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Short Term Aging - Influence of Mixing Time at Laboratory Specimen Production

  • Daniel SteinerEmail author
  • Daniel Maschauer
  • Bernhard Hofko
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 20)

Abstract

The viscoelastic behavior of hot mix asphalt (HMA) is influenced by several factors, e.g. by the binder behavior, which has crucial impact on the pavement performance. The behavior changes due to aging during its in-service life within years, as well as during HMA production and compaction processes within a few hours. Therefore, aging processes are classified into long-term aging (LTA) and short-term aging (STA). This paper presents a study, analyzing STA processes at laboratory productions of HMA slabs. Six production cycles, with up to three slabs each were analyzed. The mix of binder and aggregates were prepared at once. This requires storing the hot and prepared mix inside the laboratory mixer while the first and the second slab are compacted, respectively. Bitumen was recovered for each produced slab. |G*| stiffness tests (DSR) are carried out afterwards at 52–82°C and 1.592 Hz. The results show that mixing times lead to a stiffness increase of 1.5 compared to the virgin bitumen, what is slightly below RTFO aging level. Recovered binder from Slab 2 and Slab 3 show increases of |G*| of 1.9 and 2.5. Therefore, for the used binder, longer mixing times have a significant impact on STA. The results can be used to back-calculate STA levels for specimens that are used for LTA aging studies. Furthermore, both binder and additional HMA stiffness results can serve as basis for multi-scale stiffness modelling by coupling the results.

Keywords

Hot mix asphalt Reverse-Rotation compulsory mixer Short term aging DSR Bitumen 

References

  1. Airey, G.D.: STAR on Ageing Test Meth. for Bit. Pavement Materials. I.J. of Pavem. Eng 4, 165–176 (2003)Google Scholar
  2. Baek, C., Underwood, B., Kim, Y.: Effects of oxidative aging on asphalt mixture properties. Transp. Res. Rec. J. Transp. Res. Board 2296, 77–85 (2012)CrossRefGoogle Scholar
  3. Bell, C.A., Abwahab, Y., Cristi, M.E.: Selection of Laboratory Ageing Procedures for Asphalt Aggregate Mixtures (SHRP-A-383). SHRP, Washington, DC, National Research Council (1994)Google Scholar
  4. CEN: EN 12607-1: Bitumen and bituminous binders – RTFOT. Brussels (2007)Google Scholar
  5. CEN: EN 14769: Bitumen and bituminous binders - PAV. Brussels (2012)Google Scholar
  6. Frigio, F., Raschia, S., Steiner, D., Hofko, B., Canestrari, F.: Aging effects on recycled WMA porous asphalt mixtures. Constr. Build. Mater. 123, 712–718 (2016)CrossRefGoogle Scholar
  7. Morian, N., Hajj, E.Y., Glover, C.J., Sebaaly, P.E.: Oxidative aging of asphalt binders in hot-mix asphalt mixtures. Transp. Res. Rec. 2207, 107–116 (2011)Google Scholar
  8. Petersen, J.: Binder Characterization and Evaluation Volume 4: Test Methods SHRP-A-370. Washington, DC: Transportation Research Board. (Strategic Highway Research Program) (1994a)Google Scholar
  9. Petersen, J.C., Robertson, T., Branthaver, J.F., Harnsberger, P.M., Duvall, J.J., Kim, S.S., Anderson, D.A., Christiansen, D.W., Bahia, H.U., Dongre, R., C.E., A., Sharma, M. G., Button, J. W., Glover, C.J.: Binder Characterization and Evaluation Volume 4: Test Methods (SHRP-A-370). SHRP. Washington, DC, National Reserach Counil (1994b)Google Scholar
  10. Steiner, D., Hofko, B., Dimitrov, M., Blab, R.: Impact of Loading Rate and Temperature on Tensile Strength of Asphalt Mixtures at Low Temperatures. In: Chabot, A., Buttlar, G.W., Dave, V.E., Petit, C., Tebaldi, G. (eds.) 8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements. Dordrecht. Springer, Netherlands (2016a)Google Scholar
  11. Steiner, D., Hofko, B., Hospodka, M., Handle, F., Grothe, H., Fussl, J., Eberhardsteiner, L., Blab, R.: Towards an optimised lab procedure for long-term oxidative ageing of asphalt mix specimen. Int. J. Pavement Eng. 17, 471–477 (2016b)Google Scholar
  12. Teshale, E.Z., Moon, K.H., Turos, M., Marasteanu, M.: Pressure aging vessel and low-temperature properties of asphalt binders. Transp. Res. Rec. 117–124 (2011)Google Scholar

Copyright information

© RILEM 2019

Authors and Affiliations

  • Daniel Steiner
    • 1
    Email author
  • Daniel Maschauer
    • 1
  • Bernhard Hofko
    • 1
  1. 1.Vienna University of TechnologyViennaAustria

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