A LABORATORY INVESTIGATION INTO THE EFFECTS OF AGGREGATE-RELATED FACTORS OF CRITICAL VMA IN ASPHALT PAVING MIXTURES

This report summarizes research conducted at Iowa State University on behalf of the Iowa Department of Transportation, focusing on the volumetric state of hot-mix asphalt (HMA) mixtures as they transition from stable to unstable configurations. This has traditionally been addressed during mix design by meeting a minimum voids in the mineral aggregate (VMA) requirement, based solely upon the nominal maximum aggregate size without regard to other significant aggregate-related properties. The goal was to expand the current specification to include additional aggregate properties, e.g., finesse modulus, percent crushed fine and coarse aggregate, and their interactions. The work was accomplished in three phases: a literature review, extensive laboratory testing, and statistical analysis of test results.

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 96 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00799096
  • Record Type: Publication
  • Report/Paper Numbers: TR-415,, Final Report
  • Files: TRIS, STATEDOT
  • Created Date: Sep 2 2003 12:00AM