In view of its environmental and economic benefits, the use of Recycled Asphalt Shingles (RAS) and Reclaimed Asphalt Pavement (RAP) in Hot-Mix Asphalt (HMA) is on the rise. However, concerns over premature cracking and reduced fatigue life have limited their use in HMA. Polymer-modified asphalt binder is known to enhance the fatigue performance and resistance of HMA to cracking. This study was undertaken to evaluate the effectiveness of using a polymer-modified asphalt binder in asphalt mixes containing RAS and RAP to reduce fatigue cracking. For this purpose, two sets of HMA mixes, one set with a non-polymer-modified and the other set with a polymer-modified asphalt binder, both having identical gradations containing equal amounts of RAS and RAP were designed and tested for fatigue using a four-point bending beam method. It was found that polymer-modified asphalt binder effectively improved fatigue life of HMA mixes containing RAS, RAP, and their combinations. Also, use of RAP and a combination of RAS and RAP in asphalt mixes containing both non-polymer-modified and polymer-modified asphalt binders improved their fatigue lives. However, using only RAS resulted in an adverse effect relative to fatigue performance.
|Original language||English (US)|
|Title of host publication||Challenges and Innovations in Geomechanics - Proceedings of the 16th International Conference of IACMAG - Volume 1|
|Editors||Marco Barla, Alice Di Donna, Donatella Sterpi|
|Publisher||Springer Science and Business Media Deutschland GmbH|
|Number of pages||7|
|State||Published - 2021|
|Event||16th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2021 - Turin, Italy|
Duration: May 5 2021 → May 8 2021
|Name||Lecture Notes in Civil Engineering|
|Conference||16th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2021|
|Period||5/5/21 → 5/8/21|
Bibliographical noteFunding Information:
Acknowledgements. The authors would like to thank Oklahoma Department of Transportation (ODOT) and the Southern Plains Transportation Center (SPTC) for financial support. Special thanks are due to Silver Star Construction Company and Haskell Lemon Construction Company for providing materials for this study. The authors would also like to extend their sincere appreciation to Mr. Kenneth Hobson for his technical assistance.
The authors would like to thank Oklahoma Department of Transportation (ODOT) and the Southern Plains Transportation Center (SPTC) for financial support. Special thanks are due to Silver Star Construction Company and Haskell Lemon Construction Company
© 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.
- Fatigue life
- Hot-mix asphalt (HMA)
- Reclaimed asphalt pavement (RAP)
- Recycled asphalt shingles (RAS)