EFFECTS OF ASPHALT COMPOSITION AND COMPACTION ON THE PERFORMACE OF ASPHALT PAVEMENT MIXTURES. EXECUTIVE SUMMARY

This report is presented in two parts. The first part presents the work done to characterize the fabric of this asphalt sand mix surface and to reproduce this fabric in the laboratory. In addition, it examines the field compaction time requirements for these materials. The second part evaluates the use of blended asphalts, as well as the use of high pressure-gel permeation chromatography to characterize the chemical composition of asphalts. Based upon the comparison of the pore-size distribution of the fabric of both laboratory and field compacted mixtures, the gyratory and kneading compactors created satisfactorily equivalent laboratory fabrics to those of field cores. Very limited performance data suggested that good performance is associated with fabric that has a wide spread of void sizes, with no major portion being concentrated at any one size. No major differences in behavior were found for the artificially blended asphalts, in general, although rich asphaltene asphalts show a higher hardening rate at high temperatures. Blended ROSE asphalts do not create differences in performance than straight-run produced asphalts. The asphalt chemical composition does appear associated with individual performance characteristics; this suggests promise for the use of HP-GPC in the continuing effort to produce quality performance of asphalt pavement mixtures.

• Corporate Authors:

  Purdue University/Indiana Department of Transportation JHRP

  Purdue University, School of Civil Engineering
  West Lafayette, IN  United States  47907-1284

  Indiana Department of Highways

  Indianapolis, IN  United States 

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Wood, L E
  • Altschaeffl, A G
• Publication Date: 1988-5-23

Media Info

• Pagination: 13 p.

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Chemical composition; Compaction; Field tests; Gel permeation chromatography; Laboratory tests; Performance; Pore size distribution; Pressure
• Old TRIS Terms: Blended asphalt; High pressure gel permeation chromatography
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00475995
• Record Type: Publication
• Report/Paper Numbers: FHWA/IN/JHRP-87/7
• Contract Numbers: 1(24), Part II
• Files: TRIS, USDOT, STATEDOT
• Created Date: Sep 30 1988 12:00AM