DSR-based Test Procedures and Specification Guidelines for Grading PG58-XX and PG64S-XX Asphalt Binders in the State of Kansas
| 项目名称： | DSR-based Test Procedures and Specification Guidelines for Grading PG58-XX and PG64S-XX Asphalt Binders in the State of Kansas |
| 摘要： | Application of the MSCR test in grading and grade adjustment of modified asphalt binders has gained popularity in recent years. Two separate parameters are determined from the MSCR test, namely: non-recoverable creep compliance (Jnr) and percentage of recovery (MSCR %R). The Jnr value indicates the rutting resistance of asphalt binders while MSCR %R represents the capability of binders to relax stresses and recover strains. While there is a consensus among the pavement community that the MSCR test parameters can be used effectively for specification of modified binders, it disregards asphalt binders that have relatively high non-recoverable compliance, Jnr, and states that those binders must be used without modification and the MSCR %R criteria must be waived. Interestingly, a wide variety of modified and current asphalt binders used in the state of Kansas (e.g., PG64S-XX and PG58-XX binders) does not satisfy the Jnr criteria and therefore are disregarded and not included in the specification system. There is a clear need to investigate how the MSCR and other DSR-based test parameters should be applied for grading and grade adjustment of these binders. This research proposal aims at development of clear guidelines on how to test and characterize modified PG64S-XX and current PG58-XX binders used in the state of Kansas. |
| 状态： | Active |
| 资金： | 58,962 |
| 资助组织： | University of Kansas, Lawrence |
| 管理组织： | Kansas Department of Transportation |
| 项目负责人： | Heptig, Blair |
| 执行机构： | University of Kansas, Lawrence |
| 主要研究人员： | Darabi, Masoud K |
| 开始时间： | 20170701 |
| 预计完成日期： | 20190930 |
| 实际结束时间： | 0 |
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