RES2023-15: Investigating the Long-Term Frictional Properties and
Establishing Aggregate Polishing Guidelines for Asphalt
Surface Mixtures in Tennessee
| 项目名称： | RES2023-15: Investigating the Long-Term Frictional Properties and Establishing Aggregate Polishing Guidelines for Asphalt Surface Mixtures in Tennessee |
| 摘要： | The skid resistance of asphalt mixtures is characterized by micro and macro textures. The macro-texture is related to gradation, density, shape, angularity, and arrangement of aggregates within the mixture layer. The micro-texture is associated with the polishing properties of aggregates at the mixture surface. Tennessee Department of Transportation (TDOT) controls the micro-texture of surface asphalt mixtures by requiring a minimum of 75% of siliceous aggregates. However, this requirement is based on experience only. In addition, the routine use of reclaimed asphalt pavement (RAP) poses new challenges due to the unknown amount of siliceous materials in the RAP materials. Therefore, it is imperative to address and optimize the friction of surface mixtures in Tennessee. Additionally, some regions of Tennessee experience high costs for importing polish resistant aggregates for asphalt surface mixtures. The lack of locally available polish-resistant aggregate sources can require contractors to haul polish-resistant aggregates at a great expense. |
| 状态： | Active |
| 资金： | 200,000.00 |
| 资助组织： | Tennessee Department of Transportation |
| 管理组织： | Tennessee Department of Transportation |
| 执行机构： | University of Tennessee, Knoxville |
| 主要研究人员： | Huang, Baoshan |
| 开始时间： | 20220801 |
| 预计完成日期： | 20240731 |
| 主题领域： | Highways；Materials；Pavements |
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