Advertisement

A Rheological Study on Rejuvenated Binder Containing Very High Content of Aged Bitumen

  • Marco PasettoEmail author
  • Andrea Baliello
  • Giovanni Giacomello
  • Emiliano Pasquini
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 20)

Abstract

Hot recycling of reclaimed asphalt pavement (RAP) coming from flexible pavement rehabilitation is a technique able to ensure real economic and environmental benefits related to the reduction of virgin bitumen and aggregate supply and to the reuse of a recycled aggregate. Otherwise, adequate performance of recycled materials with high amount of RAP must be guaranteed since the recycling involves the presence of old and stiffened aged binders within the mixture. In this perspective, the present experimental study was aimed at verifying in the laboratory the performance at mid and high-service temperatures of bituminous blends composed by 40% of virgin binder and 60% of old rejuvenated bitumen (simulating aged bitumen coming from RAP). Rheological properties of materials were studied through the dynamic shear rheometer, testing unaged, short-term aged and long-term aged samples. Viscosity, stiffness and permanent deformation resistance of recycled blends seemed to guarantee comparable behavior with those of original bitumens, regardless the aging condition of the materials. These findings seemed to demonstrate the effectiveness of the hot recycling procedure using rejuvenators to obtain suitable bituminous binder containing high amount of aged bitumen.

Keywords

Hot recycling Reclaimed asphalt Rejuvenator DSR 

References

  1. Chen, J.S., Huang, C.C., Chu, P.Y., Lin, K.Y.: Engineering characterization of recycled asphalt concrete and aged bitumen mixed recycling agent. J. Mater. Sci. 42(23), 9867–9876 (2007).  https://doi.org/10.1007/s10853-007-1713-8CrossRefGoogle Scholar
  2. Grilli, A., Iorio Gnisci, M., Bocci, M.: Effect of ageing process on bitumen and rejuvenated bitumen. Constr. Build. Mater. 136, 474–481 (2017).  https://doi.org/10.1016/j.conbuildmat.2017.01.027CrossRefGoogle Scholar
  3. Hugener, M., Kawakami, A.: Simulating repeated recycling of hot mix asphalt. Road Mater. Pavement Des. 18(2), 76–90 (2017).  https://doi.org/10.1080/14680629.2017.1304263CrossRefGoogle Scholar
  4. Izaks, R., Haritonovs, V., Klasa, I., Zaumanis, M.: Hot mix asphalt with high RAP content. Procedia Eng. 114, 676–684 (2015).  https://doi.org/10.1016/j.proeng.2015.08.009CrossRefGoogle Scholar
  5. McDaniel, R., Kowalski, K., Shah, A.: Evaluation of reclaimed asphalt pavement for surface mixtures. Indiana Department of Transportation and Purdue University (2012).  https://doi.org/10.5703/1288284314665
  6. Muller, J., Jenkins, K.J.: The use of an extended rolling thin film ageing method as an alternative to the pressurised ageing vessel method in the determination of bitumen durability. In: 10th Conference on Asphalt Pavements for Southern Africa, KwaZulu Natal (2011)Google Scholar
  7. Newcomb, D.E., Brown, E.R., Epps, J.A.: Designing HMA mixtures with high RAP content. A Practical Guide. Quality Improvement Series 124. National Asphalt Pavement Association, US Department of Transportation, Federal Highway Administration (2007)Google Scholar
  8. Pradyumna, T.A., Jain, P.H.: Use of RAP stabilized by hot mix recycling agents in bituminous road construction. Transp. Res. Procedia 17, 460–467 (2016).  https://doi.org/10.1016/j.trpro.2016.11.090CrossRefGoogle Scholar
  9. Riccardi, C., del Barco Carrión, A.J., Lo Presti, D., Cannone Falchetto, A., Losa, M., Wistuba, M.: A new procedure to determine the rheological properties of RAP binder and corresponding bituminous blends. Constr. Build. Mater. 154, 361–372 (2017).  https://doi.org/10.1016/j.conbuildmat.2017.07.204CrossRefGoogle Scholar
  10. Shen, J., Ohne, Y.: Determining rejuvenator content for recycling reclaimed asphalt pavement by SHRP binder specifications. Int. J. Pavement Eng. 3(4), 261–268 (2002).  https://doi.org/10.1080/1029843021000083685CrossRefGoogle Scholar
  11. Williams, M.L., Landel, R.F., Ferry, J.D.: The temperature dependence of relaxation mechanisms in amorphous polymers and other glass-forming liquid. J. Am. Chem. Soc. 77, 3701–3707 (1955).  https://doi.org/10.1021/ja01619a008CrossRefGoogle Scholar

Copyright information

© RILEM 2019

Authors and Affiliations

  • Marco Pasetto
    • 1
    Email author
  • Andrea Baliello
    • 1
  • Giovanni Giacomello
    • 1
  • Emiliano Pasquini
    • 1
  1. 1.Department of Civil, Environmental and Architectural Engineering (ICEA)University of PaduaPaduaItaly

Personalised recommendations