Viability Assessment and Cost Benefit Analysis of Using Reclaimed Asphalt Pavement (RAP) in Unbound Pavement Layers in Louisiana
| 项目名称： | Viability Assessment and Cost Benefit Analysis of Using Reclaimed Asphalt Pavement (RAP) in Unbound Pavement Layers in Louisiana |
| 摘要： | In Region 6, Portland cement is widely used in pavement construction to stabilize soil and base layers. When Portland cement is blended and compacted with soil and water, a hydration process and chemical alteration of the soil takes place. The hydration process forms a paste, which acts as a glue to hold the soil particles together. Once this mixture hardens, it forms a rigid material, which is durable and resistant to rutting. Unfortunately, this mixture also causes the material to contract, producing shrinkage and reflective cracks. Consequently, in Louisiana, many roadways previously constructed with soil cement have experienced severe shrinkage and reflective cracks, which caused premature roadway failures and is aesthetically unappealing to the traveling public. Therefore, it would be beneficial to South-Central States, including Louisiana, to identify alternative modifiers to substitute for Portland cement in soil and base layers in the future. One of these potential promising alternatives is using Reclaimed Asphalt Pavement (RAP) to strengthen the unbound pavement layers (base/subbase course and subgrade). As such, this project will determine whether RAP in Louisiana could be utilized in unbound layers, including base, subbase, and subgrade and will also determine the optimum RAP content while conforming to current Louisiana Department of Transportation and Development (LaDOTD) specifications. |
| 状态： | Active |
| 资金： | 46896 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 管理组织： | Transportation Consortium of South-Central States (Tran-SET) |
| 项目负责人： | Dhasmana, Heena |
| 执行机构： | Louisiana State University, Baton Rouge |
| 主要研究人员： | Dhasmana, Heena |
| 开始时间： | 20220401 |
| 主题领域： | Highways；Maintenance and Preservation；Materials；Pavements |
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