DEVELOPMENT OF GEL PERMEATION CHROMATOGRAPHY, INFRARED AND OTHER TESTS TO CHARACTERIZE ASPHALT CEMENTS AND CORRELATE WITH FIELD PERFORMANCE. VOLUME II. APPENDICES

Reliable analytical methods using gel permeation chromatography (GPC) and Fourier transform infrared (FT-IR) were developed to identify the changes that occur in asphalt due to oxidation, aging and solvent hardening. This represents a major breakthrough since the methods appear to accurately reflect the changes in composition and should permit the development of an accurate laboratory aging procedure. These methods have also led to the discovery that existing ASTM procedures for extraction and recovery of asphalt fail in three ways. Highly improved methods have been developed. Numerous tank, hot-mix and roadway samples were collected and analyzed. The results demonstrate a dramatic increase in oxidation and aging with increased pavement voids. Thus, voids need to be as low as possible to slow oxidation and aging to the maximum extent. The increase in carbonyl compounds formed during aging correlated well with voids, viscosity and penetration. The results also indicate that TFOT and RTFOT aging tests do not reproduce the chemical changes which occur in the hot-mix process. A high pressure oxygen apparatus has been designed and constructed to study asphalt aging in the hot-mix process and on the roadway. The results from this study clearly demonstrate that major progress has been made in correlating chemical and physical properties with performance. The analytical methods, extensive analytical results and numerous test sections established around the state will serve as an excellent platform for further work to relate properties to performance and to develop superior asphalts.

• Supplemental Notes:
  • See also Volume I - Final Report.
• Corporate Authors:

  Texas Transportation Institute

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

  Texas State Department of Highways & Public 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
  • Burr Jr, B L
  • Jemison, H B
  • Kyle, ALG
  • Cipione, C A
• Publication Date: 1989-11

Media Info

• Features: Appendices; Figures; Tables;
• Pagination: 197 p.

Subject/Index Terms

• TRT Terms: Asphalt; Asphalt hardening; Chemical analysis; Gel permeation chromatography; Hot mix asphalt; Infrared analysis; Oxidation; Pendulum tests; Resource extraction; Test procedures; Viscosity; Void ratios
• Uncontrolled Terms: Extraction (Chemistry)
• Old TRIS Terms: Aging; Void
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00497235
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-90/458-1F, Res Rept 458-1F, TTI: 2-9-87-458-1F
• Contract Numbers: Study 2-9-87-458
• Files: TRIS, USDOT, STATEDOT
• Created Date: Sep 30 1991 12:00AM