CHARACTERIZATION OF COLD-RECYCLED ASPHALT MIXTURES

In this study, the long-term behavior of the cold-recycled asphalt mixtures was investigated. The scope of the study covered two types of pavement material, three levels of oxydized condition of the old binder and one type of virgin aggregate. The added softening agents included a high-float asphalt emulsion AE-150, a foamed asphalt, and the rejuvenating agents, Reclamite, Mobilsol and DUTREX 739. Specimens of the recycled mixes were compacted with the gyratory machine, and gyratory indices were obtained during the compaction process. The Resilient Modulus, Hveem Stabilometer R-Value and Marshall parameters were obtained on the compacted recycled mixes. The Water Sensitivity Test was used to evaluate the resistance of the recycled mixes to water. The results of the study indicated that most of the rejuvenating action of the added agents on the old binder took place during the compaction process. The binders of the recycled mixes which underwent the initial softening during the compaction process generally increased in stiffness with increasing curing time. The results indicated that the gyratory indices could be used to determine the optimum binder content of a recycled mix. The structural performance of these recycled mixes was compared to that of an asphalt concrete using a linear elastic multilayer analysis. A mix design for cold recycled asphalt mixtures was recommended from the results of this study. (FHWA)

• Corporate Authors:

  Purdue University/Indiana Department of Transportation JHRP

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

  United States Congress

  Senate Committee on Agriculture, Nutrition and Forestry
  Washington, DC  United States  20510

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Tia, M
• Publication Date: 1982-8-2

Media Info

• Pagination: 290 p.

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Binder content; Cold mix paving mixtures; Gyratory testing machines; Hveem stabilometer; Mix design; Modulus of resilience; Optimization; Oxidation; Recycled materials; Soil compaction test
• Uncontrolled Terms: Rejuvenation
• Old TRIS Terms: Compaction tests; Gyratory tests; Rejuvenating agent
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00369410
• Record Type: Publication
• Report/Paper Numbers: FHWA/IN/JHRP-82/5 Intrm Rpt
• Contract Numbers: 1-(19) Part II
• Files: TRIS, USDOT
• Created Date: Jan 31 1983 12:00AM