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Methods of Rehabilitating Pavements with Moisture Damaged Asphalt Layers: Technical Report.
| 题名： | Methods of Rehabilitating Pavements with Moisture Damaged Asphalt Layers: Technical Report. |
| 作者： | Im, S.; Sebesta, S.; Rew, Y. |
| 关键词： | Hot mix asphalt (HMA), Pavement recycling, Reclaimed asphalt pavement (RAP), Pavement performance analysis, Cold in-place recycling (CIR), Cold central-plant recycling (CCPR), Material properties, Surface cracking, Texas Department of Transportation (TxDOT) |
| 摘要： | Moisture damage to old hot mix asphalt layers can result in surface cracking and greatly reduce the life of any new asphalt overlay. Buried moisture damage, generally called stripping, in asphalt layers can often go undetected, resulting in new overlays not reaching their design life. Conventional wisdom is to mill down to solid HMA and then place full depth new HMA. This strategy is costly and means that several inches of good materials will be sent to reclaimed asphalt pavement stockpiles. Recent developments for cold in-place recycling (CIR) and cold central-plant recycling (CCPR) technologies can be considered for addressing moisture-damaged asphalt layers by recycling the existing material in place to create a structurally sound asphalt treated base layer. Through a thorough literature review, field sampling and testing, a comprehensive lab study, and evaluation of pavement design alternatives, this project identified lab methods to determine treatment options, documented binder type and temperature influences on material properties, used lab properties to predict pavement performance, and recommended special specification updates for use on future CIR or CCPR projects. These methods and specification updates should be considered to explore developing recycling options for identified moisture-damaged pavement sections. |
| 报告类型： | 科技报告 |
相关文献
- Methods of Rehabilitating Pavements with Moisture Damaged Asphalt Layers, Project Summary.
- Moisture Damage to Hot-Mix Asphalt Mixtures: Synopsis of a Workshop. Held in Washington, DC on January 22, 2012.
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