Re-refined Engine Oil Bottom

The Asphalt Institute’s Technical Advisory Committee has formed a task force on re-refined engine oil bottoms (REOB), also known as Vacuum Tower Asphalt Extender (VTAE). The objectives of this REOB task force are to:

  • Learn more about REOB/VTAE materials, processing, effects/benefits when blended in asphalt and best practices.
  • Recommend a course of action for Asphalt Institute that could include sponsoring a symposium, conducting research and/or developing information and guidance on REOB modification that may be similar to IS-220 for PPA modification.

Toward those objectives, the task force has developed this repository of REOB/VTAE information and wanted to share it with industry.

Published Papers

Use of Re-refined Oil Distillation Bottoms As Extenders For Roading Bitumens P.R. Herrington Journal of Materials Science – Vol. 27 No. 24 – December 1992
Waste Oil Distillation Bottoms As Bitumen Extenders P.R. Herrington, V.K. Dravitzki, C.W.B. Wood, and J.E. Patrick Road & Transport Research – Vol. 2 No. 4 – December 1993
Asphalt modification with used lubricating oil Aaron Villanueva, Susanna Ho, and Ludo Zanzotto Can. J. Civ. Eng. Vol. 35, 2008
Five Year Performance Review of a Northern Ontario Pavement Trial: Validation of Ontario’s Double-Edge-Notched Tension Test (DENT) and Extended Bending Beam Rheometer (BBR) Test Methods S.A.M Hesp, S.N. Genin, D. Scafe, H.F. Shurvell and S. Subramani CTAA – 2009
Characteristics of Rejuvenated Bitumen With Used Lubricating Oil As Rejuvenating Agent Kemas A. Zamhari, Madi Hermadi, Choy Wai Fun International Conference On Sustainable Infrastructure and Built Environment in Developing Countries – November 2009 – ISBN 978-979-98278-2-1
Oxidative Aging Of Asphalt Cements From an Ontario Pavement Trial Logan Wright, Amit Kanabar, Eric Moult, Syed Rubab, and Simon Hesp International Journal of Pavement Research and Technology 4.5 (2011)
Effects of Engine Oil Residues on Asphalt Cement Quality Syed Rubab, Kezia Burke, Logan Wright, Simon A. M. Hesp, Pamela Marks, and Chris Raymond CTAA – 2011
Penetration Testing of Waste Engine Oil Residue Modified Asphalt Cements Burke, K., and S. A. Hesp Proc., 1st Conference of Transportation Research Group of India (CTRG), Bangalore, India, Dec. 2011.
Waste Engine Oil Residue in Asphalt Cement S.A.M. Hesp and H.F. Shurvell MAIREPAV Paper – 2012
Asphalt Binder Modification with Re-Refined Heavy Vacuum Distillation Oil (RHVDO) John D’Angelo, Ken Grzybowski, and Steve Lewis CTAA – 2012
Evaluation of Rejuvenator’s Effectiveness With Conventional Mix Testing For 100% RAP Mixtures Martins Zaumanis, Rajib B. Mallick, and Robert Frank Transportation Research Record: Journal of the Transportation Research Board, No. 2370 – 2013, pp. 17-25
Evaluation of the Performance Properties of Asphalt Mixes Produced with Re-refined Heavy Vacuum Distillate Bottoms John A. D’Angelo, Ken Grzybowski, Steve Lewis, and Rodney Walker CTAA – 2013
Pushing the Asphalt Recycling Technology to the Limit Joel R. M. Oliveira, Hugo M.R.D. Silva, Carlos M.G. Jesus, Liliana P.F. Abreu, and Sara R.M. Fernandes International Journal of Pavement Research and Technology – 6.2 (2013)
Investigation of the Effect of Oil Modification on Critical Characteristics of Asphalt Binders Amir Golalipour A dissertation at the University of Wisconsin – Madison 2013
The Performance of Aged Asphalt Materials Rejuvenated with Waste Engine Oil Christopher D. DeDene and Zhanping You International Journal of Pavement Research and Technology – March 2014
Evaluation of Oil Modification Effect on Asphalt Binder Thermal Cracking and Aging Properties Amir Golalipour, Ph.D. and Hussain Bahia, Ph.D. CTAA – 2014
The Impact of Asphalt Blended with Re-refined Vacuum Tower Bottoms (RTVB) and Its Effect on HMA Mixture Performance Jason C. Wielinski, Anthony J. Kreich, Gerald A. Huber, Andreas Horton, Linda V. Osborn, Heritage Research Group CTAA – 2014
Analysis of vacuum tower asphalt extender and effect on bitumen and asphalt properties Jason C. Wielinski, Anthony J. Kreich, Gerald A. Huber, Andreas Horton, Linda V. Osborn, Heritage Research Group Taylor and Francis – Road Materials and Pavement Design, 2015
Analysis of Asphalt Binders for Recycled Engine Oil Bottoms by X-ray Fluorescence Spectroscopy Terence S. Arnold and Anant Shastry Ph.D. Transportation Research Board Compendium of Papers 2015

Future Research

Presentations at Expert Task Group Meetings

Presentations from past FHWA Asphalt Mix and Asphalt Binder Expert Task Group (ETG) meetings are now available at

The following ETG meetings had serveral REOB related presentations by the individuals shown in parenthesis, which can be downloaded from the site above:

  • Sept 2015 Binder ETG (Buncher, Reinke, Gibson [2], Rowe, D’Angelo, Mohammad)
  • April 2015 Binder ETG (Ahearn [2], Bennert, Buncher, Gibson, Mogawer, Mohanmmad, Planche, Reinke)
  • Sept 2014 Mix ETG (Buncher, D’Angelo et al, Gibson, Ryan et al)

Presentations at Other Public Industry Meetings

REOB Manufacturers Info