Effectiveness of Using Polymer-Modified Asphalt Binders in Enhancing Fatigue Life of Asphalt Mixes Containing RAS and RAP

Rouzbeh Ghabchi, Musharraf Zaman, Dharamveer Singh, Manik Barman, David L. Boeck

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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 languageEnglish (US)
Title of host publicationChallenges and Innovations in Geomechanics - Proceedings of the 16th International Conference of IACMAG - Volume 1
EditorsMarco Barla, Alice Di Donna, Donatella Sterpi
PublisherSpringer Science and Business Media Deutschland GmbH
Pages213-219
Number of pages7
ISBN (Print)9783030645137
DOIs
StatePublished - 2021
Externally publishedYes
Event16th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2021 - Turin, Italy
Duration: May 5 2021May 8 2021

Publication series

NameLecture Notes in Civil Engineering
Volume125
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference16th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2021
CountryItaly
CityTurin
Period5/5/215/8/21

Bibliographical note

Funding 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.

Funding Information:
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

Publisher Copyright:
© 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Keywords

  • Fatigue life
  • Hot-mix asphalt (HMA)
  • Reclaimed asphalt pavement (RAP)
  • Recycled asphalt shingles (RAS)

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