Synthesis for Quantification of Binder Availability in Recycled Materials
| 项目名称： | Synthesis for Quantification of Binder Availability in Recycled Materials |
| 摘要： | Increasing recycled materials content in asphalt mixtures provides economic and environmental benefits, but each unique materials combination of virgin and recycled materials and additives must be engineered to ensure adequate performance with proper selection of component materials, balanced proportioning, and consideration of recycled binder availability. The design of mixtures with recycled materials often assumes that 100 percent of the recycled binder is available to blend with the virgin binder, and the virgin binder content is reduced accordingly. In reality, when recycled binder availability is less than 100 percent for heavily aged materials, total binder contents are less than optimum from mix design, resulting in dry mixtures with insufficient coating and inadequate durability and cracking performance. In addition, recycled binder availability can be used to assess aging state and preclude the use of large quantities of these materials with stiff, brittle binders that contribute negatively to performance even if available. The Performing Agency will address these concerns and revise TxDOT’s Standard and/or Special Specifications to incorporate recycled binder availability as part of mix design and revise the allowable maximum recycled binder ratio (RBR) limits as appropriate in a synthesis project based only on literature and available data. |
| 状态： | Completed |
| 资金： | $64988 |
| 资助组织： | Texas Department of Transportation<==>Federal Highway Administration |
| 项目负责人： | Glancy, Chris |
| 执行机构： | Texas Transportation Institute |
| 开始时间： | 20191101 |
| 预计完成日期： | 20201031 |
| 实际结束时间： | 20201031 |
| 主题领域： | Construction；Materials |
相关文献
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- Synthesis of Information Related to Highway Practices. Topic 52-17. Use of Recycling Agents in Asphalt Concrete Mixtures
- Capturing Durability of High Recycled Binder Ratio (RBR) Asphalt Mixtures
- Performance Characteristics of Modern Recycled Asphalt Mixes in Missouri, Including Ground Tire Rubber, Recycled Roofing Shingles, and Rejuvenators
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