DESIGN AND USE OF SUPERIOR ASPHALT BINDERS. FINAL REPORT

This study is a continuation of Study 1155 whose major objective was to use supercritical fractionation of asphalt to study the effect of asphalt composition changes on properties and to use this knowledge to reblend fractions to make superior asphalts. In this study both supercritical cyclohexane and supercritical pentane have been used to fractionate three reduced crudes and the corresponding AC-20 asphalts into a range of fractions. Because it is not possible to evaluate an asphalt without its long-term road aging characteristics, and because no satisfactory road aging simulation existed, a major effort in this study became the development of a satisfactory aging procedure. It is shown that no aging test run at a single elevated temperature can predict performance at road temperature. Methods are given for predicting low temperature aging from values measured at several higher temperatures. It is shown that the aging characteristics of asphalt can be broken into two parts: the rate of oxidation as measured by carbonyl formation and the susceptibility of the viscosity to increase due to this carbonyl formation. Data indicate that the latter may be primarily a function of compatibility. The relation between viscosity change and carbonyl growth is highly correlated for each asphalt.

• Supplemental Notes:
  • Original date published - November, 1991; Revised, August 1992. Research study title: Design and Use of Superior Asphalt Binders.
• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, 1600 E Lamar Boulevard
  Arlington, TX  United States  76011

  Texas Department of Transportation

  Transportation Planning Division, P.O. Box 5051
  Austin, TX  United States  78763

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Davison, R R
  • Bullin, J A
  • Glover, C J
  • Jemison, H B
  • LAU, C K
  • Lunsford, K M
  • Bartnicki, P L
• Publication Date: 1992-8

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 201 p.

Subject/Index Terms

• TRT Terms: Bituminous binders; Blending; Fractions; Materials selection; Oxidation; Properties of materials; Supersonic flow; Viscosity
• Old TRIS Terms: Aging; Carbonyl formation; Supercritical fractionation
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00626696
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-92/1249-1F, Res Rept 1249-1F, TTI: 2-9-90-1249
• Contract Numbers: Study 2-9-90-1249
• Files: TRIS, USDOT, STATEDOT
• Created Date: Feb 1 1996 12:00AM