Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions
Water damage is one of the major distresses of asphalt pavements. Existing methods for investigating the water stability of asphalt mixtures rely primarily on static water test methods, the tensile strength ratio (TSR) test, and the retained Marshall stability (RMS) test, which evaluate the strength...
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| Format: | Article |
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MDPI AG
2024-03-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/17/6/1304 |
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| author | Yue Xiao Tianlei Wang Zongwu Chen Chao Li Feng Wang |
| author_facet | Yue Xiao Tianlei Wang Zongwu Chen Chao Li Feng Wang |
| author_sort | Yue Xiao |
| collection | DOAJ |
| description | Water damage is one of the major distresses of asphalt pavements. Existing methods for investigating the water stability of asphalt mixtures rely primarily on static water test methods, the tensile strength ratio (TSR) test, and the retained Marshall stability (RMS) test, which evaluate the strength and stability loss after freeze-thaw damage or hot water immersion, respectively. However, these methods do not accurately replicate the actual dynamic water damage conditions to pavement. Therefore, in this study, a variety of damage conditions, including static water conditions and dynamic water pressure conditions, were used to investigate the effects of lignin fibers (LFs), polyester fibers (PFs), and polypropylene fibers (PPFs) on the water stability of asphalt mixtures. First, three fibers-enhanced SMA gap-gradation asphalt mixtures were designed. Then, TSR and RMS were measured under traditional static water damage conditions and new dynamic water pressure damage conditions to evaluate the effect of fiber types on the water stability of asphalt mixtures. Finally, the void rate of asphalt mixtures and its changes under dynamic water damage conditions were further revealed with the help of CT scanning technique. Results showed that, among these three types of fibers, PFs-enhanced asphalt mixture exhibited excellent stability under both static and dynamic water conditions, and the CT scanning test also indicated that the PFs can significantly reduce the increase rate of voids in asphalt mixtures after dynamic water pressure damage. This study identified the potential of incorporating suitable type of fiber to enhance the performance of asphalt mixture under dynamic water pressure damage. |
| first_indexed | 2024-04-24T18:03:24Z |
| format | Article |
| id | doaj.art-6c929453cd534064a104070bb988cb2c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-24T18:03:24Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-6c929453cd534064a104070bb988cb2c2024-03-27T13:52:28ZengMDPI AGMaterials1996-19442024-03-01176130410.3390/ma17061304Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage ConditionsYue Xiao0Tianlei Wang1Zongwu Chen2Chao Li3Feng Wang4State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, ChinaState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, ChinaFaculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, ChinaState Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, ChinaSchool of Materials Science and Engineering, Chang’an University, Xi’an 710061, ChinaWater damage is one of the major distresses of asphalt pavements. Existing methods for investigating the water stability of asphalt mixtures rely primarily on static water test methods, the tensile strength ratio (TSR) test, and the retained Marshall stability (RMS) test, which evaluate the strength and stability loss after freeze-thaw damage or hot water immersion, respectively. However, these methods do not accurately replicate the actual dynamic water damage conditions to pavement. Therefore, in this study, a variety of damage conditions, including static water conditions and dynamic water pressure conditions, were used to investigate the effects of lignin fibers (LFs), polyester fibers (PFs), and polypropylene fibers (PPFs) on the water stability of asphalt mixtures. First, three fibers-enhanced SMA gap-gradation asphalt mixtures were designed. Then, TSR and RMS were measured under traditional static water damage conditions and new dynamic water pressure damage conditions to evaluate the effect of fiber types on the water stability of asphalt mixtures. Finally, the void rate of asphalt mixtures and its changes under dynamic water damage conditions were further revealed with the help of CT scanning technique. Results showed that, among these three types of fibers, PFs-enhanced asphalt mixture exhibited excellent stability under both static and dynamic water conditions, and the CT scanning test also indicated that the PFs can significantly reduce the increase rate of voids in asphalt mixtures after dynamic water pressure damage. This study identified the potential of incorporating suitable type of fiber to enhance the performance of asphalt mixture under dynamic water pressure damage.https://www.mdpi.com/1996-1944/17/6/1304asphalt mixturedynamic water pressurefibervoid rate |
| spellingShingle | Yue Xiao Tianlei Wang Zongwu Chen Chao Li Feng Wang Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions Materials asphalt mixture dynamic water pressure fiber void rate |
| title | Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions |
| title_full | Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions |
| title_fullStr | Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions |
| title_full_unstemmed | Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions |
| title_short | Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions |
| title_sort | water stability of fibers enhanced asphalt mixtures under static and dynamic damage conditions |
| topic | asphalt mixture dynamic water pressure fiber void rate |
| url | https://www.mdpi.com/1996-1944/17/6/1304 |
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