RECYCLED ASPHALT

The existing asphaltic concrete (A.C.) surfacing and underlying clay material was pulverized, mixed with quick lime, and compacted to a depth of 0.83 feet in a project to improve the structural section and widen a section of State Highway 45. The operational sequence involved working in 3100 lineal feet sections, 12 feet wide. This required 3 loads of lime or 75 tons for each section. The 3 day work sequence (listed) consisted of : ripping the asphalt and breaking it down to approximately 4-inch diameter size; pulverizing the old A.C. so that 90 percent would pass the 1-1/2 inch screen; spread the lime; final mixing of the material, compacted, trimmed and final rolled. Thus a stable base material was produced. The surfacing received on application of CRS asphaltic emulsion applied at a rate of 0.2 gallon per square yard. A light sand coating was applied, as well as an asphalt concrete blanket. Performance was judged to be good. Comments are made on the use of lime, even quicklime in wintertime.

• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Publication Date: 1976-4

Media Info

• Pagination: p. 50-52
• Serial:
  • Highway Focus
  • Volume: 8
  • Issue Number: 2

Subject/Index Terms

• TRT Terms: Asphalt concrete; Asphalt pavements; Calcium oxide; Pavement performance; Pavement widening; Recycling
• Old TRIS Terms: Quicklimes
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00149793
• Record Type: Publication
• Files: TRIS, USDOT
• Created Date: Apr 13 1977 12:00AM