Article
Construction & Building Technology
Wei Jiang, Rui Bao, Hao Lu, Dongdong Yuan, Rong Lu, Aimin Sha, Jinhuan Shan
Summary: This study investigated the impacts of different aging conditions on bitumen performance, molecular composition, and components, showing that different aging modes have varying effects on bitumen rheological properties. The RTFOT + PAV aging mode had the greatest influence on functional groups.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Xiaolong Yang, Chunhong Peng, Jiangcai Chen, Guiyong Liu, Xinyi He
Summary: By analyzing the rheological properties of bio-asphalt, the effectiveness of bio-asphalt as a substitute for petroleum asphalt has been explored. The addition of bio-asphalt improves the low-temperature rheological properties of modified asphalt while reducing the high-temperature rheological properties. The combination of bio-asphalt, SBS, and PPA exhibits excellent performance in high and low-temperature conditions. This study reveals the mechanism of bio-asphalt improving the compatibility of SBS and PPA in asphalt.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Xianyan Luo, Kaizhong Xie, Shengbing Zhao, Qi Yao, Yue Qin
Summary: This study investigated the variations and relationships between molecular components and rheological properties of SBS-modified asphalt during long-term aging under the influence of moisture. The results showed that moisture facilitated asphalt aging, complicating the aging behavior. Moisture led to a decrease in resin content, weakening the fatigue and self-healing properties of asphalt. There were significant correlations between asphalt molecular components and rheological properties. This study contributes to a better understanding of the influence of moisture on the thermal-oxidative aging of asphalt.
Article
Chemistry, Physical
Shanglin Song, Meichen Liang, Linbing Wang, Dongna Li, Meng Guo, Luchun Yan, Xingjun Zhang, Weixun Ding
Summary: This study reveals the evolution law of natural aging of SBS-modified asphalt under the complex adverse climate environment in cold and arid regions, and analyzes the contribution rates of various environmental factors. The results show that natural aging deteriorates the viscoelastic properties of asphalt, increases the risk of fatigue cracking and low temperature cracking, but improves the deformation resistance and rutting resistance at high temperature.
Article
Construction & Building Technology
S. C. Some, A. B. Kouevidjin, V. Mouillet, A. Feeser, J. -F Barthelemy, H. Ben Dhia
Summary: The study assessed the effects of short and long-term thermo-oxidative aging on various properties of asphalt concretes. A modified aging procedure was used to evaluate the changes in properties over time. The impact of long-term aging on the chemo-rheological properties of asphalt binders was also investigated. At the binder scale, there was an increase in certain properties and a decrease in penetration grade with aging. At the mixture scale, the stiffness modulus increased while other properties decreased with aging. Correlations between the aging index and various properties were proposed.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Han Liu, Qingshan Xie, Haibo Ding, Hong Zhang, Yanjun Qiu
Summary: This study investigated the effects of three kinds of pure wax on the rheological properties of asphalt binder. The results showed that waxes have varying influences on the high-temperature rutting, medium temperature fatigue, and low-temperature thermoreversible aging of asphalt.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Polymer Science
Lei Xia, Dongwei Cao, Hongliang Zhang
Summary: This study investigated the rheological and aging properties of vegetable oil-based polyurethane (V-PU) modified asphalt. The results showed that the addition of V-PU significantly improved the modulus, creep recovery rate, yield stress, and yield strain of the modified asphalts. The high temperature grade of the V-PU modified asphalt was also increased. FTIR, GPC, and fluorescence microscopy analyses revealed that the molecular weight increased and V-PU molecules agglomerated after aging. The excess -NCO groups of V-PU reacted with water and active hydrogen in the asphalt system, forming a cross-linked three-dimensional network structure to enhance performance.
Article
Construction & Building Technology
Hongjie Hao, Zhihui Chen, Peiliang Cong, Zhiyu Han
Summary: The waste polyurethane (WPU) particles are used to modify asphalt binder in order to obtain modified asphalt binders with excellent properties. The addition of WPU particles improves the low temperature crack resistance of the base asphalt binder but impairs the property of SBS modified asphalt binder. The thermal storage stability of the WPU particles modified asphalt binder is poor but can be improved by using SBS. The rod-shaped WPU particles enhance the rutting resistance of the asphalt binder, however, their structure is destroyed during aging process.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Seyed Reza Omranian, David Hernando, Ali Arab, Meor Othman Hamzah, Choong Kok Keong, Cedric Vuye, Wim Van den Bergh
Summary: This study validated the empirical approach proposed by Shalaby to model short-term aging of asphalt binders, showing that it can accurately predict the effects of aging duration and temperature on binder performance.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Heena Dhasmana, Kamal Hossain, Ahmet S. Karakas
Summary: The use of recycled asphalt products in asphalt concrete pavements is increasing for sustainability, but the aged binder can negatively impact pavement performance. To improve performance, rejuvenators are added to change the rheological properties of the asphalt mixtures. The study focuses on evaluating the performance of asphalt mixes with added rejuvenators in aged binders, showing a correlation between rejuvenator types and dosage with asphalt binder ageing.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Article
Chemistry, Physical
Krzysztof Kolodziej, Leslaw Bichajlo, Tomasz Siwowski
Summary: This study investigated the effects of short-term aging on the physical and rheological characteristics of 35/50 base bitumen modified by two different Trinidad Lake Asphalt (TLA) contents. The results showed that short-term aging did not worsen or reduce the pavement resistance to permanent deformation or the load-bearing capacity of the asphalt mixture for TLA-modified binders.
Article
Materials Science, Multidisciplinary
Keyan Liu, Yongli Xu, Dapeng Gao, Songhan Yang
Summary: This study comprehensively explored the long-term durability of asphalt mixed with an anti-stripping agent through laboratory tests and comparisons. The results showed that the anti-aging ability of the asphalt with the anti-stripping agent was better than that of base asphalt and slightly worse than that of SBS modified asphalt. Additionally, the modulus of asphalt is more affected by temperature than aging.
Article
Engineering, Civil
Ding Jitong, Jiang Jiwang, Ni Fujian, Xie Shengjia
Summary: This study investigates the effects of long-term aging protocols on critical rheological and chemical parameters of binders in laboratory and field conditions. Five laboratory aging protocols and statistical analyses were used to evaluate the rheological and chemical properties of the aged binders. The loose-mix aging in the range of 70-95 degrees Celsius was found to be closer to the in situ aging trend. The results of this study can assist in material selection, mixture design, and maintenance operations of asphalt pavements.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Construction & Building Technology
Mahmoud Enieb, Aboelkasim Diab, Xu Yang
Summary: This study investigated the short- and long-term aged properties of glass fibre-reinforced asphalt mixtures, showing that longer fibres did not significantly affect the properties compared to shorter fibres. The orientation and concentration of glass fibre were found to have a noticeable influence on the mechanical response of the composite, with the potential to enhance durability of asphalt mixtures.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Article
Construction & Building Technology
Fang Liu, Panpan Liu, Xiao Zhang, Zhidong Zhou, Yijun Peng
Summary: This study investigates the aging properties of rejuvenated asphalt binders. The results show that the carbonyl index of the rejuvenated binders and original binder increase rapidly during the fast-aging state and then slowly during the constant-aging state, while the aged binder increases approximately linearly. Additionally, some rheological properties indexes of the binders exhibit similar or opposite variation trends to the carbonyl index during aging.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
