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Aging characteristics of neat and modified asphalt binders based on rheological evaluations at intermediate temperatures

Farrokhzade, F ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.conbuildmat.2022.126387
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. This study examined the aging of neat and modified binders at intermediate temperatures. The neat binder was modified using two crumb rubber (CR) and styrene–butadiene–styrene (SBS) contents. The linear and non-linear rheological test results and parameters exhibited different aging susceptibilities for each binder. A new aging/cracking parameter is introduced based on the Christen-Anderson model. The limiting values are defined to assess cracking potential after PAV aging. The SBS binders were highly sensitive to aging, but the addition of sulfur noticeably improved their rheological and cracking properties and aging resistance. Among the studied parameters, four were deemed suitable to assess the aging of asphalt binders at intermediate temperatures in a comprehensive manner. © 2022 Elsevier Ltd
  6. Keywords:
  7. Aging ; Aging index ; Modified asphalt binder ; Rheological properties ; Aging of materials ; Asphalt ; Styrene ; Aging characteristics ; Crumb rubber ; Intermediate temperatures ; Modified asphalt binders ; Modified binders ; Non linear ; Rheological property ; Rheological test ; Styrene/butadiene/styrene ; Binders
  8. Source: Construction and Building Materials ; Volume 322 , 2022 ; 09500618 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0950061822000812