Development of gel permeation chromatography, infrared and other tests to characterize asphalt cements and correlate with field performance: volumes 1 and 2

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 (A).

• Corporate Authors:

  Texas Transportation Institute

  College Station, Texas  United States 
• Authors:
  • Burr, B L
  • Jemison, H B
  • Kyle, A L
  • Cipione, C A
• Publication Date: 1989-11

Language

• English

Media Info

• Pagination: 453p
• Serial:
  • Issue Number: 458-1F

Subject/Index Terms

• TRT Terms: Binders; Bitumen; Bituminous pavements; Cement; Chromatography; Materials tests; Mathematical models; Metals; Pavement components; Properties of materials
• ATRI Terms: Asphalt; Binder; Bitumen; Cement; Chromatography; Material properties; Material testing; Metal; Modelling; Pavement materials
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01413528
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Aug 24 2012 3:22AM