Publication detail

Influence of aging on oil rejuvenated binder

KOUDELKA, T. VARAUS, M. ŠPERKA, P.

Original Title

Influence of aging on oil rejuvenated binder

Type

conference paper

Language

English

Original Abstract

The presence of aged binder in asphalt mixtures containing high amount of Reclaimed Asphalt Pavement (RAP) is the main reason why the technology of oil rejuvenation (modification) was introduced. When the recycling rate generally exceeds 25 %, it is essential to modify aged binder characteristics in order to guarantee that asphalt mixture performance remains the same as in the case of the virgin mixture. Reclaimed asphalt binder is much stiffer compared to the virgin binder and therefore it is perceived to be susceptible to cracking at low temperatures. The aim of this study is to compare various oil modifiers and evaluate their effects on rheological characteristics before and after the aging. Four different oils were blended together with an artificially aged binder in concentrations which ensure that resulting blends have similar properties as the virgin reference binder. The effect of aging during the production process was simulated by the RTFOT (Rolling Thin Film Oven Test) procedure, long term aging was then simulated by modified RTFOT test with prolonged exposition period. The blends performance assessment was carried out by the frequency sweep test on the Dynamic Shear Rheometer (DSR) and by the evaluation of the critical temperatures on the Bending Beam Rheometer (BBR). The results indicate that addition of oil rejuvenators did not negatively influence binder stiffness at higher temperatures and at the same time enhanced its properties at low temperatures significantly. However, due to the aging effect the difference between stiffness critical temperature and m-value critical temperature increase considerably which might indicate decreasing colloidal stability and lower ability to relax induced stresses.

Keywords

Recycling, oil rejuvenating, aging, rheological testing, DSR, BBR

Authors

KOUDELKA, T.; VARAUS, M.; ŠPERKA, P.

Released

12. 6. 2017

Publisher

Trans Tech Publications Ltd

ISBN

978-3-0357-1033-5

Book

Engineering Materials and Technology

Edition

737

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

737

State

Swiss Confederation

Pages from

528

Pages to

534

Pages count

7

URL

http://www.ttp.net/978-3-0357-1033-5.html

BibTex

@inproceedings{BUT132723,
  author="Tomáš {Koudelka} and Michal {Varaus} and Pavel {Šperka}",
  title="Influence of aging on oil rejuvenated binder",
  booktitle="Engineering Materials and Technology",
  year="2017",
  series="737",
  journal="Key Engineering Materials (print)",
  volume="737",
  pages="528--534",
  publisher="Trans Tech Publications Ltd",
  doi="10.4028/www.scientific.net/KEM.737.528",
  isbn="978-3-0357-1033-5",
  issn="1013-9826",
  url="http://www.ttp.net/978-3-0357-1033-5.html"
}