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Field Verification of Proposed Changes to the AASHTO R 30 Procedures for Laboratory Conditioning of Asphalt Mixtures
| 题名： | Field Verification of Proposed Changes to the AASHTO R 30 Procedures for Laboratory Conditioning of Asphalt Mixtures |
| 责任者： | National Academies of Sciences, Engineering, and Medicine; Transportation Research Board; National Cooperative Highway Research Program; David Newcomb, Edith Arámbula-Mercado, Amy Epps Martin, Mengge Yuan, Texas A&M Transportation Institute; Nam Tran, Fan Yin, National Center for Asphalt Technology |
| 关键词： | Transportation and Infrastructure — Materials Transportation and Infrastructure — Pavements |
| 学科分类： | 暂无分类 |
| 摘要： | Laboratory conditioning of asphalt mixtures during the mix design process to simulate their short-term aging influences the selection of the optimum asphalt content. In addition, long-term conditioning affects the mixture and binder stiffness, deformation, and strength evaluated with fundamental characterization tests to assess mixture performance. The current standard conditioning procedure, AASHTO R 30, Standard Practice for Mixture Conditioning of Hot-Mix Asphalt, was developed over two decades ago. In reviewing whether to update the standard, TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 919: Field Verification of Proposed Changes to the AASHTO R 30 Procedures for Laboratory Conditioning of Asphalt Mixtures seeks to (a) develop a laboratory short-term aging protocol to simulate the aging and asphalt absorption of an asphalt mixture during production and transportation based on factors thought to affect aging, and (b) develop a laboratory longer-term aging protocol to simulate the aging of the asphalt mixtures after construction. The key outcome of the research is that the current long-term oven aging (LTOA) procedure in AASHTO R 30 is not realistic. Replacing the aging of a compacted specimen with aging of loose mix for 5 days at 85°C (185°F) before compaction for testing should be considered by the AASHTO Committee on Materials and Pavements. |
| 出版机构： | Transportation Research Board |
| 提交日期： | 2019 |
| 报告类型： | 科技报告 |
| 资源类型： | 科技（咨询、行业）报告 |
| 初始创建时间： | 2019 |
相关文献
- Short-Term Laboratory Conditioning of Asphalt Mixtures
- Long-Term Aging of Asphalt Mixtures for Performance Testing and Prediction
- Field Validation of Laboratory Tests to Assess Cracking Resistance of Asphalt Mixtures: An Experimental Design
- Improved Mix Design, Evaluation, and Materials Management Practices for Hot Mix Asphalt with High Reclaimed Asphalt Pavement Content
- Mix Design Practices for Warm-Mix Asphalt
- Ruggedness of Laboratory Tests for Asphalt Mixture Cracking Resistance
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