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Evaluation of Specialized Hot Mix Asphalt Mixes for Massachusetts.
| 题名： | Evaluation of Specialized Hot Mix Asphalt Mixes for Massachusetts. |
| 作者： | Mogawer, W. S.; Austerman, A. J. |
| 关键词： | Warm Mix Asphalt (WMA), Ground tire rubber (GTR), Hot mix asphalt (HMA), Reclaimed asphalt pavement (RAP), Recycled asphalt shingles (RAS), Pavement preservation, Think lift, Sustainable, Evaluation |
| 摘要： | Many state transportation agencies have begun exploring and implementing the use of specialized types of Hot Mix Asphalt (HMA) paving mixtures for their potential economic, performance and/or environmental benefits. The specialized asphalt mixture needs for Massachusetts were identified as expanded and increased use of technologies (Warm Mix Asphalt (WMA)); increased use of recycled materials, such as Reclaimed Asphalt Pavement (RAP), Recycled Asphalt Shingles (RAS) and Ground Tire Rubber (GTR); increased use of technologies and recycled materials in combination; and thin lifts for pavement preservation. Previous research has suggested that WMA may increase mixture moisture susceptibility. Additionally, high amounts of recycled materials may adversely impact mixture stiffness and reduce mixture workability. In this study, these types of mixtures were developed and evaluated in terms of stiffness, cracking resistance, moisture susceptibility, and rutting. Testing of 9.5 mm WMA mixtures suggested that aging time and temperature had a significant effect on moisture susceptibility performance. Development and evaluation of a 12.5 mm gap graded mixture (incorporating up to 40% RAP, GTR and WMA) and 9.5 mm pavement preservation thin lift mixtures (incorporating up to 40% RAP, 5% RAS and WMA) indicated acceptable mixture performance in terms of moisture susceptibility and rutting, but decreased cracking performance and reflective cracking. |
| 报告类型： | 科技报告 |
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