Testing and Evaluation of RAP and RAS on Experimental Pavement Sections
| 项目名称： | Testing and Evaluation of RAP and RAS on Experimental Pavement Sections |
| 摘要： | This is a continuation of the research conducted under project 0-6682. Validation of the Maximum Allowable Amounts of Recycled Binder, recycled asphalt pavement (RAP) & recycled asphalt shingles (RAS) Using Accelerated Pavement Testing. In February 2013, 12 flexible pavement test sections were constructed for accelerated pavement testing (APT) through this project using Texas mixes in typical Texas Department of Transportation (TxDOT) pavement structures. Two sections were tested to failure in the period from March 15 to May I, 20l4. APT testing will be conducted on the remaining 10 test sections in order to validate the cracking and rutting potential of both control and RAP and RAS modified mixes. These key issues will be evaluated in this project: (1) Validate that poor results on lab prepared RAP and RAS samples translate to poor field performance under axle loads. Industry groups claim the lab studies do not simulate plant produced mixes; (2) Validate overlay design tools that have recently been developed by Texas A&M Transportation Institute (TTI) to predict mix cracking and rutting of new overlays. These models will be validated and calibrated for RAP and RAS mixes. Having a validated design system will then permit TxDOT designers to predict the performance of mixes containing different RAP and RAS levels for a range of existing pavement types with different pavement structures and different pre-existing cracking levels; and (3) Determine if the proposed balanced mix design procedures, which incorporate both a cracking and rutting evaluation in the lab design phase, can be used to design RAP and RAS mixes with performances comparable to virgin mixes. |
| 状态： | Completed |
| 资金： | 493931.00 |
| 资助组织： | Texas Department of Transportation |
| 项目负责人： | Odell, Wade |
| 执行机构： | University of Texas, Arlington |
| 开始时间： | 20140725 |
| 实际结束时间： | 20150831 |
| 主题领域： | Construction；Highways；Maintenance and Preservation；Pavements；I30: Materials |
相关文献
- Develop Guidelines and Design Program for Hot-Mix Asphalts Containing RAP, RAS, and Other Additives through a Balanced Mix-Design Process
- The Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios
- Evaluating Recycling Agents’ Acceptance for Virginia: Test Protocols and Performance-Based Threshold Criteria
- PPRC14 SPE 4.51B: Binder Replacement in High RAP/RAS Asphalt Mixes (Phase 2: Accelerated Pavement Testing and Field Monitoring)
- Resistance of Asphalt Mixes with Recycled Materials to Withstand Extreme Temperatures
- Synthesis of Information Related to Highway Practices. Topic 52-17. Use of Recycling Agents in Asphalt Concrete Mixtures
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