Influence of Aging on Oil Rejuvenated Binder

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.

• Periodical: Key Engineering Materials (Volume 737)
• Pages: 528-534
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.737.528
• Online since: June 2017
• Authors: Tomas Koudelka, Michal Varaus, Pavel Sperka*
• Keywords: Ageing, BBR, Dynamic Shear Rheometer (DSR), Oil Rejuvenating, Recycling, Rheological Testing

References

[1] A. Copeland, Reclaimed Asphalt Pavement in Asphalt Mixtures: State of the Practise, Georgton Pike: The Federal Highway Administration, FHWA-HRT-11-021, (2011).

[2] M. Zaumanis, R. Mallick, R. Franck, Evaluation of Rejuvenator's Effectiveness with Conventional Mix Testing for 100% RAP Mixtures, In: TRB 2013 Annual Meeting. Washington D.C., (2013), s. 14.

[3] A. Dony, J. Colin, D. Bruneau, I. Drouadaine, J. Navaro, Reclaimed Asphalt Concretes with High Recycling Rates: Changes in Reclaimed Binder Properties according to Rejuvenating Agent, 41 (2000) 175-181.

DOI: 10.1016/j.conbuildmat.2012.11.031

[4] M. Zaumanis, R. Mallick, R. Franck, Use of Rejuvenators for Production of Sustainable High Content RAP Hot Mix Asphalt, in XXVIII International Baltic Road Conference, (2013).

[5] H. Bailey, S. Zoorob, The Use of Vegetable Oil as a Rejuvenator for Asphalt Mixtures. In: Euroasphalt and Eurobitume Congress. Istanbul, (2012).

[6] A. Golalipour, Investigation of the Effect of Oil Modification on Critical Characteristics of Asphalt Binders, (2013).

[7] A. Villanueva, S. Ho, L. Zanzotto, Asphalt Modification with Used Lubricating Oil, in Canadian J. Civil Eng. 35(2) (2008) 148-157.

DOI: 10.1139/l07-092

[8] J. R. M. Oliveira, H. M. R. D. Silva, C. M. G. Jesus, L. P. F. Abreu, S. R. M. Fernandes, Pushing the Asphalt Recycling Technology to the Limit, Int. J. Pavement Res. Technol. 6(2) (2013) 109-116.

[9] R. Karlsson, U. Isacsson, Bitumen Rejuvenator Diffusion as Influenced by Ageing, Road Mater. Pavement Des. 3(2) (2002) 167-182.

DOI: 10.1080/14680629.2002.9689920

[10] RVS 08. 97. 05 Anforderungen an Asphaltmischgut, Wien, (2010).

[11] F. Migliori, J. -F. Corté, Comparative Study of RTFOT and PAV Aging Simulation Laboratory Tests, J. Transport. Res. Board, 1638(1) (1998) 56-63.

DOI: 10.3141/1638-07

[12] IS-235 State of the knowledge – The use of REOB/VTAE in asphalt, Asphalt Institute, (2016).

[13] M. Corrigan, REOB: ETG Status and Emerging Knowledge, in NCAUPG Technical Conference, (2016).

[14] S. A. M. Hesp, H. F. Shurvell, X-ray Fluorescence Detection of Waste Engine Oil Residue in Asphalt and its Effect on cracking in Service, Int. J. Pavement Eng. 11(6) (2010) 541-553.

DOI: 10.1080/10298436.2010.488729