Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of polyisobutylene on low-temperature thermoreversible aging properties in asphalt binders
https://orcid.org/0000-0001-6288-230X
https://orcid.org/0000-0002-2250-5363
Abstract In order to study the influence of polyisobutylene (PIB) on pavement performance of asphalt binders, two asphalt binders with large differences in wax content and the similar performance grades were selected as the base asphalt binders, and three kinds of waxes and PIB were selected as additives. Extended bending beam rheometer (Ex-BBR) test, double-edge-notched tension (DENT) test, multiple stress creep recovery (MSCR) test and rotational viscosity test were used to study the effect of PIB on the low, medium and high temperature properties of asphalt binders, respectively. The phase transition pattern of PIB when interacting with waxes was analyzed by variable temperature polarizing microscope (VT-PLM). The results show that PIB can be miscible with waxes and reduce the melting point of waxes by about 20∼60%. PIB can improve the low-temperature performance (reducing creep stiffness), medium-temperature performance (increasing toughness and fracture resistance), high-temperature performance (improving high-temperature deformation resistance and deformation recovery ability) and workability (reducing mixing and compaction temperature) of asphalt binders (including high-wax and wax-based warm-mixed asphalt binders). It is worth noting that PIB will aggravate the thermoreversible aging (the results of P-value analysis showed that PIB had a significant effect on the grade loss (GL) of asphalt binders), which will affect the low-temperature performance of asphalt binders during the isothermal low-temperature storage, resulting in premature damage to the pavement.
Highlights PIB lowers the melting point of waxes by 20–60%. PIB causes more waxes to precipitate at low temperatures. PIB aggravates the thermoreversible aging in asphalt binder. PIB increases the toughness and fracture resistance of asphalt binders. PIB reduces the mixing and compaction temperatures of asphalt binders.
Effect of polyisobutylene on low-temperature thermoreversible aging properties in asphalt binders
https://orcid.org/0000-0001-6288-230X
https://orcid.org/0000-0002-2250-5363
Abstract In order to study the influence of polyisobutylene (PIB) on pavement performance of asphalt binders, two asphalt binders with large differences in wax content and the similar performance grades were selected as the base asphalt binders, and three kinds of waxes and PIB were selected as additives. Extended bending beam rheometer (Ex-BBR) test, double-edge-notched tension (DENT) test, multiple stress creep recovery (MSCR) test and rotational viscosity test were used to study the effect of PIB on the low, medium and high temperature properties of asphalt binders, respectively. The phase transition pattern of PIB when interacting with waxes was analyzed by variable temperature polarizing microscope (VT-PLM). The results show that PIB can be miscible with waxes and reduce the melting point of waxes by about 20∼60%. PIB can improve the low-temperature performance (reducing creep stiffness), medium-temperature performance (increasing toughness and fracture resistance), high-temperature performance (improving high-temperature deformation resistance and deformation recovery ability) and workability (reducing mixing and compaction temperature) of asphalt binders (including high-wax and wax-based warm-mixed asphalt binders). It is worth noting that PIB will aggravate the thermoreversible aging (the results of P-value analysis showed that PIB had a significant effect on the grade loss (GL) of asphalt binders), which will affect the low-temperature performance of asphalt binders during the isothermal low-temperature storage, resulting in premature damage to the pavement.
Highlights PIB lowers the melting point of waxes by 20–60%. PIB causes more waxes to precipitate at low temperatures. PIB aggravates the thermoreversible aging in asphalt binder. PIB increases the toughness and fracture resistance of asphalt binders. PIB reduces the mixing and compaction temperatures of asphalt binders.
Effect of polyisobutylene on low-temperature thermoreversible aging properties in asphalt binders
https://orcid.org/0000-0001-6288-230X
https://orcid.org/0000-0002-2250-5363
Abstract In order to study the influence of polyisobutylene (PIB) on pavement performance of asphalt binders, two asphalt binders with large differences in wax content and the similar performance grades were selected as the base asphalt binders, and three kinds of waxes and PIB were selected as additives. Extended bending beam rheometer (Ex-BBR) test, double-edge-notched tension (DENT) test, multiple stress creep recovery (MSCR) test and rotational viscosity test were used to study the effect of PIB on the low, medium and high temperature properties of asphalt binders, respectively. The phase transition pattern of PIB when interacting with waxes was analyzed by variable temperature polarizing microscope (VT-PLM). The results show that PIB can be miscible with waxes and reduce the melting point of waxes by about 20∼60%. PIB can improve the low-temperature performance (reducing creep stiffness), medium-temperature performance (increasing toughness and fracture resistance), high-temperature performance (improving high-temperature deformation resistance and deformation recovery ability) and workability (reducing mixing and compaction temperature) of asphalt binders (including high-wax and wax-based warm-mixed asphalt binders). It is worth noting that PIB will aggravate the thermoreversible aging (the results of P-value analysis showed that PIB had a significant effect on the grade loss (GL) of asphalt binders), which will affect the low-temperature performance of asphalt binders during the isothermal low-temperature storage, resulting in premature damage to the pavement.
Highlights PIB lowers the melting point of waxes by 20–60%. PIB causes more waxes to precipitate at low temperatures. PIB aggravates the thermoreversible aging in asphalt binder. PIB increases the toughness and fracture resistance of asphalt binders. PIB reduces the mixing and compaction temperatures of asphalt binders.
Effect of polyisobutylene on low-temperature thermoreversible aging properties in asphalt binders
Liu, Meifang (Autor:in) / Su, Bo (Autor:in) / Ding, Haibo (Autor:in) / Feng, Xiongkai (Autor:in) / Qiu, Yanjun (Autor:in)
01.12.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Thermoreversible aging in asphalt binders
| Taylor & Francis Verlag | 2024
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