Phosphoric Acid as an Asphalt Modifier Guidelines for Use: Acid Type

Different grades of phosphoric acid containing different amounts of orthophosphoric acid are commercially available. The stiffening effect of different phosphoric acid grades was determined by modifying four reference asphalts from the Strategic Highway Research Program (SHRP). This TechBrief briefly summarizes the findings of this research.


  • English

Media Info

  • Media Type: Web
  • Features: Figures;
  • Pagination: 1p
  • Serial:
    • TechBrief
    • Issue Number: FHWA-HRT-08-061
    • Publisher: Federal Highway Administration
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01104043
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-HRT-08-061
  • Files: NTL, TRIS
  • Created Date: Jul 11 2008 2:41PM