the effects of lignin on the thermodynamics properties and molecular structure of bitumen are rarely studied. Meanwhile, the potential modification mechanism of lignin modified bitumen is still...journal article 2021
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Ren, S. (author), Liu, X. (author), Lin, P. (author), Erkens, S. (author), Xiao, Yue (author)To further explore the long-term aging behaviors of bitumen from the multiscale perspectives, the experimental characterization and molecular dynamics (MD) simulation methods were performed. Series of chemical properties for the virgin and various aged bitumen were evaluated using the TCL-FID, ATR-FTIR, Elemental analysis and GPC tests. The...journal article 2021