Assessment of Compatibility of Mineral Aggregates and Binders Used in Highway Construction and Maintenance Projects
| 项目名称： | Assessment of Compatibility of Mineral Aggregates and Binders Used in Highway Construction and Maintenance Projects |
| 摘要： | The Arkansas Department of Transportation (ArDOT) has raised issues with the use of certain aggregates in asphalt concrete projects (both new and maintenance) as these aggregates pose serious durability and performance issues. In particular, aggregates originating from some quarries are suspected to be problematic and non-compatible with some asphalt products (e.g., hot mix asphalt and chip seals). The non-compatibility issues of these aggregates can be mitigated by selecting appropriate asphalt binder(s) as they can be acidic or basic based on their crude sources (e.g., Arabian and Canadian crude). The proposed study will seek to identify the problematic aggregates and their compatible asphalt binders through mechanistic and science-based approaches. Physical (e.g., absorption) and mechanical properties (e.g., abrasion resistance and sulfate resistance) of aggregates will be evaluated in the laboratory. The compatibility of these aggregates with different binder sources will be determined by measuring their surface free energy (SFE) and adhesion forces by using an Optical Contact Angle (OCA) Analyzer and an Atomic Force Microscope (AFM), respectively. A comprehensive database of compatible aggregate-binder systems will be developed, and it can be followed by asphalt contractors to choose the best compatible system to build longer lasting roadways. |
| 状态： | Completed |
| 资金： | 102013 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 项目负责人： | Melson, Christopher |
| 执行机构： | Arkansas State University |
| 开始时间： | 20190815 |
| 预计完成日期： | 20210215 |
| 主题领域： | Construction；Highways；Maintenance and Preservation；Materials；Pavements |
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