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Yuefeng Zhu
School of Traffic and Transportation, Shijiazhuang Tiedao University, Shijiazhuang 050043, China

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Journal article
Published: 19 March 2021 in Sustainability
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As asphalt materials are exposed to very high temperatures before construction, such as in the transportation stage or the storage stage, short-term aging of asphalt material occurs. At these stages, diffusion or blending between RAP (reclaimed asphalt pavement) binder and virgin binder may occur. In this study, recycled blends, incorporating SBS modified binder, RAP binder and recycling agents, were prepared with incremental RAP binders of up to 40%, and RTFO (Rolling Thin-Film Oven) tests in condition times of 300 and 600 min were conducted on the recycled blends. Characterization tests included ΔTcr , complex modulus master curve, a G-R (Glover-Rowe) parameter on recycled blends, and dynamic modulus, fracture test, and midpoint bending fatigue tests on mixtures. The ΔTcr and the G-R parameter results showed that aging time significantly affected the cracking resistance of the recycled blends. Compared to the virgin SBS modified asphalt binder, the recycled blends tended to be more sensitive to the aging process. The complex modulus master curve of binders and the dynamic modulus and phase angle results of mixtures show that the binder/mixtures appear to be stiffer with an increase in the RAP binder dosage. Generally, the low temperature cracking and fatigue cracking resistance of virgin mixtures is better than that of RAP mixtures, especially for high RAP binder dosage mixtures, and longer aging times have a negative impact on the cracking resistance of mixture. However, when we extend RTFO aging time, the higher dosage of RAP mixtures show better cracking resistance than the lower dosage of RAP mixtures. The reason for this could be that the chemical process may occur between the virgin SBS modified asphalt binder and the RAP binder at high temperatures.

ACS Style

Yuefeng Zhu; Jiawei Zhang; Chundi Si; Tao Yan; Yanwei Li. Laboratory Evaluation on Performance of Recycled Asphalt Binder and Mixtures under Short-Term Aging Conditions. Sustainability 2021, 13, 3404 .

AMA Style

Yuefeng Zhu, Jiawei Zhang, Chundi Si, Tao Yan, Yanwei Li. Laboratory Evaluation on Performance of Recycled Asphalt Binder and Mixtures under Short-Term Aging Conditions. Sustainability. 2021; 13 (6):3404.

Chicago/Turabian Style

Yuefeng Zhu; Jiawei Zhang; Chundi Si; Tao Yan; Yanwei Li. 2021. "Laboratory Evaluation on Performance of Recycled Asphalt Binder and Mixtures under Short-Term Aging Conditions." Sustainability 13, no. 6: 3404.

Journal article
Published: 13 August 2020 in Physics and Chemistry of the Earth, Parts A/B/C
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Flexible pavements are typically designed using historical climate but are challenged by future climate change. Quantifying impacts of climate change on pavement service life can assist road authorities in planning for climate adaptation and, eventually, build climate resilience into road infrastructure design and management. In this study, a novel data-driven methodology is developed in order to quantify impacts of climate change on pavement service life in locations where Falling Weight Deflectometer (FWD) data are continuously measured, by means of: 1) training a supervised model (linear regression or Artificial Neural Networks, ANN) using historical climate data, maintenance, and traffic data as the candidate inputs and pavement layer stiffness back calculated from FWD testing as the outputs; 2) predicting layer stiffness using statistically downscaled future climate projections for three Coupled Model Intercomparison Project Phase 5 global climate models and three greenhouse gas concentration scenarios for four future 20-year periods; and 3) estimating changes in pavement stiffness and service lives due to climate change. A case study performed on a pavement section in Minnesota has shown that pavement layer stiffness will have a long-term reduction under future climate and the investigated pavement will lose up to 22.5% service life at the end of the century (2080–2099) from the 20 years’ service life compared to the baseline climate (1979–1998).

ACS Style

Yaning Qiao; Yang Zhang; Yuefeng Zhu; Trent Lemkus; Anne M.K. Stoner; Jizhe Zhang; Yuanlong Cui. Assessing impacts of climate change on flexible pavement service life based on Falling Weight Deflectometer measurements. Physics and Chemistry of the Earth, Parts A/B/C 2020, 120, 102908 .

AMA Style

Yaning Qiao, Yang Zhang, Yuefeng Zhu, Trent Lemkus, Anne M.K. Stoner, Jizhe Zhang, Yuanlong Cui. Assessing impacts of climate change on flexible pavement service life based on Falling Weight Deflectometer measurements. Physics and Chemistry of the Earth, Parts A/B/C. 2020; 120 ():102908.

Chicago/Turabian Style

Yaning Qiao; Yang Zhang; Yuefeng Zhu; Trent Lemkus; Anne M.K. Stoner; Jizhe Zhang; Yuanlong Cui. 2020. "Assessing impacts of climate change on flexible pavement service life based on Falling Weight Deflectometer measurements." Physics and Chemistry of the Earth, Parts A/B/C 120, no. : 102908.

Journal article
Published: 07 January 2020 in Applied Sciences
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It is well-accepted that the ionic copolymer poly (ethylene-co-methacrylic) acid (also named EMAA) is one type of self-healing material. This particular capability has great potential for extending the service life of infrastructures. In order to improve the rheological, mechanical, and self-healing properties of asphalt binder and asphalt mixtures, EMAA and styrene butadiene rubber (SBR) were selected as the additives. In this study, the effects of EMAA and SBR on the performance of bitumen and asphalt mixtures were examined and characterized using various parameters including rheological indices, Glover–Rowe parameter, ductility self-healing rate, fluorescence microscopy, and scanning electron microscope (SEM) test on binders, and different testing methods such as complex modulus, thermal stress-restrained specimen test (TSRST), disk-shaped compact tension (DCT), and fatigue–healing–fatigue test on the mixtures. The results showed that EMAA can significantly improve the stiffness and self-healing capacity of virgin and SBR modified binders and mixtures. Moreover, the cracking resistance of EMAA/SBR compound modified binder and mixture showed a significant improvement. However, EMAA is not recommended to be added as a modifier to virgin binders and mixtures due to its poor cracking resistance. Some novel tests and parameters mentioned in this paper are recommended for characterizing binders and mixtures in the future.

ACS Style

Yuefeng Zhu; Reyhaneh Rahbar-Rastegar; Yanwei Li; Yaning Qiao; Chundi Si. Exploring the Possibility of Using Ionic Copolymer Poly (Ethylene-co-Methacrylic) Acid as Modifier and Self-Healing Agent in Asphalt Binder and Mixture. Applied Sciences 2020, 10, 426 .

AMA Style

Yuefeng Zhu, Reyhaneh Rahbar-Rastegar, Yanwei Li, Yaning Qiao, Chundi Si. Exploring the Possibility of Using Ionic Copolymer Poly (Ethylene-co-Methacrylic) Acid as Modifier and Self-Healing Agent in Asphalt Binder and Mixture. Applied Sciences. 2020; 10 (2):426.

Chicago/Turabian Style

Yuefeng Zhu; Reyhaneh Rahbar-Rastegar; Yanwei Li; Yaning Qiao; Chundi Si. 2020. "Exploring the Possibility of Using Ionic Copolymer Poly (Ethylene-co-Methacrylic) Acid as Modifier and Self-Healing Agent in Asphalt Binder and Mixture." Applied Sciences 10, no. 2: 426.

Journal article
Published: 30 September 2019 in Sustainability
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Reclaimed asphalt pavement (RAP) has received wide application in asphalt pavement construction and maintenance and it has shown cost-effectiveness over virgin hot mix asphalt (HMA). HMA with a high content of reclaimed asphalt (RA) (e.g., 40%) is sometimes used in practice, however, it may have significant adverse effects on the life cycle performance and related costs. In particular, challenges may arise as the life cycle performance of RAP is also affected by local climatic conditions. Thus, it is important to investigate whether it is still economic to use RAP under future local climate, with consideration of life cycle performance. A case study was conducted for various road structures on Interstate 95 (I-95) in New Hampshire (NH), USA for the investigation. The case study utilized dynamic modulus testing results for local virgin HMA and HMA with 40% RA (as major material alternatives) to predict life cycle performance of the selected pavement structures, considering downscaled future climates. Then, a life cycle cost analysis (LCCA) was considered to estimate and compare the life cycle cash flow of the investigated road structures. Responsive maintenance (overlay) and effectiveness were also considered in this study. It was found that using 40% RA in HMA can reduce agency costs by up to approximately 18% under the 2020–2040 predicted climate and NH should consider this practice under predicted future climate to reduce agency costs.

ACS Style

Yaning Qiao; Eshan Dave; Tony Parry; Omar Valle; Lingyun Mi; Guodong Ni; Zhenmin Yuan; Yuefeng Zhu. Life Cycle Costs Analysis of Reclaimed Asphalt Pavement (RAP) Under Future Climate. Sustainability 2019, 11, 5414 .

AMA Style

Yaning Qiao, Eshan Dave, Tony Parry, Omar Valle, Lingyun Mi, Guodong Ni, Zhenmin Yuan, Yuefeng Zhu. Life Cycle Costs Analysis of Reclaimed Asphalt Pavement (RAP) Under Future Climate. Sustainability. 2019; 11 (19):5414.

Chicago/Turabian Style

Yaning Qiao; Eshan Dave; Tony Parry; Omar Valle; Lingyun Mi; Guodong Ni; Zhenmin Yuan; Yuefeng Zhu. 2019. "Life Cycle Costs Analysis of Reclaimed Asphalt Pavement (RAP) Under Future Climate." Sustainability 11, no. 19: 5414.

Conference paper
Published: 04 May 2018 in Proceedings of GeoShanghai 2018 International Conference: Transportation Geotechnics and Pavement Engineering
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In order to analyze the impact of reclaimed asphalt pavement (RAP) on cracking property of hot mix asphalt (HMA), different RAP contents (10%, 20% and 30%) and gradation (12.5 mm and 19 mm NMAS) of HMA were designed. This study evaluated thermal and fatigue cracking performances for six asphalt mixtures using two testing methods: Disk-Shaped Compact Tensile (DCT) test and Simplified Viscoelastic Continuum Damage (S-VECD) approach using uniaxial tensile fatigue test. Firstly, the DCT fracture test was conducted, and the toughness index (TI) was used to evaluate the low temperature cracking ability. Secondly, the fatigue test was conducted on different asphalt mixtures, and using S-VECD model to determine the Damage Characteristic Curve (C-S) and Energy-based failure criterion with experimental cycles to failure (G R -N f ). Two tests show that with RAP content increase, the low temperature and fatigue cracking property of asphalt mixtures decrease, which means that RAP content should be controlled in the future application.

ACS Style

Yuefeng Zhu; Xingju Wang; Yaning Qiao; Jiang Shu. Thermal Cracking and Fatigue Analysis of Recycled Asphalt Mixture Using DCT Test and S-VECD Model. Proceedings of GeoShanghai 2018 International Conference: Transportation Geotechnics and Pavement Engineering 2018, 483 -492.

AMA Style

Yuefeng Zhu, Xingju Wang, Yaning Qiao, Jiang Shu. Thermal Cracking and Fatigue Analysis of Recycled Asphalt Mixture Using DCT Test and S-VECD Model. Proceedings of GeoShanghai 2018 International Conference: Transportation Geotechnics and Pavement Engineering. 2018; ():483-492.

Chicago/Turabian Style

Yuefeng Zhu; Xingju Wang; Yaning Qiao; Jiang Shu. 2018. "Thermal Cracking and Fatigue Analysis of Recycled Asphalt Mixture Using DCT Test and S-VECD Model." Proceedings of GeoShanghai 2018 International Conference: Transportation Geotechnics and Pavement Engineering , no. : 483-492.