The Technical Advisory Committee of the Asphalt Institute (AI) formed a task force (TF) in 2014 on re-refined engine oil bottoms (REOB), also known as vacuum tower asphalt extender (VTAE). The charge of the TF was to learn more about REOB /VTAE and its effects when blended into asphalt, and to recommend education, engineering and research efforts that may be needed. Members of the REOB/VTAE TF were from AI’s Technical Advisory Committee and AI’s Health, Safety & Environment Committee. A liaison from FHWA also served on the TF.
This document was produced by AI’s REOB/VTAE TF and approved for publication by AI’s Technical Advisory and Health, Safety & Environment Committees on April 12-13, 2016. It is provided as a free download using the download button below.
Observations, conclusions and recommendations provided in IS-235 are based on the review of information as of the end of 2015. The 89-page document starts with a 2-page Executive Summary.