Accelerated Aging of Asphalt by UV-Oxidation
| 项目名称： | Accelerated Aging of Asphalt by UV-Oxidation |
| 摘要： | One of the primary mechanisms in which asphalt binder and asphalt pavement undergoes aging is oxidation. Oxidative aging can be categorized as either thermal oxidation, which occurs primarily during mixing, transporting, and placement, or ultra violent (UV) oxidation which occurs throughout the lifetime of the pavement due to solar irradiance. This project aims to further investigate the UV-oxidation of asphalt binder. Through experimental tests on thin asphalt binder specimens and an analytical investigation of actual in-field UV-irradiance measurements, a link will be made between laboratory accelerated aging due to UV-oxidation and in-service aging that occurs during the service life of a pavement. UV fluorescent lamps will be used to expose thin asphalt binder samples to UV radiation and the extent of UV-oxidation will be evaluated using a rotational viscometer. As asphalt binder oxidizes it begins to stiffen due to the formation of new functional groups including carbonyls and sulfoxides. This chemical change significantly alters the asphalt binder�s rheological properties, including an increase in the viscosity which leads to a higher susceptibility to fatigue cracks and pavement deterioration |
| 状态： | Completed |
| 资金： | 23663 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 管理组织： | University Transportation Research Center |
| 项目负责人： | Eickemeyer, Penny |
| 执行机构： | Manhattan College |
| 主要研究人员： | Hochstein, Daniel |
| 开始时间： | 20160901 |
| 预计完成日期： | 20180331 |
| 实际结束时间： | 0 |
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