原文传递
Evaluation of Asphalt Binder Performance with Laboratory and Field Test Sections, Technical Report.
| 题名： | Evaluation of Asphalt Binder Performance with Laboratory and Field Test Sections, Technical Report. |
| 作者： | Karki, P.; Zhou, F. |
| 关键词： | Asphalt binder, Performance-Grade (PG), Polymer additives, Performance, Cracking, Fatigue, Selection, Rutting, Durability, Recommendation, Polyphosphoric Acid (PPA), Rheological analysis |
| 摘要： | The current performance-grade (PG) specification for asphalt binders was developed 25 years ago. Over the years, many changes have occurred, including crude oil sources, improved refinery technologies to extract more saturates from crude oil before producing asphalt binders, new additives (such as re-refined engine oil bottoms [REOB], polyphosphoric acid [PPA], bio-rejuvenators), and increased use of reclaimed materials. Consequently, asphalt binders with the same PG may perform completely differently, especially in cracking resistance. Researchers evaluated the performance of asphalt binders engineered with various modification techniques including REOB, PPA, aromatic extracts, bio-rejuvenators, and fatty acids. Both rheological and chemical properties of the engineered binders were characterized in the laboratory. It was found that binders produced with same target PG but with different modification techniques can have quite different rheological and embrittlement properties. Specifically, the parameter ?Tc from bending beam rheolometer is a good parameter for asphalt binder quality or embrittlement. The current binder selection catalog should be expanded for different applications, specifically for asphalt overlay mixes. Researchers also surveyed 11 existing field test sections constructed with soft and polymer modified binders and constructed 6 more new test sections around Texas. The plant mixes from these test sections were collected during the construction and then tested in the laboratory for their dynamic modulus, rutting resistance, and cracking resistance. Based on the laboratory test results and field performance data, researchers recommended a new statewide binder selection catalog. The implementation of the recommendation will make pavements last longer as intended. |
| 报告类型： | 科技报告 |
相关文献
- Laboratory Performance Test for Asphalt Concrete.
- Asphalt Materials and Mixtures 2016, Volume 2: Transportation Research Record: Journal of the Transportation Research Board, No. 2575
- Final Report: Selection and Evaluation of Peifomuince-Graded Asphalt Binders for Vireinia
- Quality Management Plan for Performance-Graded Asphalt Binders. Final rept. (21 Jul 00-30 Jun 02).
- Selection and Evaluation of Performance-Graded Asphalt Binders for Virginia; Final rept. Jun 94-Jun 99
- Investigation of Modified Asphalt Performance using SHRP Binder Specification; Final rept. Dec 94-Jul 97
检索历史
应用推荐
