Design and use of superior asphalt binders

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 is highly correlated for each asphalt.

• Supplemental Notes:
  • Revised August 1992.
• Corporate Authors:

  Texas Transportation Institute

  College Station, Texas  United States 
• Authors:
  • Davison, R R
  • Bullin, J A
  • Glover, C J
  • Jemison, H B
  • Lau, C K
  • Lunsford, K M
  • Bartnicki, P L
• Publication Date: 1991-11

Language

• English

Media Info

• Pagination: 184p
• Serial:
  • Issue Number: 1249-1F

Subject/Index Terms

• TRT Terms: Aging (Materials); Binders; Bitumen; Bituminous pavements; Chemistry; Mix design; Pavement performance; Properties of materials; Test procedures
• ATRI Terms: Ageing; Binder; Bitumen; Bituminous pavement; Chemistry; Material properties; Mix design; Pavement performance; Test method
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 01403939
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Aug 23 2012 10:06PM