Investigating Merits of Bio-Rejuvenation to Extend Pavement Service Life
| 项目名称： | Investigating Merits of Bio-Rejuvenation to Extend Pavement Service Life |
| 摘要： | The overall goal of this project is to extend pavement service life by applying timely preventive and corrective low-cost maintenance approach. As a step toward this goal, the specific objective of the project is to use bio-rejuvenation as a means of restoring aged asphalt pavement properties. The research team mainly starts counting pavement age after pavement placement and compaction is done, however, it should be noted that aging also occurs during plant mixing which promotes chemical imbalance within asphalt colloidal structure. The research hypothesis is that by applying bio-rejuvenator at periodic intervals during pavement life, one can restore the chemical balance of asphalt (asphaltene/maltene ratio) which is critical to maintain an adequately ductile pavement. This, in turn, would ensure pavement proper release of stress to prevent stress accumulation. It should be noted that when the pavement surface appears weathered and crusted, it has already lost its ductility and compliance capacity, this, in turn, would reduce pavement ability to release stress giving rise to stress accumulation due to traffic and environmental loading. When the stress level exceeds pavements� ultimate strength, cracks initiate and continue to propagate compromising pavement integrity and performance. |
| 状态： | Active |
| 资金： | 139329 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 管理组织： | Michigan State University - Center for Pavement Preservation |
| 执行机构： | North Carolina A&T State University |
| 主要研究人员： | Fini, Elham H |
| 开始时间： | 20170131 |
| 预计完成日期： | 20180130 |
| 实际结束时间： | 0 |
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