DESIGN OF RECYCLED ASPHALT PAVEMENTS AND SELECTION OF MODIFIERS

Properties of modifiers for recycling of asphalt concrete should be such that the recycled asphalt will have properties essentially the same as neat asphalt with the least addition of modifier possible. Recommended specification requirements for a modifier include a flash point of 200 deg C Cleveland open cup (COC) min, a viscosity range of 90 to 300 cP at 60 deg C, and a composition of at least 9 percent polar compounds and 60 percent aromatic compounds as measured by the clay-gel procedure. Data presented demonstrate the utility of these limits and the detrimental effect of the addition of paraffinic oils. A procedure is presented for bracketing the amount of modifier required to soften an asphalt to a desired consistancy, and data are supplied which demonstrate the utility of this procedure. (Authors)

• Supplemental Notes:
  • The Symposium on Recycling of Bituminous Pavements was held during December Committee Week of the American Society for Testing and Materials, St. Louis, Mo., December 4-9, 1977.
• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Dunning, R L
  • Mendenhall, R L
• Conference:
  • The Symposium on Recycling of Bituminous Pavements was held during December Committee Week of the American Society for Testing and Materials, St. Louis, Mo., December 4-9, 1977.
• Publication Date: 1978

Media Info

• Pagination: p. 35-46

Subject/Index Terms

• TRT Terms: Additives; Asphalt; Asphalt concrete; Flash point; Paraffin; Pavement design; Recycling; Specifications; Viscosity
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 00312250
• Record Type: Publication
• Report/Paper Numbers: ASTM STP 662
• Files: TRIS
• Created Date: Jun 26 1980 12:00AM