ESTIMATING THE DURABILITY OF CHEM-CRETE MODIFIED PAVING ASPHALT

A laboratory study was conducted in order to estimate the long term performance potential of AC2.5 and AC1.75 paving asphalts containing 6.7% (by weight) of a proprietary modifying ingredient known as Chem-crete. Accelerated aging of asphalts with and without Chem-crete was accomplished by up to 100 hours conditioning in a slightly modified rolling thin film oven. The time variation in penetration and viscosity values through the conditioning period provided a data base used to compute relative load capacity potential of each asphalt cement type. Laboratory findings indicate that Chem-crete type 125.35, at the test mix concentration, may tend to decrease the fatigue life potential of AC1.75 and AC2.5 asphalts. Use of the additive is expected to decrease long-term service life, in terms of 18 Kip EALS, by between 5 and 20% depending on temperature and asphalt grade.

• Record URL:
  • http://www.dot.state.ak.us/stwddes/research/assets/pdf/ak_rd_84_04.pdf
• 
• Corporate Authors:

  Alaska Department of Transportation and Public Facilities

  2301 Peger Road
  Fairbanks, AK  United States  99701
• Authors:
  • McHattie, R L
• Publication Date: 1983

Media Info

• Pagination: 43 p.

Subject/Index Terms

• TRT Terms: Aging (Materials); Asphalt; Asphalt concrete; Fatigue (Mechanics); Laboratory tests; Oven tests; Pendulum tests; Performance; Service life; Thin films; Time duration; Viscosity
• Uncontrolled Terms: Accelerated aging; Fatigue life; Long term; Thin film oven test
• Old TRIS Terms: Chem-crete
• Subject Areas: Design; Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00488175
• Record Type: Publication
• Source Agency: Alaska Department of Transportation and Public Facilities
• Report/Paper Numbers: AK-RD-84-04
• Files: TRIS, STATEDOT
• Created Date: Sep 30 1989 12:00AM