A PERFORMANCE-BASED MIX-DESIGN METHOD FOR COLD IN-PLACE RECYCLING OF BITUMINOUS PAVEMENTS FOR MAINTENANCE MANAGEMENT

The high cost and environmental impact of pavement rehabilitation has led to an increase in the use of Cold In-Place Recycling (CIR) as an effective alternative to other rehabilitation strategies. However, currently there is not a universally accepted or standard mix-design for CIR. Therefore, the project is being undertaken with the objective to develop a performance-based mix design procedure for CIR through laboratory evaluation and limited field verification. The present project focuses on partial-depth CIR using asphalt emulsions as the recycling agent. After evaluating the modified Marshall mix-design recommended by the AASHTO Task Force No. 38, a new volumetric mix-design has been developed utilizing the Superpave gyratory compactor and technology. It requires that specimens are prepared at densities similar to those found in the field. It also suggests that specimens should be cured at 140 deg F for 24 hours. This will allow for the most consistent specimens, while at the same time, most effectively utilizing the time of laboratory personnel. It will also recommend that the resilient modulus of specimens prepared with the new mix-design will be used for pavement structural design.

• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • LEE, K W
  • Brayton, T E
  • Gress, D
  • Harrington, J
• Conference:
  • Ninth AASHTO/TRB Maintenance Management Conference
  • Location: Juneau, Alaska
  • Date: 2000-7-16 to 2000-7-20
• Publication Date: 2000

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 16p

Subject/Index Terms

• TRT Terms: Asphalt emulsions; Bituminous pavements; Cold in-place recycling; Density; Field tests; Gyratory testing machines; Laboratory tests; Maintenance management; Mix design; Modulus of resilience; Pavement maintenance; Recycling; Specimens
• Uncontrolled Terms: Curing time; Partial depth
• Subject Areas: Highways; Maintenance and Preservation; Materials; I31: Bituminous Binders and Materials; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00795310
• Record Type: Publication
• Report/Paper Numbers: Session A
• Files: TRIS, TRB
• Created Date: Jul 17 2000 12:00AM