Development of a Standard Test Method for Characterization of Asphalt Modifiers and Aging-Related Degradation Using an Extensional Rheometer
| 项目名称： | Development of a Standard Test Method for Characterization of Asphalt Modifiers and Aging-Related Degradation Using an Extensional Rheometer |
| 摘要： | This study has been initiated to (a) Characterize modified asphalt binders in relation to their aging-related degradation; (b) develop a new standard and specification to supplement the knowledge gap in the performance grade (PG) system for modified asphalt binders. In the proposed study, an extensional rheometer fixture will be used in a DSR platform to perform a suite of tests. Elongation tests and fracture tests will be performed using the extensional rheometer varying sample geometry, temperature, and strain rate. To replace ductility test (American Association of State Highway and Transportation Officials [AASHTO] T51), final strain in elongation test will be analyzed along with other parameters. Second force peak of force ductility test (AASHTO T300) will be compared to second force peak in elongation test. A novel and direct low temperature cracking susceptibility test will be developed by analyzing fracture strength and fracture energy parameters in fracture test using extensional rheometer. Extensional stress relaxation modulus and strain hardening will be investigated to determine the influence of polymer microstructures such as linear and radial styrene-butadiene-styrene (SBS). The proposed study will also investigate and quantify (a) the degradation of modifiers with aging, and (b) how polymers/modifiers influence aging susceptibility. A standard test method and corresponding specifications will be developed for immediate implementation. |
| 状态： | Completed |
| 资金： | 108000 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 管理组织： | Transportation Consortium of South-Central States |
| 项目负责人： | Hassan, Marwa M |
| 执行机构： | Louisiana Transportation Research Center |
| 主要研究人员： | Wasiuddin, Nazimuddin M |
| 开始时间： | 20170508 |
| 预计完成日期： | 20181108 |
| 实际结束时间： | 20181108 |
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